+0  
 
+41
1230
91
avatar+90192 

 

I am starting this thread to help people learn LaTex and I will put it in with sticky topics

This web page is good for a lot of the basics.

http://www.personal.ceu.hu/tex/cookbook.html#inline

Don't include the dollar signs that surround every thing, they put LaTex into maths mode but the forum is in math mode all the time so don't use them.  I'm not sure if the double dollar signs might be useful - they are for display mode.

-----------------------------------------------------------

There are many LaTex info sites but many are not presented well and I have not found any that are both comprehensive and understandable.

Also remember that there are many different versions of LaTex.  The forum LaTex is by no means comprehensive.  The main irritation I have had with it so far is that it does not accept /align  I have not noticed anyone else aligning things either but if you work it out please let me know.

 
Melody  Apr 28, 2014
social bar

Best Answer 

 #2
avatar+90192 
+19

Thank you Alan,

This is where I want it.  As more bits and peices get added it would be good if it gets cleaned up into a neater thread but for now this is great.

-----------------------------

More limits

$$\small{\text{$\lim \limits_{x \rightarrow \infty } 9\cdot \dfrac{(x+4)(x-2)}{(x-4)(x-6)} =\lim \limits_{x \rightarrow \infty } 9\cdot \dfrac{x^2+2x-8}{x^2-10x+24}=\lim \limits_{x \rightarrow \infty } 9\cdot \dfrac{ \dfrac{x^2}{x^2}+\dfrac{2x}{x^2}-\dfrac{8}{x^2}}{ \dfrac{x^2}{x^2}-\dfrac{10x}{x^2}+\dfrac{24}{x^2}}=\lim \limits_{x \rightarrow \infty } 9\cdot \dfrac{ 1 + \dfrac{2}{x}-\dfrac{8}{x^2}}{ 1 - \dfrac{10}{x}+\dfrac{24}{x^2}}= 9\cdot \dfrac{ 1 }{ 1 }=9 $}}\\\\$$

 

 

\small{\text{$\lim \limits_{x \rightarrow \infty } 9\cdot \dfrac{(x+4)(x-2)}{(x-4)(x-6)}

=\lim \limits_{x \rightarrow \infty } 9\cdot \dfrac{x^2+2x-8}{x^2-10x+24}

=\lim \limits_{x \rightarrow \infty } 9\cdot \dfrac{ \dfrac{x^2}{x^2}+\dfrac{2x}{x^2}-\dfrac{8}{x^2}}{ \dfrac{x^2}{x^2}-\dfrac{10x}{x^2}+\dfrac{24}{x^2}}

=\lim \limits_{x \rightarrow \infty } 9\cdot \dfrac{ 1 + \dfrac{2}{x}-\dfrac{8}{x^2}}{ 1 - \dfrac{10}{x}+\dfrac{24}{x^2}}= 9\cdot \dfrac{ 1 }{ 1 }=9 $}}\\\\

 
Melody  Apr 28, 2014
Sort: 

90+0 Answers

 #1
avatar+26102 
+14

I've discovered how to put labels on a summation sign correctly.  For example:

\begin{document}

Starting with:
$$\frac{3x+h}{x+h}$$

Limit as h tends to zero:
$$\lim_{h\rightarrow0}\frac{3x+h}{x+h}$$


\end{document}

produces

$$Starting with:
$$\frac{3x+h}{x+h}$$

Limit as h tends to zero:
$$\lim_{h\rightarrow0}\frac{3x+h}{x+h}$$$$

 

However, if you leave out the begin{} and end{} and the $$ signs you get (after ignoring the text and first expression):

$$\lim_{h\rightarrow0}\frac{3x+h}{x+h}$$

I don't know if you want this in this thread Melody.  If not I'll delete it and create a separate thread.

 
Alan  Apr 28, 2014
 #2
avatar+90192 
+19
Best Answer

Thank you Alan,

This is where I want it.  As more bits and peices get added it would be good if it gets cleaned up into a neater thread but for now this is great.

-----------------------------

More limits

$$\small{\text{$\lim \limits_{x \rightarrow \infty } 9\cdot \dfrac{(x+4)(x-2)}{(x-4)(x-6)} =\lim \limits_{x \rightarrow \infty } 9\cdot \dfrac{x^2+2x-8}{x^2-10x+24}=\lim \limits_{x \rightarrow \infty } 9\cdot \dfrac{ \dfrac{x^2}{x^2}+\dfrac{2x}{x^2}-\dfrac{8}{x^2}}{ \dfrac{x^2}{x^2}-\dfrac{10x}{x^2}+\dfrac{24}{x^2}}=\lim \limits_{x \rightarrow \infty } 9\cdot \dfrac{ 1 + \dfrac{2}{x}-\dfrac{8}{x^2}}{ 1 - \dfrac{10}{x}+\dfrac{24}{x^2}}= 9\cdot \dfrac{ 1 }{ 1 }=9 $}}\\\\$$

 

 

\small{\text{$\lim \limits_{x \rightarrow \infty } 9\cdot \dfrac{(x+4)(x-2)}{(x-4)(x-6)}

=\lim \limits_{x \rightarrow \infty } 9\cdot \dfrac{x^2+2x-8}{x^2-10x+24}

=\lim \limits_{x \rightarrow \infty } 9\cdot \dfrac{ \dfrac{x^2}{x^2}+\dfrac{2x}{x^2}-\dfrac{8}{x^2}}{ \dfrac{x^2}{x^2}-\dfrac{10x}{x^2}+\dfrac{24}{x^2}}

=\lim \limits_{x \rightarrow \infty } 9\cdot \dfrac{ 1 + \dfrac{2}{x}-\dfrac{8}{x^2}}{ 1 - \dfrac{10}{x}+\dfrac{24}{x^2}}= 9\cdot \dfrac{ 1 }{ 1 }=9 $}}\\\\

 
Melody  Apr 28, 2014
 #3
avatar+90192 
+9

Here are some arrow comands that may be useful

http://access2science.com/latex/Arrows.html

 Useful symbols

http://www.math.sinica.edu.tw/tex/aassymbols.pdf

http://omega.albany.edu:8008/Symbols.html

Ninja found this one - it seems quite comprehensive (1/8/14)

http://latex.wikia.com/wiki/List_of_LaTeX_symbols

 
Melody  Apr 29, 2014
 #4
avatar+90192 
+6

I just made this up in Texmaker.

It won't work in here at the moment because some of the packages are missing.

Another thing to talk to Andre about - this is often a problems.

More limits by Heureka here

http://web2.0calc.com/questions/if-x-0-what-is-the-qotient-of-40-x#r106714

 I tried the code below but it didn't work  

 

 

HEUREKA HAS SHOWN ME HOW TO DO IT    (14/10/14)

\sum \limits_{n=1}^{\infty} :            $$\sum \limits_{n=1}^{\infty}$$

---------------------------------------------------------------------------------------------------- 

\displaystyle \lim_{x\rightarrow -1}\;\;\dfrac{|x+1|}{x^2+1}

$$\displaystyle \lim_{x\rightarrow -1}\;\;\dfrac{|x+1|}{x^2+1}$$

 

-----------------------------------------------------------------------------------------------------

 

140504 Sigma in Latex

 

More ideas from LancelotLink

\ V(x)=\dfrac{W}{m}\ = \dfrac{1}{m}\int \limits_{\infty}^{x}\ F\ dx =\dfrac{1}{m}\int \limits_{\infty}^{x}\dfrac{GmM}{x^2}dx=-\dfrac{GM}{x}

 

 

 

$$\ V(x)=\dfrac{W}{m}\ = \dfrac{1}{m}\int \limits_{\infty}^{x}\ F\ dx =\dfrac{1}{m}\int \limits_{\infty}^{x}\dfrac{GmM}{x^2}dx=-\dfrac{GM}{x}$$

 
Melody  May 4, 2014
 #5
avatar+90192 
+6

I posted a page of latex before and now it is all gone!

I must of forgotten to hit "Publish" I am a drongo!  I'll have to do it again - Later.

(Drongo is Australian slang meaning 'a fool', but when used like this it is light hearted.  

It is also the name of an Australian bird.)

 
Melody  May 6, 2014
 #6
avatar+90192 
+14

I am just going to add examples here.

