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# 計算機用到的數學概念 ## 差分計算 平方 | n | n2 | 一階差分 | 二階差分 | |-------|---------|---------|---------| | 0 | 0| | | |1 | 1 | 1 | | | 2 | 4 | 3 (4-1) | 2 (3-1) | | 3 | 9 (4+3+2) | 5 | 2 | |4|16 (9+5+2) | 7 | 2 | (n+1)2 = n2 + 一階差分 + 二階差分
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