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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; [8 H/ Y7 k5 I5 C+ t% ]1 V
+ i/ U' i: v3 q( F- ^5 e(x - a) = x - a
& S9 l7 X, A: a) D(x - a) (x - b) = x^2 – ax – bx + ab
2 `) F% K; W/ e7 z1 H' K9 o( W$ J(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc* w; K P3 s/ O- p1 S3 K
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd* A6 P8 f; N f/ i
如此種推,
$ p- `4 ~; ^% i v, M3 |(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???- `+ q/ p$ e+ P
$ f5 E9 v: P+ D8 G, L Y, ?% C9 v[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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