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Math Help - hello

  1. #1
    Newbie
    Joined
    Sep 2012
    From
    missouri
    Posts
    3

    need soluion for this..help me as soon as possible

    how to prove:
    let n=p1^r1.p2^r2.p3^r3...pk^rk where p1,p2,..pk are distinct primes and each ri>=0. prove that n is a perfect square if and only if each ri is even.
    Last edited by lenin1234007; September 4th 2012 at 01:47 PM.
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