Give this one a go if you're so inclined. A clever sub will do it.
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Originally Posted by galactus Give this one a go if you're so inclined. A clever sub will do it. I thought I had seen this before...and I searched, and was correct!
I remember working on this to no avail...plus, it turned out to be beyond the scope of what I knew anyway... >_>
Here's another way.
An alternative sub is to let
Then, we get:
Then, in the inner integral, let t=uw to get the product of two known integrals.
And you should get:
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