| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
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( R. n8 a4 N9 B4 r(x - a) = x - a
/ A# S( u6 `% d. _! L(x - a) (x - b) = x^2 – ax – bx + ab: F, j/ Z/ i8 W3 I9 r$ }* D
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc- C- I4 E8 v/ d. V; w1 L  O
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd* D" F2 Z2 l- X4 {6 F; c6 p, l
如此種推，
+ ~. l3 E' \  s9 i; a& c(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???- J/ r' u6 C. w1 S7 g

% Y1 f7 ^2 j. K[ 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& ?6 |# o# F1 C4 O! g, @/ Y

Originally posted by Triangel at 2007-4-18 01:26 PM:: t# N9 g$ M# N8 j
(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:& T- R; O4 ^/ x+ t
咁難既=.="
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7 r9 _) A% w% t  }8 h[ 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:
, ~! _. P: I: F6 `/ z  a$ s" A第一個答中有獎
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$ V- m9 I2 |# d+ N( s/ Q(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" L( k1 K$ e" Z* d% r(x-x)= 0 ，所以答案係0，is it?

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. m9 y% k  Z7 N5 ?, t/ V3 v唔似a.math題
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5 k1 T3 Z2 V" V, b6 F8 {[ 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:" d  O# D/ ]) p" B5 z0 p- ^, c' C
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$ c4 A% o5 X& b# @(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
7 |  u; t$ F, V+ `% d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.......... U7 O2 h/ m1 j; e
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這條問題，貼落吹水版，名副其實4 L& l; |+ p! I9 v5 c; l

. k6 H  S- j+ X- G8 d5 u2 P[ Last edited by karen0123 on 2007-4-18 at 05:51 PM ]