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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2 v' k. a, P1 k3 H; R
- ~- b. l5 S, W8 p6 L
(x - a) = x - a
/ W% F% x, q: v: n" w, i( r6 b(x - a) (x - b) = x^2 – ax – bx + ab0 X# v' ^( u9 U
(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
* [" G( ]# f* O(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd1 J0 V1 Q' @1 y( X/ h W R6 i
如此種推,
% t. |4 |: f" o P7 Y% {(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???% N2 d W& Q% A, k! a7 {- `7 e
: [. C* F- C' w8 K
[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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