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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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(x - a) = x - a Q) F: i) y4 Z
(x - a) (x - b) = x^2 – ax – bx + ab6 |) u: m0 G% |
(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
7 B- h1 @& T7 g! t3 B% a+ r: L: D(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd& R% i/ `2 r { r/ l+ ^
如此種推,
6 O5 [2 K- m% U(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
! d% [. V8 E$ e7 V( F4 p0 \# ^8 b7 v( j, x) ^9 d- L
[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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