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Homework Statement
(e^-x)/(1+e^-x)dx
Homework Equations
Integral of e^x function
The Attempt at a Solution
I am completely lost with the problem, the fact that it is e^-x and not e^x has me stupped as well as the division.
Well, does it work?so if I let u=1+e^-x?
When you do get back to it, answer this: What is [itex]du[/itex] when [itex]u=1+e^{-x}[/itex]?I still cant figure it out so I gave up and will try again later