| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
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, A4 n. v- d* o4 \- t6 G+ @! \0 v(x - a) = x - a; f6 l6 a. [% T& r( c6 _3 P
(x - a) (x - b) = x^2 – ax – bx + ab! v" l& _3 z: f9 d  R
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc* V2 l* ]% v( ]
(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd' i( Q9 W- I9 g% O
如此種推，
) a3 K+ Q; w7 A+ O( O(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???3 n2 |; p5 o8 F, o' o  E+ Y$ S2 v

2 @  j) h7 s9 i5 Q' U6 O% T% H9 h[ 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) {3 N0 u" O$ x. ?8 T( O. c

Originally posted by Triangel at 2007-4-18 01:26 PM:2 i# F6 T; a. \
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 – abx + acx + bcx - abc
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! C$ z* d8 S7 F4 k5 _' 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:3 F4 w: Y$ t/ S: y
咁難既=.="8 c$ N- w  p: L: e) U# \2 c" b5 [6 y
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[ 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:
( W8 ~# W# H- |% r, k第一個答中有獎4 V0 s( g; m0 W6 h

% W9 _5 ?6 R0 j(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:4 ~+ _- i" C) c; {, x8 ^

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5 d9 U! X( R, u2 N' R" v& B(x-x)= 0 ，所以答案係0，is it?

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3 j/ D2 A* k0 `7 B! g/ l8 v/ h( {唔似a.math題! a. W5 C: e6 ]3 J6 Y
似IQ題=.=8 M5 Y8 D. @& k* G  S3 C
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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:" v: z. Y! V* B6 f6 q9 o/ o" S
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3 b5 y) {  V2 G& J; m: ~" T(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- E, v" Z2 B7 X2 P
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.........3 Y2 x" H3 h" x5 l+ v1 r
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這條問題，貼落吹水版，名副其實
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8 Z. D# \" x6 n2 B) ][ Last edited by karen0123 on 2007-4-18 at 05:51 PM ]