You can see that x is (with some constant) the derivative of
So let and
I've having trouble integrating this expression by parts:
The first expression is the one I want to solve by using the second equation.
I've tried solving it by parts but I can't seem to impliment the limits.
Just so you know, the answer is:
If you want another method... : you can recognize the Gamma function (http://en.wikipedia.org/wiki/Gamma_function), by letting .