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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+ r" \0 g$ k! n% T7 O; c
, J. `& m6 H( W2 z6 o
(x - a) = x - a
x3 \% X7 Z# k s d4 |5 ?/ _(x - a) (x - b) = x^2 – ax – bx + ab
6 `# s% q) x) y. N/ F(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc6 H+ ~0 r3 y2 K
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd$ A+ g/ N, O0 q, R# E" r
如此種推,
; g9 |( H G% }; E(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
* X9 B8 `& i) q2 x+ Q4 F3 p2 r6 a- M7 }. @, ?& e# S; x+ A
[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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