-------------------------------------------------------------------------

(2x+7)(4x-1)\leq 0 \Rightarrow \left[-\dfrac 7 2 \leq x \leq \dfrac 1 4 \right]

$$(2x+7)(4x-1)\leq 0 \Rightarrow \left[-\dfrac 7 2 \leq x \leq \dfrac 1 4 \right]$$        By Rom

-------------------------------------------------------------------------

\left[-\dfrac 7 2 \leq x \leq \dfrac 1 4 \right] \bigcup \left\{\dfrac 1 2 \right\}

$$\left[-\dfrac 7 2 \leq x \leq \dfrac 1 4 \right] \bigcup \left\{\dfrac 1 2 \right\}$$    By Rom

 
Melody  May 7, 2014
 #7
avatar+90192 
+11

Heureko's LaTex

http://web2.0calc.com/questions/what-is-mod  

latex code:

\\\boxed{(a\bmod b)=a-b\lfloor\frac{a}{b}\rfloor}\\
\\
Example: \quad 299\bmod 12=299-12*\lfloor\frac{299}{12}\rfloor\\ 
= 299-12*24=299-288=11

$$\lfloor \dots \rfloor = floor function$$

latex code:

\lfloor \dots \rfloor = floor function

output:

$$\\\boxed{(a\bmod b)=a-b\lfloor\frac{a}{b}\rfloor}\\
\\
Example: \quad 299\bmod 12=299-12*\lfloor\frac{299}{12}\rfloor\\
= 299-12*24=299-288=11

\lfloor \dots \rfloor = floor function

latex code:

\lfloor \dots \rfloor = floor function$$

 
Melody  May 15, 2014
 #8
avatar+90192 
+11

This is posted on the Latex thread in the sticky notes.

 

$$\begin{array}{rlllr}
( x^3&+4x^2&+x& -6)&:(x-1)=\textcolor[rgb]{1,0,0}{x^2}\textcolor[rgb]{0,0,1}{+5x}\textcolor[rgb]{0,1,0}{+6}\\
\textcolor[rgb]{1,0,0}{{\underline{-(x^3}}&\textcolor[rgb]{1,0,0}{\underline{-x^2)}}}&&&\\
0&+5x^2&+x\\
&\textcolor[rgb]{0,0,1}{\underline{-(5x^2}}&\textcolor[rgb]{0,0,1}{\underline{-5x)}}\\
&0&+6x&-6\\
&&\textcolor[rgb]{0,1,0}{\underline{-(6x}}&\textcolor[rgb]{0,1,0}{\underline{-6)}}\\
&&0&+0
\end{array}$$

 

 

division in latex code:

\begin{array}{rlllr}

( x^3&+4x^2&+x& -6)&:(x-1)=\textcolor[rgb]{1,0,0}{x^2}\textcolor[rgb]{0,0,1}{+5x}\textcolor[rgb]{0,1,0}{+6}\\

\textcolor[rgb]{1,0,0}{{\underline{-(x^3}}&\textcolor[rgb]{1,0,0}{\underline{-x^2)}}}&&&\\

0&+5x^2&+x\\

&\textcolor[rgb]{0,0,1}{\underline{-(5x^2}}&\textcolor[rgb]{0,0,1}{\underline{-5x)}}\\

&0&+6x&-6\\

&&\textcolor[rgb]{0,1,0}{\underline{-(6x}}&\textcolor[rgb]{0,1,0}{\underline{-6)}}\\

&&0&+0

\end{array}

-----------------------

Many Greetings

Heureka (Eureka)

 

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

 

This is another possibility for long division

 

http://web2.0calc.com/questions/how-do-u-do-92-divide-6-3-in-long-division-nbsp

 

$$\;1\textcolor[rgb]{0,1,0}{4}\\
63|\bar{9}\bar{2}\bar{0} \qquad $63 goes into 92 just once$\\
'\;\;\;63\downarrow \qquad\; 1*63=63\\
'\;\;\;290\_\qquad\quad 92-63=29 \qquad $and bring down the 0$\\
'\;\;\;252\qquad\quad \textcolor[rgb]{0,1,0}{\mbox{63 goes into 290 4 times and 4*63=252}}\\
'\;\;\;\;\bar{3}\bar{8}\qquad \quad 290-252=38 $ The remainder is 36$$$

 

Coding is very messy though

\;1\textcolor[rgb]{0,1,0}{4}\\ 63|\bar{9}\bar{2}\bar{0} \qquad $63 goes into 92 just once$\\ '\;\;\;63\downarrow \qquad\; 1*63=63\\

'\;\;\;290\_\qquad\quad 92-63=29 \qquad $and bring down the 0$\\

'\;\;\;252\qquad\quad \textcolor[rgb]{0,1,0}{\mbox{63 goes into 290 4 times and 4*63=252}}\\ '\;\;\;\;\bar{3}\bar{8}\qquad \quad 290-252=38 $ The remainder is 36$

 
Melody  May 15, 2014
 #9
avatar+90192 
+3

Hi Heureka,

I pasted your code (in the above post) into Texmaker at home and it will not run.  I want to play with it.  I thought it may need the $ signs around it but that didn't help.  Have you got any ideas on how i can get it to run.  I am not very good at deciphering the error messages.  I can past in the errors if it would help.

any ideas?

Thank you.

 
Melody  May 15, 2014
 #10
avatar+90192 
+6

More great Latex from Heureka.  Thanks.

 

$$\\\left(0.084\;\frac{kg}{
\textcolor[rgb]{1,0,0}{\not}{w}\textcolor[rgb]{1,0,0}{\not}{e}\textcolor[rgb]{1,0,0}{\not}{e}\textcolor[rgb]{1,0,0}{\not}{k}
}\right)* \left( \frac{1\;
\textcolor[rgb]{1,0,0}{\not}{w}\textcolor[rgb]{1,0,0}{\not}{e}\textcolor[rgb]{1,0,0}{\not}{e}\textcolor[rgb]{1,0,0}{\not}{k}
}{7\;days} \right)=\frac{0.084}{7}\frac{kg}{days}=0.012\;\frac{kg}{days}\\\\
\Rightarrow 0.012\;\mbox{kg per day}$$

 

\\\left(0.084\;\frac{kg}{
\textcolor[rgb]{1,0,0}{\not}{w}\textcolor[rgb]{1,0,0}{\not}{e}\textcolor[rgb]{1,0,0}{\not}{e}\textcolor[rgb]{1,0,0}{\not}{k}
}\right)* \left( \frac{1\;
\textcolor[rgb]{1,0,0}{\not}{w}\textcolor[rgb]{1,0,0}{\not}{e}\textcolor[rgb]{1,0,0}{\not}{e}\textcolor[rgb]{1,0,0}{\not}{k}
}{7\;days} \right)=\frac{0.084}{7}\frac{kg}{days}=0.012\;\frac{kg}{days}\\\\
\Rightarrow  0.012\;\mbox{kg per day}

http://web2.0calc.com/questions/need-helppp-please-answer

I had to add a couple of preamble lines to get it to work in Texmaker.

\usepackage{pgfplots}

\pgfplotsset{compat=1.10}
 
Melody  May 16, 2014
 #11
avatar+90192 
+3

$$\\\left(
\frac
{
1\;glass\
}
{
\frac{1}{8}\;\textcolor[rgb]{1,0,0}{\not}l
}
\right)*
\left( \frac{2.5\;
\textcolor[rgb]{1,0,0}{\not}{l}
}
{1\;bottle} \right)=2.5*8\;\frac{glass}{bottle}=20\;\frac{glass}{bottle}\\\\
\Rightarrow 20\;\mbox{glass per one bottle}$$

 

\\\left(
\frac
{
1\;glass\
}
{
\frac{1}{8}\;\textcolor[rgb]{1,0,0}{\not}l
}
\right)*
\left( \frac{2.5\;
\textcolor[rgb]{1,0,0}{\not}{l} 
}
{1\;bottle} \right)=2.5*8\;\frac{glass}{bottle}=20\;\frac{glass}{bottle}\\\\
\Rightarrow  20\;\mbox{glass per one bottle}

By Heureka

 
Melody  May 16, 2014
 #12
avatar+90192 
+3

More Latex by Heureka:    

http://web2.0calc.com/questions/fractions_73#r106327

TexMaker  (Needed to add to make it work Both go in the preamble)

\usepackage{pgfplots}

\pgfplotsset{compat=1.10}
 
Melody  May 16, 2014
 #13
avatar+90192 
+3

\theta= \tan^{-1}{(\frac{\Delta{y}}{\Delta{x}})} =

$$\theta= \tan^{-1}{(\frac{\Delta{y}}{\Delta{x}})} =$$

By Heureka.

