Re: Fourier Series Problem.

Without doing the work I'm guessing that with the right choice of x value you will get

|x| = constant + constant * (your sum)

Re: Fourier Series Problem.

I haven no idea what you are talking about :S

Re: Fourier Series Problem.

I know what the Fourier Series is if that helps at all, it's:

f(x) = (1/2)+sum k=1 to infinity 2[((-1)^k-1)/(pi^2*k^2))*cos(k*pi*x)]

Re: Fourier Series Problem.

Re: Fourier Series Problem.

Strange, I make it $\displaystyle \frac{1}{2}-\frac{4}{\pi^2}\left(\cos(\pi x)+\frac{\cos(3\pi x)}{9}+\frac{\cos(5\pi x}{25}...\right)$ and with x=1 it certainly gives the correct answer for the sum.