My professor was going over some powers relating to series, and power series. He came across the problem below which he didn't even know how to solve. I am trying to figure out how to solve it, but can't get anywhere. Does anyone know how to approach this problem?(adsbygoogle = window.adsbygoogle || []).push({});

Express this series as a function of x.

[tex]\sum n^2x^n [/tex] from n=1 to [tex]\infty[/tex]

So, f(x) = ?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Tricky Series Questions

**Physics Forums | Science Articles, Homework Help, Discussion**