Hello,

I've been working on this problem for a while now (hopefully the image worked), specifically part 4b i. I thought I had a solution, but then I realized that the square of a summation is not the summation of a square and that little mistake destroyed my proof.

I know that the power (P) is the limit as t --> infinity of (1/t) multiplied by the integral from -T/2 to T/2 of [x(t)]^2, but taking the square of the summation is where I get stuck. Does anybody know how to integrate the square of the summation, or how to simplify the square of the summation so I can integrate it?

Thank you very much