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平方求和公式

更新时间： 2021-02-20 06:41:59

1、平方和公式n(n+1)(2n+1)/6

2、即1^2+2^2+3^2+…+n^2=n(n+1)(2n+1)/6 (注：N^2=N的平方)

3、证明1＋4＋9＋…＋n^2＝N(N+1)(2N+1)/6

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