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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
U8 W) {1 |. i) ~, a+ x9 u$ R0 ]- x
(x - a) = x - a
$ \' Q7 D8 L9 T S! Z) _/ B0 u+ }(x - a) (x - b) = x^2 – ax – bx + ab
0 C7 S. k9 K' T! U) {(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc" ~, @' w) j% R9 k3 ?
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
7 Z' F6 v) W+ D. f$ Q. ~如此種推,
5 |! ]2 O( D* n; [(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???! N9 `% Z& u8 |# A: J* @, M0 i
# G" Q4 P3 Z% ~# p$ x4 G
[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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