| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎/ I; {; y9 G+ r/ j

8 A: I7 N9 f! ^1 C$ O4 L(x - a) = x - a, r8 m% d- `) D0 e! V3 R$ q
(x - a) (x - b) = x^2 – ax – bx + ab; \# I. e% a- P+ d! H9 ?, F5 w
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
# t' X; s6 b  t# p) E5 `(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd
# A2 ]8 E& t# i3 m0 i如此種推，
7 T; f+ S8 x, b  j" v  i/ d(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
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' A  W) W, d2 U[ 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:0 ?! C5 F- b% I8 ]8 I0 y: A6 d- R
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 – abx + acx + bcx - abc4 O6 v& W/ M, K) ?

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/ A+ b4 _6 C' R8 D( H+ ~% g[ 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:# g; a2 p' e' A  T
咁難既=.="
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[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

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) a4 k1 t& G" mThanks! 更正啦

littlenic

Originally posted by Triangel at 2007-4-18 01:26 PM:
+ X& G; R; v8 ^第一個答中有獎
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4 r, }) O: }/ A8 W7 Y' Y  Y+ q6 }(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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9 O9 i9 C$ x% }5 Z: f% \唔似a.math題
' }  `) O) K; D1 D似IQ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:
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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
- x# g6 k' Y5 V- M4 _; q5 v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 ]