This came up at work yesterday, and neither of us could remember how to do it. I pulled out my copy of Thomas and couldn't find it, though I did find a statement at the beginning of the "Methods of Integration" chapter that it would be dealt with later and would involve infinite series.
Can someone remind me, or point me toward an online reference? Thanks!
P.S. We actually want the definite integral from x=0 to infinity.
And again, it's not the answer but the method that we're looking for.