中六柏卡斯二項式定理數學運算一問

2007-12-22 8:16 am
(2^P)^Q -1
化成
(2^P-1)「(2^p)^(q-1)+(2^p)^(q-2)+.....+2^P+1)

我想問點解可以甘化?吾該詳細d^^
二項式定理是否可以應用於此(2^p)^q,不是一定要(a+b)^2的形式?
更新1:

我想問黎種數學叫咩?

回答 (1)

2007-12-22 10:09 am
✔ 最佳答案
x^n - y^n = (x-y) [x^(n-1)+x^(n-2)y+x^(n-3)y^2+.........+y^(n-1)]

You can prove it by simplify the RHS
x^2-y^2 = (x-y)(x+y) is a special case for n =2.

So,
x=2^P , y=1, Q=n for your question.

No Pascal at all.
參考: me


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