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Proof that 1²+2²+......+n²=n(n+1)(2n+1)/6
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Proof that 1²+2²+......+n²=n(n+1)(2n+1)/6
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Proof that 1²+2²+......+n²=n(n+1)(2n+1)/6
Comment
Proof that 1²+2²+......+n²=n(n+1)(2n+1)/6