Need help on integral question

[matchafluff]

I'm supposed to solve with u-sub, but I've tried nearly every u I can think of, no dice.

[math]\int \frac{e^{18x}}{1+e^{6x}}dx[/math]

 

[Deleted member 4993]

I'm supposed to solve with u-sub, but I've tried nearly every u I can think of, no dice.

[math]\int \frac{e^{18x}}{1+e^{6x}}dx[/math]

Please show us some of the u-subs you have tried - along with how those did not work.

Please show us what you have tried and exactly where you are stuck.

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Please share your work/thoughts about this problem

 

[Steven G]

Try dividing.

 

[skeeter]

[imath]\dfrac{e^{3t}}{e^t +1} = e^{2t} -e^t + \dfrac{e^t}{e^t +1} [/imath]