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Help for Number Theory problem

  1. Oct 14, 2007 #1
    Prove that 1/5*n^5+1/3*n^3+7/15*n is an integer for all integers n.
  2. jcsd
  3. Oct 14, 2007 #2


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    Look at 3n^5 + 5n^3 + 7n mod 5 and mod 3.
  4. Oct 14, 2007 #3
    Thanks, Morphism
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