# Math Help - integral

1. ## integral

Hello

just need som tips on how to integrate this x/(1-x^2)^1,5

thanks

2. $\int\frac{x}{\sqrt{1-x^{2}}}dx$

Let $u=1-x^{2}, \;\ du=-2xdx, \;\ \frac{-1}{2}du=xdx$

Then, you get:

$\frac{-1}{2}\int\frac{1}{\sqrt{u}}du$

Now, integrate and resub.

3. Hello,

Hem...this is 1.5, right or not ?

4. Originally Posted by Moo

Hem...this is 1.5, right or not ?
That doesn't matter, one can even compute a more general integral like $\int {\frac{x}
{{\left( {1 - x^2 } \right)^n }}\,dx},$
and its result follows from galactus' procedure.