| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎/ k$ k' x3 ?7 ^; @

# v, R2 O8 g: I1 Q(x - a) = x - a* g6 s% f9 c: i: X8 `
(x - a) (x - b) = x^2 – ax – bx + ab/ t( D, Y/ A* Z; j+ P- O7 r
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
) x9 k) E9 [3 r3 N  r% u7 J/ b(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd1 N' Q6 [4 |. s. L5 Y6 F
如此種推，
( [: S7 O7 G' ^. g' _(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
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  I, E! s& o, {: 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:
9 n4 r5 O- \4 i# ~/ n' G(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 – abx + acx + bcx - abc
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0 _1 f' O% s4 R$ v8 H[ 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:
6 a: d, A. v: ?' D# b2 q咁難既=.="
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[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

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: V! F8 V+ d2 P9 p& lThanks! 更正啦

littlenic

Originally posted by Triangel at 2007-4-18 01:26 PM:2 b2 n2 F' s- a3 [+ g3 c. R1 I
第一個答中有獎9 D+ J. @! {0 u" v
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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:5 @! R6 v" e0 @3 M/ Q

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(x-x)= 0 ，所以答案係0，is it?

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# t1 T/ Z  W% w/ L唔似a.math題
& f3 y3 u9 a7 ?3 h2 ]  T似IQ題=.=
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! V: G5 N/ p$ q0 T# Q" P1 ][ 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:, z( l% e  E2 j! Z! E" B
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. K2 z6 r% k. ~8 T4 s. |( s(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! h% P6 Q+ j0 z: O/ T
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.........* u. j% I: I% f2 v
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這條問題，貼落吹水版，名副其實, `' Y. Y% u- p2 B$ ^' b& i
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[ Last edited by karen0123 on 2007-4-18 at 05:51 PM ]