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1#
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
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(x - a) = x - a3 p' `7 z; R2 R2 R5 G& B I
(x - a) (x - b) = x^2 – ax – bx + ab, a. ]% b$ I" d$ X7 P5 p9 r
(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc5 X9 v. l2 b2 F5 ?8 i. M' R3 [
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd" p( e% W+ }. T0 f3 v: d' p, O1 ~
如此種推,
8 C# Y3 Q( D% g! m x5 c(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
i ^; X/ ~* W7 D- J/ Q. t
% Z2 V; C/ o+ I, k+ b[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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