| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
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(x - a) = x - a! U4 {  ?$ S* H9 E
(x - a) (x - b) = x^2 – ax – bx + ab7 v% M8 F7 c' L" w
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc( z* X' ^# l( E, {
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd. l/ J1 B; g3 T/ ]3 U0 y4 `" U9 B
如此種推，% I# ?- q/ E+ j" p  W0 _
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???  V( F5 W: C% g% z* d; ?
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[ Last edited by Triangel on 2007-4-18 at 01:52 PM ]

大大

點解你個問題好似有d問題& x. q0 r1 m/ b% n( {- n

Originally posted by Triangel at 2007-4-18 01:26 PM:" F2 E$ r1 e5 ~. C# B+ `& l2 {
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 – abx + acx + bcx - abc
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  h/ I% L- a, F, o& p[ Last edited by 大大 on 2007-4-18 at 01:54 PM ]

Triangel

Originally posted by 大大 at 2007-4-18 01:41 PM:' N4 C$ a- L5 g% }5 p" z+ X
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% ]" L9 k0 _+ J4 M9 f! O- C: [  TThanks! 更正啦

littlenic

Originally posted by Triangel at 2007-4-18 01:26 PM:5 H" `" g, p1 n7 p; F9 G7 z
第一個答中有獎
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(x - ...

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(x-x)= 0 ，所以答案係0，is it?

大大

Originally posted by littlenic at 2007-4-18 01:54 PM:
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(x-x)= 0 ，所以答案係0，is it?

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唔似a.math題
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[ Last edited by 大大 on 2007-4-18 at 01:57 PM ]

Triangel

Originally posted by littlenic at 2007-4-18 01:54 PM:4 `, |( w) {( \. A( C$ d! K# i
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(x-x)= 0 ，所以答案係0，is it?

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Bingo~

waikong

我係學校個學生會單張見過
8 i$ D0 y; W9 i2 H諗左一陣先諗到

playbr2

我吾識答啊http://i72.photobucket.com/albums/i162/xcopy/Monkey/049.gif~~~ http://i72.photobucket.com/albums/i162/xcopy/Monkey/022.gif

karen0123

(哭)~~~~~其實我都知係0.........% w: y: r$ u8 F* P. [- @
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這條問題，貼落吹水版，名副其實
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[ Last edited by karen0123 on 2007-4-18 at 05:51 PM ]