| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
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(x - a) = x - a
7 k, S; O! [5 \/ b. q(x - a) (x - b) = x^2 – ax – bx + ab
; P0 Y, @( q& d/ n# r; L; F(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
% ]6 x; |- w! b" V  o1 D# o(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd8 q5 ]9 t$ e" e/ D8 k
如此種推，2 Z- z' V9 O2 W3 c% b
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???0 x9 z8 W. N5 F' u0 I: Z* q8 l
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[ Last edited by Triangel on 2007-4-18 at 01:52 PM ]

Triangel

Originally posted by 大大 at 2007-4-18 01:41 PM:1 Z0 b  {" _/ ^) n3 ]) g
咁難既=.="
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, C, {6 a- l5 e& s! X" ^[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

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Thanks! 更正啦

Triangel

Originally posted by littlenic at 2007-4-18 01:54 PM:
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. W  G, i3 F. ~. j: o1 s" ~# A(x-x)= 0 ，所以答案係0，is it?

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Bingo~