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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. H* b" g% {6 _( o; w
3 ~, N* i u7 u/ p4 ]6 D(x - a) = x - a: W! t, H* ~0 f5 Y; c
(x - a) (x - b) = x^2 – ax – bx + ab
, Q1 S; o0 I0 N! V' y(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc/ @& ^+ S' a# l# t5 W7 a }
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
0 S6 b9 x& i6 [: `" h0 Y如此種推,
6 R5 q) R V7 P2 v7 `# P7 d! j(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???4 \$ N" w2 q7 [2 S' V
( y+ S1 W' k9 R4 B4 S[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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