#20273: 公式推導


antibird5566 (只是個初學者)

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2020-10-27 21:01:28
a111. 12149 - Feynman -- UVa12149 | From: [49.159.67.91] | Post Date : 2019-12-21 02:12

設邊常為n,當邊常為n時共有方形數

S[n]=1^2+2^2+3^2+......+n^2=

Σ[n]=n^2=

n(n+1)(2n+1) / 6

推導完畢
 
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