Hello,

I am trying to compute the sum:

Summation (1/ (n^2)): boundaries n=1 to infinity

Given that the Fourier series for f(x) = x/2 is

f(x) = summation {[((-1)^(n+1)) / n)]*sinnx

I would really appreciate some help on how to perform these calculations. The text I am using doesn't give examples on these types of problems and I really don't know where to start.

Thanks!!