| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎5 d- ~  j$ U1 P0 v2 |' K+ S
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(x - a) = x - a: i# }7 i5 L- N, w' l
(x - a) (x - b) = x^2 – ax – bx + ab
* v2 f' E4 T4 u# ?9 L(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc  X* [* M! X+ D! T
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd% Y7 u: m! [7 W6 ~; G9 U9 T
如此種推，* n# s* e! N0 j$ m( R$ Z
(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; Q# p0 i2 l* d. h# {. b' h

Originally posted by Triangel at 2007-4-18 01:26 PM:$ J& P- z7 i# c
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 – abx + acx + bcx - abc
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1 N+ `- K) ^' ]0 ~1 `8 N4 v/ l# |[ 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:% w* J: e6 n  ?8 R; }; u
咁難既=.="
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[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

4 w9 R& \, r+ X

1 r. X9 _7 l8 \2 b' mThanks! 更正啦

littlenic

Originally posted by Triangel at 2007-4-18 01:26 PM:
" P) ^& z4 i9 z2 @( W; E, H第一個答中有獎$ [: Y8 Q# Y1 D$ o. U7 b1 t

8 C  m4 v/ Y7 {+ 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-x)= 0 ，所以答案係0，is it?

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唔似a.math題4 V0 \: d, f  X7 o; k
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
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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' E6 @. \5 [# j8 f( T

7 s0 ?( g  \5 d. @$ a3 G[ Last edited by karen0123 on 2007-4-18 at 05:51 PM ]