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Which way is correct? 

 

 

 

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xvxvxv  Nov 14, 2015

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 #2
avatar+26329 
+10

Note:

 

logarithms

.

Alan  Nov 14, 2015
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6+0 Answers

 #1
avatar+91038 
+8

Hi 315,

 

This is what Wolfram Alpha says

 

 

 

Melody  Nov 14, 2015
 #2
avatar+26329 
+10
Best Answer

Note:

 

logarithms

.

Alan  Nov 14, 2015
 #3
avatar+1828 
+5

Thank you Melody and Alan . 

xvxvxv  Nov 29, 2015
 #4
avatar+91038 
0

Hi Alan and others,

 

I have only just come back to this question to take a proper look.

Prior to watching you one the forum I never treated calculus dy and dx so much like normal algebra.

To me dy/dx was glued together with super glue.

I guess I understood better when I was studying at university but I do not remember that.

 

It all makes such perfect sense when you show me how to do things.  

Working through this with you and WolframAlpha as a guide made it so easy.

 BUT, if I come back in a fortninght and try to do it myself I won't be able to.

Isn't that sad. :)

 

Students often tell me that I do not understand their learning problems, but you see I really do!    angry

Melody  Nov 29, 2015
 #5
avatar+26329 
+5

You might prefer the following Melody:

 

integration

Strictly, dy and dx should be glued together, but we science/engineering types often take liberties with the mathematics!!

Alan  Nov 29, 2015
 #6
avatar+91038 
0

Thanks Alan,

 

YES, that is exactly how I did do it - I was looking at yours and at Wolfram|Alpha.

 

But it still started by dividing everything by dx.      :/

Melody  Nov 29, 2015

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