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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2 `9 { M, V4 I+ t4 {! r O
. w4 N, ]+ Q- J5 F(x - a) = x - a
. i8 {0 o: A8 j0 F9 F(x - a) (x - b) = x^2 – ax – bx + ab
. `( f; _1 w; @ K6 k- E/ N(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc" p9 F& V, z! {9 _1 Y# f; Z
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
, P0 @3 t6 Z* g* c9 p如此種推,
% U# @5 I' ]8 M(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???0 _5 k( i) y0 |! V% P9 z
2 H* O$ }8 G0 P4 U0 S V3 u[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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