# Math Help - Sum of a series using partial fractions.

1. ## Sum of a series using partial fractions.

(a) Express the function as the sum of a power series by first using partial fractions.

Well I ended up getting the entire problem wrong. I still don't know the series notation or the interval of convergence.

3. Originally Posted by elpermic
Well I ended up getting the entire problem wrong. I still don't know the series notation or the interval of convergence.
Well, express it as partial fractions, by noting that $10 = (x+1)-(x-9)$, or otherwise.

Then you'll need to use $\displaystyle \frac{1}{1-t} = \sum_{n \ge 0}t^n$ for $|t| < 1$.

4. Originally Posted by elpermic
This is not what is meant by "Post your working". In fact, this question looks like part of an on-line assignment. Please read fourm rule #6.