| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
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(x - a) = x - a" M; l% P" D- }7 g; V
(x - a) (x - b) = x^2 – ax – bx + ab  `+ `$ f; B3 Q7 g% ^
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc1 ?& a3 H8 M8 i5 A: G
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd2 T8 G1 A, G5 s. u' X
如此種推，2 W$ P& F& T8 E6 P) I2 i! X7 ?8 h
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
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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:- B2 u# m  g- \! s! Q' X8 e" R
咁難既=.="
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[ 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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( b+ h. @; O' L9 [$ t8 m3 O(x-x)= 0 ，所以答案係0，is it?

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& I, A1 I1 L) `" J  B( z. B( bBingo~