find the radius and interval of convergence of:(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\sum_{n=1}^\infty\frac{(-1)^{(n+1)}nx^n}{2^n}[/tex]

the radius is [tex]x<2[/tex]

and the interval is [-2,2)

are these two answers correct?

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

Dismiss Notice

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!

# I need some peer review of this problem

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