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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
* L* ?5 n, A/ l4 w* v( Y- n2 x2 }* M7 [7 H) k1 C; k
(x - a) = x - a
, g1 P6 a& g& I% }- |9 Q% w, g(x - a) (x - b) = x^2 – ax – bx + ab
# p Z& i+ @& L. }" @' X0 m(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
$ c$ K& m/ j8 P* R* k(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
! s( g7 Z9 W, k$ R. m如此種推,
; E8 M2 X7 }3 X% |, M. W% {8 i! ^(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???: w) R9 ^+ L, K. ~. u) h9 I
3 }9 h, l8 _( z! x. C
[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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