# Fourier transform - would appreciate if my answer can be checked

1. Jan 21, 2012

### memorex88

1. The problem statement, all variables and given/known data

Question: Find the fourier series for

f(x) = x(2π-x) 0<x<2π f(x) = f(x+2π)

hope the pi is clear as π

3. The attempt at a solution
this is in the attachments

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2. Jan 21, 2012

### vela

Staff Emeritus
The constant term should be $2\pi^2/3$, but other than that, your answer looks fine.

One easy way to check your answer is to simply plot the series using a computer.

By the way, you're finding a Fourier series, not a Fourier transform, which is a different but related concept.

3. Jan 22, 2012

### memorex88

Thanks Vela for checking, oops been doing both topics lately, slip of the tongue

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