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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8 Q& U0 s3 N) q& Y' `
2 Z# h( ~$ r2 v/ |/ w8 _+ y2 `% z(x - a) = x - a
% o' Z. |3 V( L0 J, Z, A9 X(x - a) (x - b) = x^2 – ax – bx + ab/ k W' ~& B, a' B0 w. w
(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
3 p0 O; ~& h7 k5 H1 B3 P5 w(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
- O3 {( I# ?$ O2 l/ k如此種推,, d9 {* P. |0 L# d4 n. g
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???3 [# K1 a$ L2 P% ^8 t. F! Q
N) s2 q6 @. B- K0 E9 z$ k% [3 b
[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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