Question is to calculate the integral

This is what I have done, however looks to be incorrect.

I let

and so

and

However answer is given as

Can someone tell me the errors of my way. Thanks

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- Oct 5th 2008, 10:44 PMCrakaintegration by substitution xe^x^2
Question is to calculate the integral

This is what I have done, however looks to be incorrect.

I let

and so

and

However answer is given as

Can someone tell me the errors of my way. Thanks - Oct 5th 2008, 11:48 PMo_O
You don't get with that substitution.

Use:

Note that:

So: