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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& k: W2 }0 }2 [; q# w
6 z5 }6 ?8 o$ b' C$ C% s2 X# Y B
(x - a) = x - a
$ ? a6 W0 h' ?, o f(x - a) (x - b) = x^2 – ax – bx + ab' W- X( F( j* c, `0 t* O, S
(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc( U8 L [- x" W
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd* m. F B6 z5 x& n# n! D
如此種推,
. I, m6 t7 P4 i, H& s0 U* g- N* ?(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
/ {1 h' ^1 f( x* _1 l0 O* `" j, N, i: b6 `' t. j0 J2 g
[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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