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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6 M" C. T8 d6 e
3 ^* K. K6 b: s3 g( C
(x - a) = x - a
, f: b5 y3 l; H4 {5 h0 E/ s3 K(x - a) (x - b) = x^2 – ax – bx + ab
/ u0 I9 J4 ?* W1 e& @. }(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc2 V( D2 U1 t, z7 J; I) N
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
, W- m+ {0 A- H+ l* L6 Q6 ?4 w如此種推,
& a/ X; F3 [$ t/ ?: m7 N(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???, V4 [$ j4 [1 v7 S
+ {5 T. o, L8 A3 B6 N7 C[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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