题目内容
求证:52×32n+1×2n-3n×6n+2能被13整除.
答案:
解析:
解析:
| 52×32n+1×2n-3n×6n+2
=25´32n+1×2n-3n×2n+2×3n+2 =25´32n+1×2n-12´32n+1×2n =13´32n+1×2n.
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