 
Melody  May 20, 2014
 #14
avatar+90192 
+4

 

 

\begin{array}{rll} 2x-8&=&6-5x\\ 7x&=&14\\ x&=&2 \end{array}

$$\begin{array}{rll}

2x-8&=&6-5x\\
7x&=&14\\
x&=&2
\end{array}$$

 
Melody  May 21, 2014
 #78
avatar+6794 
+1

\begin{array}{rll} 2x-8&=&6-5x\\

 7x&=&14\\

x&=&2

\end{array}

 
MaxWong  Aug 1, 2016
 #16
avatar+90192 
+3
Melody  Jun 6, 2014
 #17
avatar+90192 
+3

$$\[ \left( \begin{array}{cc}
1 & 2 \\
3 & 4
\end{array} \right)
%
\left( \begin{array}{cc}
2 & 6 \\
-1 & 0
\end{array} \right)=
%
\left( \begin{array}{cc}
0 & 6 \\
2 & 18
\end{array} \right)
\]
\[ \left( \begin{array}{cc}
0 & 6 \\
2 & 18
\end{array} \right)+
%
\left( \begin{array}{cc}
2 & 6 \\
-1 & 0
\end{array} \right)=
%
\left( \begin{array}{cc}
0 & 12 \\
1 & 18
\end{array} \right)
\]$$

\[ \left( \begin{array}{cc}
1 & 2 \\
3 & 4
\end{array} \right)
%
\left( \begin{array}{cc}
2 & 6 \\
-1 & 0
\end{array} \right)=
%
\left( \begin{array}{cc}
0 & 6 \\
2 & 18
\end{array} \right)
\]
\[ \left( \begin{array}{cc}
0 & 6 \\
2 & 18
\end{array} \right)+
%
\left( \begin{array}{cc}
2 & 6 \\
-1 & 0
\end{array} \right)=
%
\left( \begin{array}{cc}
0 & 12 \\
1 & 18
\end{array} \right)
\]

 
Melody  Jun 16, 2014
 #18
avatar+90192 
+6

 By Heureka

       $$\boxed{\begin{array}{lrcrcrr} (1) &5x & - & 14 &=& a &\\(2)& 2x& + & 1 &=& a &\\&--&-&--&-&--&\\(1) - (2)& 3x&-&15&=&0 & \quad | \quad :3\\&x&-&5&=&0 & \quad | \quad +5\\&\textcolor[rgb]{1,0,0}{x}&&&\textcolor[rgb]{1,0,0}{=}&\textcolor[rgb]{1,0,0}{5} &\end{array}}$$

\boxed{\begin{array}{lrcrcrr} (1) &5x & - & 14 &=& a &\\(2)& 2x& + & 1 &=& a &\\&--&-&--&-&--&\\(1) - (2)& 3x&-&15&=&0 & \quad | \quad :3\\&x&-&5&=&0 & \quad | \quad +5\\&\textcolor[rgb]{1,0,0}{x}&&&\textcolor[rgb]{1,0,0}{=}&\textcolor[rgb]{1,0,0}{5} &\end{array}}

 
Melody  Jun 17, 2014
 #19
avatar+90192 
+3

(This one is cutesy of Reinout-g)

\begin{array}{|l|l|}32\% & 100\%\\0.32 & 1.00\\43.7 & 136.5625\\\end{array}   

$$\begin{array}{|l|l|}32\% & 100\%\\0.32 & 1.00\\43.7 & 136.5625\\\end{array}$$

 
Melody  Jun 20, 2014
 #20
avatar+90192 
+3

Another from Heureka.  Thank you

http://web2.0calc.com/questions/5x-8-3x-3-whats-the-x

 

\underbrace{5x-3x}_{2x}-8=\underbrace{3x-3x}_0+3

 

$$\underbrace{5x-3x}_{2x}-8=\underbrace{3x-3x}_0+3$$

 
Melody  Jul 22, 2014
 #21
avatar+90192 
+6

\begin{tabular}{|c|c|c|c|c|c|}

\hline
$x$&1&2&3&4&5\\\hline
$f(x)$&2&10&30&68&\\\hline

$$\begin{tabular}{|c|c|c|c|c|c|}

\hline
$x$&1&2&3&4&5\\\hline
$f(x)$&2&10&30&68&\\\hline
\end{tabular}$$

 
Melody  Jul 23, 2014
 #22
avatar+8255 
+6

I am confused. What is @@LaTex

 
DragonSlayer554  Jul 27, 2014
 #23
avatar+8255 
+6

Melody, how do I write a graph so I can write it in an answer or a question with @@LaTex?

 
DragonSlayer554  Jul 29, 2014
 #24
avatar+90192 
+6

LaTex is a program for writing mathematical things.  It is what we use for all the presentations shown above.

If you would like to start learning you can start a new thread in the main part of the forum asking for some beginner lessons.  Please don't post in here any more because this thread is just for Latex reference not for learning with member help if that makes sense.

If anyone is really serious about learning, here is a good place to start

https://www.youtube.com/playlist?list=PLTejunv6WZfG-b9a0o0OcVMRpIJIlcHhF

This is where i got all my initial knowledge.  Alan started here too.

 
Melody  Jul 30, 2014
 #25
avatar+90192 
+9

This message was sent to me by NinjaDevo via private message.

I am copying it here because it will probably be of interest to other people as well.

NINJA'S QUESTION:

I was looking through those LaTeX videos you posted in the LaTeX thread. 
I was wondering though, what's the difference between beginning a document and an array? For example, I see in some of your posts you did "\begin{array}{rll}" What does this mean and what does the rll mean in the brackets? 

Thanks, 
~Ninja 

MELODY'S ANSWER:

There a many different versions of LaTex which is really annoying. I am still glad I started with the videos, although i have actually not studied all of them. I should, it would probably help a lot.

When you write in Texmaker you have to enter the whole program, there are shortcuts to help you but you can still still see the whole thing. On any maths forum it is different. Some of it is pre-written so that you do not need to enter lines such as \begin{document} They have already been entered for you.

array is the term used when you want to line up objects such as equal signs.  There are a number of different types of arrays but this forum only seems to have the one.  It does everything the others do it is just a little harder to use and to be honest i haven't totally worked it out yet.

If i was going to wrtite a standard equation with the equal signs lined up then I woudl use 

I have added a litle equation solution to show you how it works

\begin{array}{rll}   note this must be ended with     

x-6&=&12\\

x&=&18

\end{array}    or it will not work!

Now array means you are lining things up.  r stands for right, l for left and c for centre.

The equal signs are going to line up.

The first input is going to be right aligned against the first&

The equal sign is pushed left so it butts up against the invisable first&

Then the other side of the equation is pushed left as well to butt up against the second &

There is always one more alignment command (l,r, or c) than the number of ampersands & used.

Now let's see if my code works.

$$\begin{array}{rll}
x-6&=&12\\
x&=&18
\end{array}$$

Good it worked well.     

Does that help Ninja?

 
Melody  Jul 30, 2014
 #26
avatar+3450 
+9

Wow! That actually helped alot!

Thanks Melody. :)

 
NinjaDevo  Jul 30, 2014
 #27
avatar+90192 
+9

31/7/14

Learning Latex Thread for beginners

http://web2.0calc.com/questions/here-is-a-question-just-for-latex-beginners-like-draagonslayer#r1

----------------------------------------------------------------------------------

What does this mean

\begin{array}{*{20}c}    Heureka answers here

http://web2.0calc.com/questions/here-is-a-question-just-for-latex-beginners-like-draagonslayer#r17

 
Melody  Jul 31, 2014
 #28
avatar+3450 
+14

I found a list of LaTeX symbols with the command for them.

http://latex.wikia.com/wiki/List_of_LaTeX_symbols

 

This may be usefull to bookmark or refer back to.

 
NinjaDevo  Jul 31, 2014
 #29
avatar+90192 
+9

I've just added the wiki referrnce address to the LaTex thread.

Thanks Ninja.

 
Melody  Jul 31, 2014
 #30
avatar+8255 
+4

I did it Melody.

I will do it again.

$$6\frac{3}{4}$$

See Melody, I am really smart.

LOL

 
DragonSlayer554  Aug 1, 2014
 #31
avatar+3450 
+6

Hey guys,

I had another question about LaTeX. 
How do you put a single space between words in LaTeX? I know you can do /quad to put 4 spaces between text in LaTeX, but is there a way to put just one space, like when writing a sentence? 

