| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎, H; o# `( V; Z$ {& \

8 i5 E. y7 m" a1 `2 v( y(x - a) = x - a- \5 H; l; G# |- q$ b  V
(x - a) (x - b) = x^2 – ax – bx + ab
* z! R* K! ?  P' G(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc- M4 _9 S9 |$ d( O6 n. b
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
7 }2 s7 ~, A8 t/ c2 A如此種推，: M- W3 _/ M2 O" B* ~* \" H; q
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
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( e0 y: l" f3 m% q[ 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:% d* i# x0 b! }& k, X
咁難既=.="
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0 D/ M. F6 H/ M" s' f& x( O[ 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:$ @4 C4 i6 l0 N# u- _
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(x-x)= 0 ，所以答案係0，is it?

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Bingo~