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Help for Number Theory problem

 
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Oct14-07, 04:32 PM   #1
 

Help for Number Theory problem

Prove that 1/5*n^5+1/3*n^3+7/15*n is an integer for all integers n.
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Oct14-07, 04:48 PM   #2
 
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Look at 3n^5 + 5n^3 + 7n mod 5 and mod 3.
Oct14-07, 05:27 PM   #3
 
Thanks, Morphism
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