| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
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(x - a) = x - a
. z- B, a4 |% `% O$ V# h(x - a) (x - b) = x^2 – ax – bx + ab5 F: I9 x* p, I4 \5 r
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
% k; R7 C, j1 [  w  H* i3 f! ?* K(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd3 e. O; ^# @5 B$ d5 i2 V
如此種推，
. P/ w% u. ^1 M: W$ M; z$ s(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:+ C+ K' a- d/ [$ |0 Y
咁難既=.="
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2 s8 Y0 H) B) D3 i/ A[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

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, ?0 l6 \( S* u% a1 J$ q% t4 wThanks! 更正啦

Triangel

Originally posted by littlenic at 2007-4-18 01:54 PM:9 u% F  y/ t. b* [8 J2 E( }; z

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  C0 T. O( v: q0 ~(x-x)= 0 ，所以答案係0，is it?

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  f/ z0 V, A$ U' `Bingo~