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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! X0 Z* j, f; V& X
4 H- g1 ^- v1 [" X
(x - a) = x - a
, b ]9 }' w) C/ k4 S(x - a) (x - b) = x^2 – ax – bx + ab
: F: |( r! |8 j m( }% F' m M(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc3 e7 B$ R, q% c" S& F
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd0 A# ^( f0 I# O: M) x7 X
如此種推,& Z$ X3 Q' e" B4 r/ H
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
2 y% d4 ~- N; x% g3 o! ?5 |& Z- _4 T' T4 E
[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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