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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
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1 f) ^, b1 q: D& i5 Y2 r2 ], Z; r4 [(x - a) = x - a
$ K; Z4 ^; L2 P: ^(x - a) (x - b) = x^2 – ax – bx + ab
7 u- \& C; J' d- Q* W; w6 w l(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
! P" d. t" h# m( b8 L+ j8 \4 ^(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd$ O5 I5 I3 E3 d- x. E9 Z
如此種推," W" p2 k3 P% D. A6 o
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???- s3 O; w/ u, \8 z) o& L- x
# S) v8 `1 b, d# h+ k" f- k
[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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