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1#
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 ~) Y: M! P0 t2 }
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(x - a) = x - a
" r% ~$ o8 B6 A# \(x - a) (x - b) = x^2 – ax – bx + ab
8 e0 b' w: c% m; \(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc- t+ L" X9 W0 h5 F$ s$ i
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd3 E- y4 B) D, j3 S. x: Q* X
如此種推,6 |0 O; A* L6 ^, H: j' s6 {
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???$ R/ H4 |8 d$ y9 m0 G2 b
8 F- @1 J/ j$ O5 s) _( K' g[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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