8.2 due wed 11/28

Difficult:

Why is x_l = l(delta)? (top of pg 293). Also, I think that we could have used just a bit more explanation on what DFT/FFT's are.

Application:

In general, the DFT seems really cool based on what I've seen of Michael's pictures from Physics and such, but I can't seem to understand how exactly they work.

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