(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

f(x) = [tex]\sum[/tex] [tex]\frac{9^{n}}{4n}[/tex] x[tex]^{2n}[/tex]

n=1, [tex]\infty[/tex] is on top of the summation sign.

2. Relevant equations

a) Use the Ratio Test to find the radius of convergence of the Power Series

b) Find f [tex]\grave{}[/tex](x) and write out the first three (non-zero) terms of the power series for f [tex]\grave{}[/tex](x)

**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!

# Homework Help: Differential Equation homework help

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