# Series homework help problem again

1. Sep 11, 2010

### Petar Mali

$$\frac{1}{\sqrt{\sum_{\alpha}(x_{\alpha}-x_{i\alpha})^2}}$$

Aproximate this function around $$x_{i\alpha}=0$$. I don't know how to do that? Any idea?

2. Sep 11, 2010

### mathman

Re: Series

x=0 ? Is this for all α and is there only one i?