integration

[philipc]

just wonder if someone could help me solve this integral,
thanks

(e^-2x) / (1+e^-x)

[Chen]

Can you integrate (t2) / (1 + t)? I'm guessing that's how you should do it, since I don't really know... :tongue:

[faust9]

just wonder if someone could help me solve this integral,
thanks

(e^-2x) / (1+e^-x)

Do some algebraic manipulation of the original problem. If you do, the problem wil reduce to a form that allows U substitution.

[TMcCloskey]

I think Chen was on the right track, ie, use substitution t = e^-x
but don't forget about dx -- should come to a much simpler integration

[thermodynamicaldude]

k..substitute u = (1 + e^-x)......then find du.....work from there....and you should get the correct answer.....
....hint.....remember that u-1 = e^-x....