# An Integral problem: need help

1. Apr 29, 2008

### Cy4NidE

This is my first post so bare with me plz.

What is the integration of DX/(x^2+1)^(3/2)

The (3/2) is the power of the bigger parenthasis. The dx is on top, and the rest of the problem is on bottom.

2. Apr 29, 2008

### rock.freak667

$$\int \frac{1}{(1+x^2)^\frac{3}{2}}dx$$

If you have something like that usually what you should do is see if integration by parts will help and if that doesn't help,look for a substitution.
Try substitution x as some trig function.

3. Apr 29, 2008

### transgalactic

try to substitude x=tan z