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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/ y# V/ i. `! I% O# x$ Z# f
8 S- h# d2 x) C$ w* L- T: S
(x - a) = x - a
. B# w2 Q; u, V( _2 K8 G, L, e(x - a) (x - b) = x^2 – ax – bx + ab3 C2 M$ T& ~6 y8 {
(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc- V" `- s" N- ~. O5 o/ }0 W2 ?
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd4 I2 o2 S5 x7 ?% x; t: [
如此種推,
0 ~$ w; z' j, g& Q+ i(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
! g. w# u$ w" y; v# ?5 n$ f' ~9 U, T+ S5 n! A6 D
[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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