| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
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( m. n- y) g& l(x - a) = x - a" Q5 m2 B( M! t$ r/ F1 t
(x - a) (x - b) = x^2 – ax – bx + ab" ]1 s7 p5 D% x
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
0 f( _; A5 J3 h; _(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd. k# ~# ^: _' ~; L- m
如此種推，
+ x  t/ x" s) G9 T: \) b: c# ]& F2 e(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???- C* w$ a' G+ W

! C; a3 b  s, m" S[ 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# d6 X3 h, J" S6 `

Originally posted by Triangel at 2007-4-18 01:26 PM:
6 P. y& K; {; U0 S, [( [! J- ^(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 – abx + acx + bcx - abc
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% h: f  E* }! w- c[ 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:
* {# t! V0 h( Q( x; H咁難既=.="; y7 j5 q9 ^2 c. h1 K! C

1 r9 d/ e0 k  I$ P) ?' s. x& G[ 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:4 F- ]5 R, S4 S& N8 N, |: B
第一個答中有獎, x0 T1 E; T0 |% `

$ C8 |+ f6 B' f* I) k* Y5 }(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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8 c( s! S0 @+ h" k(x-x)= 0 ，所以答案係0，is it?

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唔似a.math題
: Y8 J5 Z9 \# J似IQ題=.=6 F. o0 F" a0 Z# U: }6 E7 m3 E  K6 C# |

4 x0 [$ U  i) z# s[ 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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/ U+ C9 }4 M; ^  U& H$ B1 S& r
; [3 ~/ r) k6 x# ^(x-x)= 0 ，所以答案係0，is it?

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+ G6 V5 n5 \% z1 N3 SBingo~

waikong

我係學校個學生會單張見過7 v) ^0 P! u7 A
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.........) }8 h- w5 H" ^, z
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這條問題，貼落吹水版，名副其實" `% x+ v' e' G

# N9 b5 A# P$ ~[ Last edited by karen0123 on 2007-4-18 at 05:51 PM ]