| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎4 R, e; D( k- w! ~* ~# w
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(x - a) = x - a* W% A8 N# C7 n9 `4 `- O, o3 u2 Z
(x - a) (x - b) = x^2 – ax – bx + ab
( y+ E; T& }4 ?( V* m  B(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc  w" t* v: t( i. m) t1 t
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd, b* I. |* F0 U, |1 _
如此種推，# W  E4 V* E5 g; h9 y2 O6 o& g4 e
(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 ]

大大

點解你個問題好似有d問題
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Originally posted by Triangel at 2007-4-18 01:26 PM:& c' d2 e4 h' ?8 B+ h) z  A6 o
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 – abx + acx + bcx - abc
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[ 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:
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' ~: ?1 ]/ M# B4 v6 Y0 c7 e[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

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Thanks! 更正啦

littlenic

Originally posted by Triangel at 2007-4-18 01:26 PM:7 ~1 }% g+ {6 g2 R" `2 G
第一個答中有獎
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3 n* l. [/ o/ m1 U. q0 I(x - ...

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& `/ b  |; j1 j$ \2 G! @) ^(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) m% ^, O! P$ C) {2 i
似IQ題=.=
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& w; V" X8 B. c$ e$ W[ 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:
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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
$ z  O0 M9 p& t+ i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.........
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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 ]