 
NinjaDevo  Aug 4, 2014
 #32
avatar+90192 
+9

Hi Ninja, my knowledge is not great - this is about all that I know 

SPACING

67

6\;7

6\:7

6\quad7

6\qquad7

-----------------------------

$$\\67\\
6\:7\\
6\;7\\
6\quad7\\
6\qquad7\\$$

 

Here is another 'learning LaTex' page from today.

http://web2.0calc.com/questions/3y-5x-13

 
Melody  Aug 4, 2014
 #33
avatar+90192 
+9

Bold display

$$\mathbf{9.6*10^{14}}$$

\mathbf{9.6*10^{14}}

-------------------------------------------------

More LaTex display discussion.  Using $$ to turn off math mode

http://web2.0calc.com/questions/5-6-8-9

 
Melody  Aug 6, 2014
 #34
avatar+8255 
+5

Hello, everyone. I have 2 questions.

Question 1) I really need to know how to make a graph in @@LaTex, but I can't figure out how to make one. Can somebody help me out please?

Question 2) Why do I have to use $$, \begindocument, and \enddocument in @@LaTex? Please help me. Thanks.

 
DragonSlayer554  Aug 9, 2014
 #35
avatar+90192 
+6
Melody  Aug 9, 2014
 #36
avatar+90192 
+11

Sorry Dragon I didn't see your last post when I posted mine - Does that make sense?

Question 1) I really need to know how to make a graph in @@LaTex, but I can't figure out how to make one. Can somebody help me out please?

I don't think that you can - you can make a table but not a graph.  What did you want to graph and I will tell you how we would do it?

Question 2) Why do I have to use $$, \begindocument, and \enddocument in @@LaTex? Please help me. Thanks.

I explained $$ in my last post.  It allows you to escape maths mode which is the default mode for the forum.  Look at my last post there is a lot more info there.

You do not need to use \begin{document} or \end{document} in the forum.

I think that you may have seen Alan use this? Alan writes his LaTex on his own computer in a program that he downloaded called Texmaker.  This is where we both learned LaTex.  He then copies the whole thing straight onto the forum.  If you use Texmaker then you have to enter begin document etc or it won't work.  In the forum that has already been done for you.  So I think that these lines do nothing at all when you use LaTex in the forum.

There does that answer your excellent questions Dragon?

 
Melody  Aug 9, 2014
 #37
avatar+8255 
+11

Well, yes. I meant table. 

So, how do I make a table in @@LaTex?

(I always make a mistake when I say graph instead of table)

 
DragonSlayer554  Aug 11, 2014
 #38
avatar+90192 
+6

Look in the LaTex thread.  I'm pretty sure you will find the information that you need in there. 

Sorry - you are already in the LaTex thread.

Try this post.

http://web2.0calc.com/questions/latex#r21

 
Melody  Aug 12, 2014
 #39
avatar+1314 
+11

Please show how to do summation symbol as i tried and it is not the same as elsewhere. Thanks. Also please say if $$ is input as dollar signs or backslashes and its puoose

 
Stu  Aug 16, 2014
 #40
avatar+8255 
0

Thanks Melody.

So, I just copy everything but I just cange a little things?

 
DragonSlayer554  Aug 16, 2014
 #41
avatar+90192 
+3

How to draw an answer box in LaTex. Or any box for that matter.

 

\fbox{\begin{minipage}{0.6cm}\hfill\vspace{0.6cm}\end{minipage}}        $$\fbox{\begin{minipage}{0.6cm}\hfill\vspace{0.6cm}\end{minipage}}$$

-------------------------------------------------------------------------------------------

 
Melody  Aug 18, 2014
 #42
avatar+90192 
+3

LaTex  Dragon's question also answers Stu's question.

 Question 2) Why do I have to use $$, \begindocument, and \enddocument in @@LaTex? Please help me. Thanks.

 

 You do not need to use any of this dragon.  Not in this forum anyway.

 Alan and I do use $$ sometimes.

 When writing in Latex you can be in maths mode or in non-maths mode.

 In this forum the default mode is maths mode.  If you do not want this you can cancel it at the very beginning of your program by entering $$  However, you do not need to do this.  You can just work in maths mode which is what most people do.

 This symbol \ is called a backslash

\\ means start a new line.  This is not done automatically you have to 'tell the code to do it' with this command.

 One \ indicates a function is coming.  Sometimes functions have 1 or more 'arguaments' these must be put in parentheses { }

 like \frac{1}{2} or \sqrt{49} or \quad

 If you want to display a $ sign you need to put \$ because $ is a reserved key and so this will symolise that it is ONLY the symbol itself that you want.

 Now Dragon.  Yes if you want to do something that has been demonstrated.  Just copy the code and change little things.  You will slowly gain understanding about what everything means.

 I hope that all this information helps.  

 
Melody  Aug 18, 2014
 #43
avatar+8255 
0

Yes. It helps. But do I change the x and y part?

 
DragonSlayer554  Aug 21, 2014
 #44
avatar+90192 
+6

Dragon - What x and y part?

also can you continue this in a new thread on the forum please.

This thread is intended more for information - not so much for questions.  

You can giveyour new thread a title something like LaTex help 

If you want to refer to something that I have written here maybe you could copy it over so I know what you are talking about.   

 
Melody  Aug 21, 2014
 #45
avatar+8255 
0

I mean this.

\begin{tabular}{|c|c|c|c|c|c|}

\hline
$x$&1&2&3&4&5\\\hline
$f(x)$&2&10&30&68&\\\hline

So, can I make a Thread that says, @@LaTex Questions?

 
DragonSlayer554  Aug 23, 2014
 #46
avatar+8255 
0

I posted the answer and I am waiting.

 
DragonSlayer554  Sep 2, 2014
 #47
avatar+90192 
+6

Yes fine dragon.  I only just saw this.

You can ask questions on the forum, that is what it is for.

I don't know that you have enough knowledge yet to answer other people's LaTex. (But you are welcome to try)

I think you should concentrate on improving your own LaTex first.   

 
Melody  Sep 2, 2014
 #48
avatar+8255 
+3

Try my best, I will. But help others, is later.

 
DragonSlayer554  Sep 8, 2014
 #49
avatar+90192 
+3

$$\begin{tabular}{cccccc}
&&\;x^2&-11&+28&
&&&||&||&||&||&
x&-2&\|\;x^3&-13x^2&+50x&-56\\
&&\;x^3&-2x^2&&&
&&||&||&||&||&
&&&-11x^2&+50x&-56&\\
&&&-11x^2&+22x&&
&&&||&||&||&
&&&&+28x&-56&\\
&&&&+28x&-56&
&&&&||&||&
&&&&&0&
\end{tabular}$$

 

\begin{tabular}{cccccc} &&\;x^2&-11&+28& &&&||&||&||&||& x&-2&\|\;x^3&-13x^2&+50x&-56\\ &&\;x^3&-2x^2&&& &&||&||&||&||& &&&-11x^2&+50x&-56&\\ &&&-11x^2&+22x&& &&&||&||&||& &&&&+28x&-56&\\ &&&&+28x&-56& &&&&||&||& &&&&&0& \end{tabular}

 
Melody  Sep 15, 2014
 #50
avatar+269 
+8

I found out that the dollar sign is \.

 
Pyramid  Oct 1, 2014
 #51
avatar+285 
+3

How to do Latex Coding's

 
SelenaPubblT  Oct 2, 2014
 #52
avatar+90192 
+3

Hi Selena, 

you learn by copying - justr little things at first like making a fraction.  there is lots of code that you can play with in this thread.   :)

 
Melody  Oct 3, 2014
 #53
avatar+285 
+3

Ok kcool an hey XD

 
SelenaPubblT  Oct 7, 2014
 #54
avatar+270 
0

Do you guys actually type all the letters?

 
flflvm97  Dec 11, 2014
 #55
avatar+90192 
0

Sometimes I copy them from here and paste them in but mostly i type them all.  :)

I usually work the problems out and code them straight in at the same time.

I often refer back to this thread to get the more complicated code that I want to use. 

This thread could really use cleaning up but for the moment it works for me. :)

I am not sue how many other people use it - not many I think.

LaTex is cool.  It is fun to learn, fun to use, and it makes the answers (and questions) easier to read and easier to interprete. 

