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Math Help - prime number

  1. #1
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    prime number

    please help. thank you.

    Let p be a prime number

    a) Prove that p divides (PLZ SEE IMAGE) if 1<= k <= p-1
    b) Porve that (n^p)-n is divisble by p for every n ε (exists) N
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  2. #2
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    (b) This is Fermat's little theorem stated in a strange way.
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