| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
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(x - a) = x - a
: G& E" J. c1 V0 ~; ]  b(x - a) (x - b) = x^2 – ax – bx + ab4 v! n: G+ d  M5 t9 l! s; m3 R
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
4 y4 B+ V  a; @" n0 }(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
( w, Z2 J- j+ n如此種推，
8 |+ S9 I' z0 l9 g) u& g(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???# `/ z* H# m: u7 y: t$ I0 {4 g( N
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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 A6 d  U( i0 ~4 O7 |咁難既=.="
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[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

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/ N" p" l/ C9 z% tThanks! 更正啦

Triangel

Originally posted by littlenic at 2007-4-18 01:54 PM:3 W/ T/ [" s1 e* x& C- X7 _! h( w
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# t9 {& X$ C+ w3 @9 @(x-x)= 0 ，所以答案係0，is it?

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! `: I, Y" G! B# [- |6 W& G4 {) U' YBingo~