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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4 b9 s2 m* z5 s+ E: ]' v' K# N
( G' I- _2 u2 i! E( J; p(x - a) = x - a3 a+ F; w% ]5 _4 J4 y' ~2 D; G
(x - a) (x - b) = x^2 – ax – bx + ab% x6 v0 a' [% n: R) y7 Y
(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc; @* g% a4 Y, X8 G$ C1 v6 W
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd% Y% L: k8 s* ?4 V4 F
如此種推,8 V1 m. k1 `: _. i6 l' ~% e" G% }
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???9 o2 r5 z5 M8 s, Y, ` Z1 Z1 P7 @
% e) B" u3 I& E; L' Z6 h! J[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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