Hello!!
I am trying to understand how to calculate the following integral:
I already know that the answer is
but why?
Can anyone help me on this?
Thanks a lot in advance...
It's okay.
You know from the geometric series from there you can find the sum for
After the interchange between the sum & the integral, yields the integral which can be solved by substitution you'll end up with the Gamma Function. Finally you'll get the last sum.