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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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# a2 i2 G! f9 X' W3 x(x - a) = x - a, t: y& w' w+ r
(x - a) (x - b) = x^2 – ax – bx + ab- Y) }, q( I" v# H& F
(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
2 z7 J: `, k- p$ f% S, E(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
6 N# o( |8 z9 Z$ l/ t. @如此種推,
$ `( c W7 f; b8 X% M(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
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3 x' g B/ h1 M; ]9 @- X& @[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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