Integral of (e^x)/(e^(2x)+3) dx

U-substitution and integration by parts doesn't seem to be working for me...:(

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- Feb 14th 2009, 06:24 PMpianopianoA tricky integral...
Integral of (e^x)/(e^(2x)+3) dx

U-substitution and integration by parts doesn't seem to be working for me...:( - Feb 14th 2009, 06:34 PMKrizalid
There's no much here, just put and the remaining integral is an arctangent.

- Feb 14th 2009, 07:17 PMpianopiano
Can you explain that substitution in a little more detail? I'm not sure how you would use it. Our class isn't going over trigonometric substitutions, but there it is in one of our improper integral problems...

- Feb 14th 2009, 07:32 PMmr fantastic
- Feb 14th 2009, 07:37 PMKrizalid
Ahhh, yes, that's the substitution, my head is in other place. :(