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發表於 2007-4-18 01:26 PM
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| TriTri | A-Math 加分題 |
第一個答中有獎' |" D( y" ]# _9 l
3 W$ s$ E* }( y; J(x - a) = x - a
/ ~, ?% P0 q, U, f9 m% P* l" R& u4 ]3 y(x - a) (x - b) = x^2 – ax – bx + ab
+ g$ g G5 m( X2 w' t(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
# c1 [# K5 \- D(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd& A% r- k: `$ }+ f% w9 @/ Q, K; e
如此種推,
0 d" g4 o; V m% E- }) u* M4 e(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
* |4 s7 P+ D' g4 P, l' R
: ^; Z! U8 s: Q- M# _) q3 z: Q[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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