 
Melody  Dec 13, 2014
 #56
avatar+90192 
0

Heueka just wrtote some electricity formulas with LaTex - a few new symbols I think.  Thanks Heureka.

http://web2.0calc.com/questions/if-voltage-source-is-12-resistance-is-6800-and-voltage-1-is-8-what-is-r2#r1

 
Melody  Jan 9, 2015
 #57
avatar+90192 
+3

Another of Heureka's masterpeices.   (26/1/15)

 

 

 

$$\left[\ 1+\frac{1}{3}+\frac{2}{3}+\frac{2}{9}+\frac{4}{9}+\frac{4}{27}+\frac{8}{27} +\frac{8}{81} +\frac{16}{81}+\dots \ \right] \\\\ \\= 1+ \frac{1}{3} + \frac{2}{3} + \underbrace{\frac{1}{3}*\frac{2}{3} }_{=\frac{2}{9}}+ \underbrace{\frac{2}{3}*\frac{2}{3} }_{=\frac{4}{9}}+ \underbrace{\frac{1}{3}*\frac{4}{3^2} }_{=\frac{4}{27}}+ \underbrace{\frac{2}{3}*\frac{4}{3^2} }_{=\frac{8}{27}}+ \underbrace{ \frac{1}{3}* \frac{8}{3^3}}_{=\frac{8}{81}}+ \underbrace{\frac{2}{3}*\frac{8}{3^3}}_{=\frac{16}{81}}+\dots \ \\\\\\= 1+ ( \underbrace{\frac{1}{3} + \frac{2}{3} }_{=1} )+ ( \underbrace{\frac{1}{3} + \frac{2}{3} }_{=1} )*\frac{2}{3}}+ ( \underbrace{\frac{1}{3} + \frac{2}{3} }_{=1} )*\frac{4}{3^2}}+ ( \underbrace{\frac{1}{3} + \frac{2}{3} }_{=1} )*\frac{8}{3^3}}+\dots \ \\\\\\= 1+ ( \underbrace{\frac{1}{3} + \frac{2}{3} }_{=1} )+ ( \underbrace{\frac{1}{3} + \frac{2}{3} }_{=1} )*\frac{2}{3}}+ ( \underbrace{\frac{1}{3} + \frac{2}{3} }_{=1} )*\frac{2^2}{3^2}}+ ( \underbrace{\frac{1}{3} + \frac{2}{3} }_{=1} )*\frac{2^3}{3^3}}+\dots \ \\\\\\= 1+ 1+ \frac{2}{3}}+ \frac{2^2}{3^2}}+ \frac{2^3}{3^3}}+\dots \ \\\\\\s=1+1*( \frac{2}{3} ) ^0+1*(\frac{2}{3})^1+1*(\frac{2}{3})^2+1*(\frac{2}{3})^3+1*(\frac{2}{3})^4+\dots \$$

 

 

 

\left[\ 1+\frac{1}{3}+\frac{2}{3}+\frac{2}{9}+\frac{4}{9}+\frac{4}{27}+\frac{8}{27} +\frac{8}{81} +\frac{16}{81}+\dots \ \right] \\\\\\

= 1+ \frac{1}{3} + \frac{2}{3} + \underbrace{\frac{1}{3}*\frac{2}{3} }_{=\frac{2}{9}}+ \underbrace{\frac{2}{3}*\frac{2}{3} }_{=\frac{4}{9}}+ \underbrace{\frac{1}{3}*\frac{4}{3^2} }_{=\frac{4}{27}}+ \underbrace{\frac{2}{3}*\frac{4}{3^2} }_{=\frac{8}{27}}+ \underbrace{ \frac{1}{3}* \frac{8}{3^3}}_{=\frac{8}{81}}+ \underbrace{\frac{2}{3}*\frac{8}{3^3}}_{=\frac{16}{81}}+\dots \ \\\\\\

= 1+ ( \underbrace{\frac{1}{3} + \frac{2}{3} }_{=1} )+ ( \underbrace{\frac{1}{3} + \frac{2}{3} }_{=1} )*\frac{2}{3}}+ ( \underbrace{\frac{1}{3} + \frac{2}{3} }_{=1} )*\frac{4}{3^2}}+ ( \underbrace{\frac{1}{3} + \frac{2}{3} }_{=1} )*\frac{8}{3^3}}+\dots \ \\\\\\

= 1+ ( \underbrace{\frac{1}{3} + \frac{2}{3} }_{=1} )+ ( \underbrace{\frac{1}{3} + \frac{2}{3} }_{=1} )*\frac{2}{3}}+ ( \underbrace{\frac{1}{3} + \frac{2}{3} }_{=1} )*\frac{2^2}{3^2}}+ ( \underbrace{\frac{1}{3} + \frac{2}{3} }_{=1} )*\frac{2^3}{3^3}}+\dots \ \\\\\\

= 1+ 1+ \frac{2}{3}}+ \frac{2^2}{3^2}}+ \frac{2^3}{3^3}}+\dots \ \\\\\\s=1+1*( \frac{2}{3} ) ^0+1*(\frac{2}{3})^1+1*(\frac{2}{3})^2+1*(\frac{2}{3})^3+1*(\frac{2}{3})^4+\dots \

 
Melody  Jan 26, 2015
 #58
avatar+90192 
0

Using Vectors

 

\vec{V_1}

$$\vec{v_1}$$

 

Binomials

\displaystyle\binom{5}{i}

 

$$\displaystyle\binom{5}{i}$$

 

\displaystyle \sum \limits_{i=0}^{\textcolor[rgb]{1,0,0}{5-1}} *(-1)^i*\binom{5}{i}* (5-i)^3 \hspace {15}| \hspace {15} \Text {N=5 \; k=3} \\\

$$\displaystyle \sum \limits_{i=0}^{\textcolor[rgb]{1,0,0}{5-1}} *(-1)^i*\binom{5}{i}* (5-i)^3 \hspace{15pt}| \hspace{15pt} \Text {N=5 \; k=3} \\\$$

 

Partial Derivatives

\dfrac{\partial z}{\partial x}

$$\dfrac{\partial z}{\partial x} =0.3x^{-0.7}y^{0.5}$$

 
Melody  Feb 19, 2015
 #59
avatar+4663 
+8

I want to learn this!

 
MathsGod1  Mar 28, 2015
 #60
avatar+90192 
0

Good MG

I want you to learn it too :)

 
Melody  Apr 5, 2015
 #61
avatar+90192 
0

Nauseated's code

http://web2.0calc.com/questions/a-3-2-5-x-b-10-2-c-20-d-10#r4

Some of it isn't working properly (it did fro Nauseated)  - I have changed some of it a bit but it didn't all work to start with and it still doesn't now!  NEEDS WORK

 

$$\Displaystyle \text {Basic form} \\\Displaystyle x^{3^4}\\ \Displaystyle \text {This format will work for more complex forms}\\\Displaystyle \begin{Large} {X^{2^4^{^6^}^{^8^}^{^{Etc}}}\end{Large}\\\\\text {Here are some other presentation forms that may be useful.}\\$$

 

 

$$\Displaystyle \text {Basic form} \\\Displaystyle x^{3^4}\\ \Displaystyle \text {This format will work for more complex forms}\\\Displaystyle \begin{Large} {X^{2^4^{^6^}^{^8^}^{^{Etc}}}\end{Large}\\\\\text {Here are some other presentation forms that may be useful.}\\$$

------------------------------------------------

\Displaystyle \text {Basic form} \\\Displaystyle x^{3^4}\\

\Displaystyle \text {This format will work for more complex forms}\\

\Displaystyle \begin{Large} {X^{2^4^{^6^}^{^8^}^{^{Etc}}}\end{Large}\\\\

\text {Here are some other presentation forms that may be useful.}\\ 

------------------------------------------------

 

 

$$\noindent \sqrt[\leftroot{-2}\uproot{4} 7]9876 \leftarrow \Text${Use noindent to prevent pesky indentation}\\\\$$


\noindent \sqrt[\leftroot{-2}\uproot{4} 7]9876 \leftarrow \Text${Use noindent to prevent pesky indentation}\\\\

 

$$noindent \sqrt[\leftroot{-2}\uproot{4} 7]{9876}\leftarrow \Text${Note the root function covers all the numbers here. Compare the codes to see why} \\\\$$

noindent \sqrt[\leftroot{-2}\uproot{4} 7]{9876}\leftarrow \Text${Note the root function covers all the numbers here. Compare the codes to see why} \\\\

 

\Text{Here's a method to nest "n-root" and align the "n" using "leftroot" and "uproot"}\\\\\

$$\sqrt[\leftroot{-2}\uproot{4} 7]{\sqrt[\leftroot{-2}\uproot{4} 5]{ (\sqrt[\leftroot{-2}\uproot{2} 9]{x^2})^3}} = Z \\\\
\Text{Note the subtle difference in the exponent of 3}\\\\$$

\sqrt[\leftroot{-2}\uproot{4} 7]{\sqrt[\leftroot{-2}\uproot{4} 5]{ (\sqrt[\leftroot{-2}\uproot{2} 9]{x^2})^3}} = Z \\\\

\Text{Note the subtle difference in the exponent of 3}\\\

\sqrt[\leftroot{-2}\uproot{4} 7]{\sqrt[\leftroot{-2}\uproot{4} 5]{ (\sqrt[\leftroot{-2}\uproot{2} 9]{x^2})^{^3}}} = Z \\\ \Text{One great thing about writing great LaTex presentations: You can be dumber than a box of rocks and still look intelligent --at least for awhile. I have been getting away with it for years . . . .} 

 
Melody  Apr 13, 2015
 #62
avatar+90192 
+3

Hi Nauseated,

I want to compare some of what you have done to how I would do it.

 

NAUSEATED'S    CODE

$$\noindent \sqrt[\leftroot{-2}\uproot{4} 7]9876 \leftarrow \Text${Use noindent to prevent pesky indentation}\\\\$$

\noindent \sqrt[\leftroot{-2}\uproot{4} 7]9876 \leftarrow \Text${Use noindent to prevent pesky indentation}\\\\

 

$$\noindent \sqrt[\leftroot{-2}\uproot{4} 7]{9876}\leftarrow \Text${Note the root function covers all the numbers here. Compare the codes to see why} \\\\$$

noindent \sqrt[\leftroot{-2}\uproot{4} 7]{9876}\leftarrow \Text${Note the root function covers all the numbers here. Compare the codes to see why} \\\\

 

MELODY'S  CODE

$$\\\sqrt[7]{9876}\leftarrow $No indent because of the 2 backslashes $$$

\\\sqrt[7]{9876}\leftarrow $No indent because of the 2 backslashes $

If I  wanted just the 9 under the square root I would  only put the 9 in the parentheses

 

Note: I have never seen Text${...   }  used before.  I either use $...   $   

which Alan discovered,   OR I use   \mbox{....} 

It is good to know of alternatives because sometimes they work better under different circumstances. :)

 

------------------------------------------

 

NAUSEATED'S  CODE

 

$$\Displaystyle \text {Basic form} \\\Displaystyle x^{3^4}\\
\Displaystyle \text {This format will work for more complex forms}\\
\Displaystyle \begin{Large} {X^{2^4^{^6^}^{^8^}^{^{Etc}}}\end{Large}\\\\
\text {Here are some other presentation forms that may be useful.}\\$$

 

\Displaystyle \text {Basic form} \\\Displaystyle x^{3^4}\\

\Displaystyle \text {This format will work for more complex forms}\\

\Displaystyle \begin{Large} {X^{2^4^{^6^}^{^8^}^{^{Etc}}}\end{Large}\\\\

\text {Here are some other presentation forms that may be useful.}\\ 

 

This last one is of great interest to me.  Thanks Nauseated :)

 

-------------------------------------------------

 

$$\sqrt[\leftroot{-2}\uproot{4} 7]{\sqrt[\leftroot{-2}\uproot{4} 5]{ (\sqrt[\leftroot{-2}\uproot{2} 9]{x^2})^3}} = Z \\\\
\Text${Note the subtle difference in the exponent of 3}\\\
\sqrt[\leftroot{-2}\uproot{4} 7]{\sqrt[\leftroot{-2}\uproot{4} 5]{ (\sqrt[\leftroot{-2}\uproot{2} 9]{x^2})^{^3}}} = Z \\\$$

 

 

\sqrt[\leftroot{-2}\uproot{4} 7]{\sqrt[\leftroot{-2}\uproot{4} 5]{ (\sqrt[\leftroot{-2}\uproot{2} 9]{x^2})^3}} = Z \\\\          

NOTE: for this one the 3 is the same height as the 2. 

\Text${Note the subtle difference in the exponent of 3}\\\

\sqrt[\leftroot{-2}\uproot{4} 7]{\sqrt[\leftroot{-2}\uproot{4} 5]{ (\sqrt[\leftroot{-2}\uproot{2} 9]{x^2})^{^3}}} = Z \\\    

NOTE: for this one the 3 is higher than the 2

 

Nauseated - I have a question.  You seem to use 2 backslashes quite often and I am wondering why.

2 will give you a new line and 1 usually gives me a $ sign but this does not seem to be happening for you.

So I am a bit confused. 

 

WHY IS MY LATEX NOT DISLPLAYING - SOMETIMES IT DOES - SOMETIMES IT DOESN'T.

IT IS FINE WHILE I WORK ON THE POST THEN THE FINISHED POST SOMETIMES DOES NOT DISPLAY PROPERLY.

WEIRD!!!

 
Melody  Apr 13, 2015
 #63
avatar+90192 
0

A nice table drawn by Heureka :)

 

\small{\begin{array}{c|c}\text{nat\"urliche Zahl} & \text{Dreierpotenz} \\

\hline\\(0) & 0^3 \\1 & 1^3 \\2 & 2^3 \\3 & 3^3 \\4 & 4^3 \\5 & 5^3 \\\cdots & \cdots \\n & n^3 \\\\\hline\end{array}}

 

$$\small{\begin{array}{c|c}\text{nat\"urliche Zahl} & \text{Dreierpotenz} \\
\hline\\(0) & 0^3 \\1 & 1^3 \\2 & 2^3 \\3 & 3^3 \\4 & 4^3 \\5 & 5^3 \\\cdots & \cdots \\n & n^3 \\\\\hline\end{array}}$$

 
Melody  Apr 16, 2015
 #68
avatar+90192 
0

This is an inital learning thread for LaTex.       Thanks MathsGod1 for initiating it :)

http://web2.0calc.com/questions/latex-form

 

MG I whited out some of the other bits that you put here.  I want it to stay an information thread.

I know it is very messy by I still reference it constantly.  

I am thinking that if you get good at LaTex maybe one day you will clean this thread up for us and we will have a nice neat new thread :)

By the way, LaTex is pronounced    Lay Tec

 
Melody  May 3, 2015
 #69
avatar+90192 
0

Different \dot commands.

Heureka has given us a display of them - there is a lot.     Thanks Heureka

http://web2.0calc.com/questions/algebra_545#r4

 

Vector and Matrix coding by Heureka      (7/5/15)

http://web2.0calc.com/questions/if-three-points-of-a-parallelogram-are-located-at-1-0-4-3-and-5-2-what-is-the-fourth-coordinate#r4

 
Melody  May 7, 2015
 #70
avatar+90192 
0

 This is Heureka's coding      

 from here

http://web2.0calc.com/questions/in-the-figure-below-ab-ac-50-ad-52-nbsp-and-bc-28-nbsp-determine-cd#r5

 

$$\small{\text{$\begin{array}{l|l}A=\sqrt{s\cdot (s-a)\cdot(s-b)\cdot (s-c)} & \qquad \overline{AB} = a=50, ~ \overline{AC} = b=50,~ \overline{AD} =c=28\\\\& \qquad s = \frac{a+b+c}{2}=\frac{50+50+28}{2}=\frac{128}{2}=64 \\A=\sqrt{s\cdot (s-50)\cdot(s-50)\cdot (s-28)} \\A= \sqrt{64\cdot (64-50)\cdot(64-50)\cdot (64-28)} \\ A= \sqrt{64\cdot 14 \cdot 14 \cdot 36} \\A= \sqrt{8^2\cdot 14^2 \cdot 6^2} \\ A= 8\cdot 14 \cdot 6 \\ A=672\end{array}$}}$$

 

\small{\text{$\begin{array}{l|l}A=\sqrt{s\cdot (s-a)\cdot(s-b)\cdot (s-c)} & \qquad \overline{AB} = a=50, ~ \overline{AC} = b=50,~ \overline{AD} =c=28\\\\

& \qquad s = \frac{a+b+c}{2}=\frac{50+50+28}{2}=\frac{128}{2}=64 \\

A=\sqrt{s\cdot (s-50)\cdot(s-50)\cdot (s-28)} \\

A= \sqrt{64\cdot (64-50)\cdot(64-50)\cdot (64-28)} \\

A= \sqrt{64\cdot 14 \cdot 14 \cdot 36} \\

A= \sqrt{8^2\cdot 14^2 \cdot 6^2} \\

A= 8\cdot 14 \cdot 6 \\

A=672\end{array}$}}

 

-------------------------------

 

What is  \text{$   for?   What does it do, I see no text.

