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Math Help - Calculating Power of Periodic Sequence.

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    Calculating Power of Periodic Sequence.

    I'm trying to do parts d i) and ii) of following question:
    http://www.cl.cam.ac.uk/teaching/exa...y2011p6q8A.pdf and have attached my attempt at a solution. I'm pretty sure my DFT is correct for i), but I can't seem to show that the power of the sequence is 1/2.

    Any help would be greatly appreciated.

    Last edited by StaryNight; April 15th 2012 at 02:21 PM.
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