(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

So, I have to integrate the following expression:

(e^7x)/(e^(14x) + 9)dx

2. Relevant equations

We are doing the section on 'integrating by u-substitution' right now, so that might help in finding a solution...

3. The attempt at a solution

So, I tried a bunch of stuff - I tried u=7x, u=e^7x, u=14x, u=e^14x, u=x, etc. etc. and I can't get the right answer!!! I have been working on this problem for over an hour and am on the verge of tears!

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# Homework Help: Integrals involving 'e'

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