Derek Wan

Posted on Saturday, 11 October, 2003 - 11:10 am:

Would someone kindly teach me how to integrate

\sqrt{x} e^{\sqrt{x}}

with respect to

x

Thanks, Derek

Andre Rzym

Posted on Saturday, 11 October, 2003 - 11:21 am:

Substitute

y = \sqrt{x}

, then use integration by parts.

Let me know how you get on,

Andre

Derek Wan

Posted on Sunday, 12 October, 2003 - 11:25 am:

Wow it works brilliantly!

Originally I was confused because $dy / dx = 1 / 2 \sqrt{x}$ and that wasn't anything immediately recognisable. Now I realise $dx = dx / dy dy$ where $dx / dy = 2 \sqrt{x}$ .

Thanks!