Please Help me!!!!

15
4 * Σ 3 ^{(n -1)} * (-1) ^(n-1)
n = 4

I can't get this to display correctly...The "15" is supposed to be directly over the summa sign and the "n = 4" is supposed to be directly under it....I think you get the idea......

CPhill:

15
4 * Σ 3^{(n -1)} * (-1)^(n-1)
n = 4

I can't get this to display correctly...The "15" is supposed to be directly over the summa sign and the "n = 4" is supposed to be directly under it....I think you get the idea......

Hi Chris,
What have you used to try and display this. Maybe someone can help you to display it properly and then we may all know for next time.
Melody.

Clipboard01.jpg

is this what you mean?

Hi Rom,
I want you to display the code that you have used please. Can you take a snip of it please?

I keep meaning to write a proper LaTex post. i just haven't gotten around to it yet.
I often refer to the Latex cookbook but it is not very comprehensive and finding code for obscure things can be quite difficult and time comsuming.
I thought eventually we could build up our own LaTex cookbook.
We would have the code on one side and the display on the other. I thought we could give it a go anyway. It is just time consuming to set up and to keep managing.
Anyway, it is a thought.

hi Chris,
It doesn't look like you used Latex. Did you use MathType or something differerent again.

This is the LaTex code that i used. It didn't display properly if I didn't use display mode (with $$)
I didn't need to use all of those packages, they are just a part of quick start with Texmaker, which is the version of LaTex that I use.

Latex - sum of display.JPG