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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
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9 n* Q' [3 \. L) q3 i- o(x - a) = x - a
, o6 \+ C& z% A* Y9 f6 }& T) ~% W7 D(x - a) (x - b) = x^2 – ax – bx + ab% W. L0 Y5 m$ }3 Y- o
(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc6 b/ I* F6 ~0 h" c+ x4 s' b
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
- R: X7 L" s" b4 O0 b2 U" ^如此種推,
* J6 u, ?) C& g% ~4 e+ j+ {" `(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
5 ~: b6 O: j1 d1 e% |3 _
* i9 b) g) Q' F O, b0 B/ a5 k[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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