Hey everyone, I am stuck on 2 questions, so if anyone can help me that would be much appreciated.

Fourier Series representation:

The first question is to integrate both sides of from -2 to 2 to show that .

The second question is to multiply both sides of by and integrate from -2 to 2 to show that .

Because of the domain restrictions on f(x) I can't figure out what to do for these questions.

If you can help me it would be nice. Thanks