# Math Help - Calculus indefinite integral problem

1. ## Calculus indefinite integral problem

Hey, I've been stuck on this and cant get it right. Any help would be great, thanks.

Problem is in this picture:
http://img374.imageshack.us/img374/8483/37541028ae0.jpg

2. $\frac{d}{dx} \sec^{-1}(u) = \frac{u'}{u\sqrt{u^2-1}}$