 

big         \small{mathe-Modus}}     :             $$\small{mathe-Modus}}$$

small      \small{\text{text-Modus}} :            $$\small{\text{text-Modus}}$$

small - italic    \small{\text{$mathe-Modus-italic$}} :     $$\small{\text{$mathe-Modus-italic$}}$$

 
Melody  May 7, 2015
 #71
avatar+90192 
+3

BOXES FROM NAUSEATED      18/5/15

Original         http://web2.0calc.com/questions/latex-form-part-2#r52

 

\setlength{\fboxsep}{20pt}\fbox{Hi Melody. Here are a few ways to do "quick" boxes} \\\\

$$\setlength{\fboxsep}{20pt}\fbox{Hi Melody. Here are a few ways to do "quick" boxes} \\\\$$

\setlength{\fboxsep}{20pt}\fbox{} \\\\

\setlength{\fboxsep}{15pt}\fbox{} \\\\

$$\setlength{\fboxsep}{20pt}\fbox{}\\\\
setlength{\fboxsep}{15pt}\fbox{} \\\\$$

 

\setlength{\fboxsep}{10pt}\fbox{} \\\\

setlength{\fboxsep}{5pt}\fbox{} \\\\

$$\setlength{\fboxsep}{10pt}\fbox{} \\\\
setlength{\fboxsep}{5pt}\fbox{} \\\\$$

 

\setlength{\fboxsep}{20pt} \fbox{ } \leftarrow ${Comds are the same, except for} \\\\

$$\setlength{\fboxsep}{20pt} \fbox{ } \leftarrow ${Comds are the same, except for} \\\\$$

 

\setlength{\fboxsep}{15pt}\fbox{ } \leftarrow ${ one space for additional [x]pt width}

$$\setlength{\fboxsep}{15pt}\fbox{ } \leftarrow ${ one space for additional [x]pt width}$$

 

\setlength{\fboxsep}{10pt}\fbox{ } \\\\

setlength{\fboxsep}{5pt}\fbox{ } \\\\

$$\setlength{\fboxsep}{10pt}\fbox{ } \\\\
setlength{\fboxsep}{5pt}\fbox{ } \\\\$$

 

\setlength{\fboxrule}{3pt}\setlength{\fboxsep}{6pt} \fbox{ } \leftarrow ${ fboxrule Comds affect border boldness}\\\\

$$\setlength{\fboxrule}{3pt}\setlength{\fboxsep}{6pt} \fbox{ } \leftarrow ${ fboxrule Comds affect border boldness}\\\\$$

 

\setlength{\fboxrule}{5pt}\setlength{\fboxsep}{15pt} \fbox{? } \leftarrow ${ Text (if used) is Center justified } \\\\

$$\setlength{\fboxrule}{5pt}\setlength{\fboxsep}{15pt} \fbox{? } \leftarrow ${ Text (if used) is Center justified } \\\\$$

 

\setlength{\fboxrule}{3pt}\setlength{\fboxsep}{15pt} \fbox{ End of Examples from }

$$\setlength{\fboxrule}{3pt}\setlength{\fboxsep}{15pt} \fbox{ End of Examples from }$$

 

\setlength{\fboxrule}{5pt}\setlength{\fboxsep}{20pt} \fbox{ Your friendly neighborhood Troll }

$$\setlength{\fboxrule}{5pt}\setlength{\fboxsep}{20pt} \fbox{ Your friendly neighborhood Troll }$$

 

 

-------------------------------------------------------------------------------------------------------------

 

 

$$\setlength{\fboxsep}{20pt}\fbox{Hi Melody. Here are a few ways to do "quick" boxes} \\\\
\setlength{\fboxsep}{20pt}\fbox{} \\\\
\setlength{\fboxsep}{15pt}\fbox{} \\\\
\setlength{\fboxsep}{10pt}\fbox{} \\\\
\setlength{\fboxsep}{5pt}\fbox{} \\\\
\setlength{\fboxsep}{20pt} \fbox{ } \leftarrow ${Comds are the same, except for} \\\\
\setlength{\fboxsep}{15pt}\fbox{ } \leftarrow ${ one space for additional [x]pt width} \setlength{\fboxsep}{10pt}\fbox{ } \\
\setlength{\fboxsep}{5pt}\fbox{ } \\\\
setlength{\fboxrule}{3pt}\setlength{\fboxsep}{6pt} \fbox{ } \leftarrow ${ fboxrule Comds affect border boldness}\\\\
\setlength{\fboxrule}{5pt}\setlength{\fboxsep}{15pt} \fbox{? } \leftarrow ${ Text (if used) is Center justified } \\\\
\setlength{\fboxrule}{3pt}\setlength{\fboxsep}{15pt} \fbox{ End of Examples from } \setlength{\fboxrule}{5pt}\setlength{\fboxsep}{20pt} \fbox{ Your friendly neighborhood Troll }$$

 
Melody  May 17, 2015
 #72
avatar+1278 
0

$$$
\root 3 \of {x \root 3 \of {x \root 3 \of {x \sqrt{x}}}}
$$$

 
AWESOMEEE  Jun 30, 2015
 #73
avatar+1278 
+1

this is made my latex:

$$$\LaTeX$$$

 
AWESOMEEE  Jun 30, 2015
 #74
avatar+90192 
0

Heureka 3/8/15

http://web2.0calc.com/questions/how-come-30-99-61-100-is-divisible-by-31#r4

 

\small{\text{$30 \equiv - 1 \pmod {31}$}}\\

\small{\text{ and $61 \equiv - 1 \pmod {31}$}}\\\\

\small{\text{$(-1)^{99} + (-1)^{100} \stackrel{?}\equiv 0 \pmod{31}$}}\\\\

\small{\text{$-1 + 1 \equiv 0 \pmod{31}$}}\\\\

 

OUTPUT

$$\small{\text{$30 \equiv - 1 \pmod {31}$}}\\
\small{\text{ and $61 \equiv - 1 \pmod {31}$}}\\\\
\small{\text{$(-1)^{99} + (-1)^{100} \stackrel{?}\equiv 0 \pmod{31}$}}\\\\
\small{\text{$-1 + 1 \equiv 0 \pmod{31}$}}\\\\$$

------------------------------------------

 

\stackrel{?}\equiv

OUTPUT

$$\stackrel{?}\equiv$$

 
Melody  Aug 4, 2015
 #71
avatar+188 
0

$$ \underbrace{a+\overbrace{b+\cdots}^{{}=t}+z} _{\mathrm{total}} ~~ a+{\overbrace{b+\cdots}}^{126}+z $$

 

 

LaTeX coding is FUN!

 
NinjaDJ109  Sep 3, 2015
 #72
avatar+90192 
0

A great trig diagram from Heureka.        laugh                         26th June 2016

 

http://web2.0calc.com/questions/sine-law_1

 
Melody  May 26, 2016
 #73
avatar+90192 
0

Thanks to MaxWong                                 Cards Suites  

 

A card is drawn at random from a pack of 52 playing cards(\(\clubsuit \diamondsuit \heartsuit \spadesuit\))

(without Jokers). What is the probability of getting a card which is neither a 6 nor a ?

 

\clubsuit \diamondsuit \heartsuit \spadesuit

 
Melody  Jul 2, 2016
 #74
avatar+90192 
0

 

More symbols here  :))   Thanks Max

http://web2.0calc.com/questions/off-topic-just-trying-to-make-a-picture

 

There are many really helpful symbols here

 

 http://omega.albany.edu:8008/Symbols.html

 

 

\dagger              \(\dagger   \)  

 

\S                    ยง

 

\infty               \(\infty   \)    

 

\cdot \space \cdot \\ \smile               \(\cdot \space \cdot \\ \smile          \)

 

 

\cdot \space \cdot \\ \frown             \(\cdot \space \cdot \\ \frown \)  

 
Melody  Jul 2, 2016
 #76
avatar+90192 
+15

A page of Latex explanation contributed by MaxWong.  Thanks Max    

 

http://web2.0calc.com/questions/a-post-of-latex

 
Melody  Jul 7, 2016
 #77
avatar+6794 
+5

Just discovered how to escape from Math mode of LaTeX while the above method won't work for me(The $ one)

\text{}

\(\text{2^5}\)\text{2^5}

\(\text{The above one have completely escaped from math mode, so is this one}\)

\text{The above one have completely escaped from math mode, so is this one}

 
MaxWong  Jul 16, 2016
 #79
avatar+6794 
+5

\(\begin{align*}2x - 5y &= 8\\3x + 9y &= -12\end{align*}\)

 

Hey look Mom, I did align XDDDDD

 
MaxWong  Aug 21, 2016
 #80
avatar+6794 
+5

Right click my LaTeX and move the cursor to Show Math As, then choose Tex commands, you can see how I did the LaTeX.

 
MaxWong  Aug 21, 2016
 #81
avatar+6794 
+5

My mom is not on this forum though XD haven't even registered but she does have great maths skills.

 
MaxWong  Aug 22, 2016
 #82
avatar+90192 
+5

ALIGN

This is very interesting Max, thanks for showing me.

I used to use align all the time but it did not work here -

There are many different versions of Latex - each one seems to have its own limitations and peculiarities. :)

 

You are right    IT DOES WORK!

It seems you cannot add any more latex after you finish the alignment.

That is a pity but most times it would be convenient enough just to close it and start a new latex insert.

 

You can use this with more than one alignment - you probably know that.  :)

 

\begin{align*}2x - 5y &=&  8&\qquad \mbox(1)

\\3x + 9y &=&-12&\qquad \mbox(2)\end{align*}

 

\(\begin{align*}2x - 5y &=& 8&\qquad \mbox(1) \\3x + 9y &=&-12&\qquad \mbox(2)\end{align*}\)

 

Now I need to remember to use this   laugh

 

PS   I am sure your Mum is a very fine mathematician :))

 
Melody  Aug 22, 2016
 #83
avatar+6794 
0

\(\text{My align looks bad. I am going to make it look better.}\\ \begin{align*}2x&-5y&=&\quad8\\3x&+9y&=&\;-12\end{align*}\)

 
MaxWong  Aug 22, 2016
 #84
avatar+6794 
0

By the way I'd like to use array more though :P

 
MaxWong  Aug 31, 2016
 #85
avatar+90192 
0

This little gem is  Heureka's  -  thanks Heureka :)     

http://web2.0calc.com/questions/statistics_427#r2

 

 

\begin{array}{|lcll|} \hline \text{Set students } ~ s &=& 62 \\ \text{Set freshman } ~ f &=& 32 \\ \text{Set economics major} ~ e_m &=& 32 \\ \text{Set neither} ~ n &=& 12 \\\\ \text{both a freshman and economics major } &=& f+e_m+n -s \\ &=& 32+32+12-62 \\ &=& 14 \\\\ \text{the probablity is the student is both a freshman and economics major } &=& \frac{f+e_m+n -s}{s} \\ &=& \frac{14}{62} \\ &=& \frac{7}{31} \quad ( 22.58\ \%)\\ \hline \end{array}

 

\(\begin{array}{|lcll|} \hline \text{Set students } ~ s &=& 62 \\ \text{Set freshman } ~ f &=& 32 \\ \text{Set economics major} ~ e_m &=& 32 \\ \text{Set neither} ~ n &=& 12 \\\\ \text{both a freshman and economics major } &=& f+e_m+n -s \\ &=& 32+32+12-62 \\ &=& 14 \\\\ \text{the probablity is the student is both a freshman and economics major } &=& \frac{f+e_m+n -s}{s} \\ &=& \frac{14}{62} \\ &=& \frac{7}{31} \quad ( 22.58\ \%)\\ \hline \end{array}\)

 
Melody  Oct 19, 2016
 #86
avatar+90192 
0

ALIGNING  FOR  EQUATIONS      (Thanks Heureka)

 

http://web2.0calc.com/questions/logarithm_26766#r5

 

\begin{array} {rcl}... &=&...\end{array}
left side:         r = right aligned
Second field:   c = center
right side:          l = left aligned

 
Melody  Nov 9, 2016
 #87
avatar+90192 
0

BINOMIALS

 

\binom30^2 + \binom31^2 + \binom32^2 + \binom33^2

 

\(\binom30^2 + \binom31^2 + \binom32^2 + \binom33^2\)

 

 

\binom{n}{0}^2 + \binom{n}{1}^2 + \cdots + \binom{n}{n}^2 = \text{ something}.

 

\(\binom{n}{0}^2 + \binom{n}{1}^2 + \cdots + \binom{n}{n}^2 = \text{ something}.\)

 

----------------------------------------------------------------------------------------------------------

 

FRACTIONS

 

\cfrac   and    \dfrac

 

 

 

\cfrac{1}{1 + \cfrac{1}{2 + \cfrac{1}{1 + \cfrac{1}{2 + \dotsb}}}}

 

\(\cfrac{1}{1 + \cfrac{1}{2 + \cfrac{1}{1 + \cfrac{1}{2 + \dotsb}}}}\)

 

 

More here

http://tex.stackexchange.com/questions/59747/proper-display-of-fractions

 

On that reference site there is also a \dfrac{}{} used.

 

2-\frac{2}{1-\left(\frac{2}{2-\frac{2}{x^2}}\right)}\quad

2-\dfrac{2}{1-\left(\dfrac{2}{2-\dfrac{2}{x^2}}\right)}\quad

2-\cfrac{2}{1-\left(\cfrac{2}{2-\cfrac{2}{x^2}}\right)}\quad

2-\dfrac{2}{1-\left(\cfrac{2}{2-\dfrac{2}{x^2}}\right)}

 

\(2-\frac{2}{1-\left(\frac{2}{2-\frac{2}{x^2}}\right)}\quad 2-\dfrac{2}{1-\left(\dfrac{2}{2-\dfrac{2}{x^2}}\right)}\quad 2-\cfrac{2}{1-\left(\cfrac{2}{2-\cfrac{2}{x^2}}\right)}\quad 2-\dfrac{2}{1-\left(\cfrac{2}{2-\dfrac{2}{x^2}}\right)}\)

 

 

Mmm,   I can't see the difference between the cfrac and the dfrac     :indecision

 

 

 

*

 
Melody  Dec 3, 2016
 #88
avatar+6794 
0

\cfrac is slightly longer than \dfrac

 
MaxWong  Jan 5, 2017
 #89
avatar+90192 
0

 

How to put different types of brackets around matrices - or no brackets at all !

 

http://web2.0calc.com/questions/test-2#r2

 

http://www.sascha-frank.com/Faq/matrices.html

 

\text{This text } \begin{smallmatrix} 2\\ 3\\ \end{smallmatrix} \;\;\text{is only for showing.}

 

\(\text{This text } \begin{smallmatrix} 2\\ 3\\ \end{smallmatrix} \;\;\text{is only for showing.}\)

 
Melody  Feb 11, 2017
 #90
avatar+90192 
0

GingerAle's LaTex in a box

 

\begin{array}{|lll|} \hline &(h-16t^2) - (h-16(t+1.6)^2) &=& 182ft&\\

&-16t^2+16 (t+1.6)^2&=&182\\ &51.2t+40.96&=&182\\

&51.2t&=&141.04\\

&t&=&2.7546875\\ \text { }\\

&16(2.7546875)^2 &=& 121.4 \text{ft above observation floor. }\\

&\dfrac{121.4}{13}& =& 9.3 \text{ Floors above observation floor. }\\

&14+9 &=& 23 \text { The bucket fell from the }23^{rd} \text {floor }\\

\hline \end{array}

 

\(\begin{array}{|lll|} \hline &(h-16t^2) - (h-16(t+1.6)^2) &=& 182ft&\\ &-16t^2+16 (t+1.6)^2&=&182\\ &51.2t+40.96&=&182\\ &51.2t&=&141.04\\ &t&=&2.7546875\\ \text { }\\ &16(2.7546875)^2 &=& 121.4 \text{ft above observation floor. }\\ &\dfrac{121.4}{13}& =& 9.3 \text{ Floors above observation floor. }\\ &14+9 &=& 23 \text { The bucket fell from the }23^{rd} \text {floor }\\ \hline \end{array}\)

 
Melody  Jul 23, 2017
 #91
avatar+90192 
0

Why can't I see this in the sticky notes?

 
Melody  Sep 21, 2017

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