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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. Q/ I" ?, x# [0 v) X8 z
; s, e( O0 z* G/ T; w( b9 j, b(x - a) = x - a7 W! J$ l8 q' e" T9 x1 @. |5 |
(x - a) (x - b) = x^2 – ax – bx + ab
& [+ T- a! a! o% F( w, ]' C(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
; j9 E2 U' L# C3 [* ](x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
/ [" x1 H; _0 s- \' G1 D! N/ E1 R如此種推,
4 v" K) p* H) F7 e: C# v(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
5 B3 s- q/ f/ o0 {
& T. ], M% h1 `" \% g[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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