| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎% O. A' H3 k! ^8 w
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(x - a) = x - a
: A1 e" d: }+ }9 G0 G8 z, A(x - a) (x - b) = x^2 – ax – bx + ab8 e; c$ H9 C$ k" o
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc: S; V/ n6 e' i. H1 Z, Q0 {  b2 k& `
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd) l6 Y5 {6 A6 \9 h0 [/ m" b. I
如此種推，
( p4 {6 f7 w% g. O' }(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???3 _1 Z, [2 k8 b+ q

2 n( r! Y9 Q% i5 G+ Z[ 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:
# R% N* d; F1 M* C(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 – abx + acx + bcx - abc
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. n( F5 f% u9 U/ q: S( d[ 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:/ j% @& z% P1 H3 q; 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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  c3 v$ W- V. Z  A- zThanks! 更正啦

littlenic

Originally posted by Triangel at 2007-4-18 01:26 PM:
& ~0 t8 o! _. _+ G, F# o" }第一個答中有獎) f! B7 U$ p4 o& R' N$ ?

9 m+ s8 e) C9 p(x - ...

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8 y& \* Y7 n% x2 E(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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% u; w: g5 P4 z# s1 N(x-x)= 0 ，所以答案係0，is it?

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唔似a.math題0 b( c- P1 k9 F, t6 G* b
似IQ題=.=
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5 }: a7 Z+ y4 i0 H& }[ 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:- S4 W. r( {& ]8 i  Y

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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; _7 w/ ~8 ?& ~$ B! Q, G6 N6 F
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.........; ?/ k1 G4 F" d8 F4 h
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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 ]