[Everyday Mathematics]20150215
2015-01-21 15:42
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设 $n,k$ 是正整数, 使得 $x^{2k}-x^k+1$ 整除 $x^{2n}+x^n+1$. 试证: $x^{2k}+x^k+1$ 整除 $x^{2n}+x^n+1$.
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