| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎# A' b$ v+ z8 k- f$ S

* J6 {5 X# z+ ^4 a3 }  A(x - a) = x - a
* J# j2 D, u# w3 W(x - a) (x - b) = x^2 – ax – bx + ab
9 N+ B" r7 A( {) ]" F& h(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc: G6 }6 R9 A1 v6 H, k4 O
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd8 F3 k' a. z! _) v2 _/ I" |/ C+ C
如此種推，
5 _6 S5 Q5 q$ W$ j1 W(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???( Z- `) \) x& A8 V1 B

; y5 _  Y9 w1 w, N$ T[ 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$ D2 s1 s- F; @' F

Originally posted by Triangel at 2007-4-18 01:26 PM:: j/ z! U" f' w( q; p* H1 L
(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:- y* n# k% {, Z4 N
咁難既=.="
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8 J7 r4 ^1 L2 F6 S. Y2 m# C2 C[ 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:. m" Z3 R: E1 d7 x
第一個答中有獎
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(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:) H6 `( l* s9 r7 m, }

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(x-x)= 0 ，所以答案係0，is it?

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; Z. x$ {4 ?& k' g唔似a.math題
7 _( |6 N' C. o9 N似IQ題=.=
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" c3 `$ |1 a; ^. L0 i" @[ 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/ Y7 Z! Q/ H3 {8 E
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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; E8 z: t5 [0 T2 r6 G% Y* ^[ Last edited by karen0123 on 2007-4-18 at 05:51 PM ]