- #1

Hepth

Gold Member

- 464

- 40

$$

\frac{1}{\sum_{n=0}^{\infty} a_n x^n}

$$

about the point ##x=0##, such that it can be expressed as another sum ##\sum_n c_n x^n##?

I tried doing it by taylor expansion but I end up with a sum of sums of products of sums :) and its been too long for me to remember a lot of the more advanced simplifications.

Thanks.