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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/ y1 C8 S" P+ f5 N& E# m
$ U8 o C" N) U0 L(x - a) = x - a
8 k8 ` m" A" D- P6 `(x - a) (x - b) = x^2 – ax – bx + ab, h8 a( K: ~6 j& L$ F+ V' a
(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc9 Y# d F1 f I# C4 O( u
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd4 ]5 P7 P8 `7 Z
如此種推,
& e/ S, G( S, M& c5 p8 b(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
+ B+ N4 D3 W _. w! d4 }# ^9 W; ?/ {5 o$ L5 {
[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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