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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6 a2 k4 q$ v0 q+ c# Y# i/ R
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(x - a) = x - a- `, J* E$ {* g$ e. M0 h8 e( B
(x - a) (x - b) = x^2 – ax – bx + ab
9 d5 L8 G6 n% Y( V' @( ^(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
8 i0 D2 K0 ] L: E. E J5 `+ W(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
! w: k# }/ h0 I2 n5 {% f如此種推,
, A4 @. Z& H& h# y2 P n/ @- B(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
, V3 W" w: J7 R$ V
! X: [0 d( Z6 M- j* ^4 T$ [[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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