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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+ A3 m/ W+ k" {7 d
; `9 n6 \1 h. t
(x - a) = x - a2 Z: O% \$ P, u; d# ]1 E1 D4 F
(x - a) (x - b) = x^2 – ax – bx + ab4 u) \* y6 P6 H: x: O$ S
(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
# s" ^% `, s6 I2 i: | s, B(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd2 p. N$ Z' `% P/ {1 @) \ @
如此種推,
0 e" {) D3 c6 M }(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???: r& _& q( @# v, h" z( q
- _# Q( o5 x9 K% N" T3 B[ Last edited by Triangel on 2007-4-18 at 01:52 PM ] |
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