| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎% _8 |8 n, }8 u. T  x# Y0 u3 V1 I& `
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(x - a) = x - a; k; N$ o" [! l. d2 Q; X
(x - a) (x - b) = x^2 – ax – bx + ab) o6 b7 {1 U$ _' `" T% G) L
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
: }; w/ u! I5 Q: Y: ]4 n5 Y(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd' n8 W5 d* d3 J: @6 N+ b. f
如此種推，* ~' ?' G( N3 Q
(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???9 V. P1 O: |' C6 y( U
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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0 Z2 R1 k! r/ }% o4 q

Originally posted by Triangel at 2007-4-18 01:26 PM:
" m) T, g, U0 a(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 – abx + acx + bcx - abc) O; B: y/ ?( q% J  g/ h* H
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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:- L0 [) f5 n% q# h5 ]( z
咁難既=.="4 I5 `" f1 u' I/ j# D

- \, a+ b5 b, c! U' s[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

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/ \  {% V# x$ T+ D/ Q# `( ~1 zThanks! 更正啦

littlenic

Originally posted by Triangel at 2007-4-18 01:26 PM:
# L" X5 u- y0 X第一個答中有獎' C5 S; `/ z" B1 }

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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:) l$ g0 D3 i5 c* l, ^% R, N

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. w) ^2 ]4 g* Q(x-x)= 0 ，所以答案係0，is it?

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4 L+ j& C1 B, q( }+ j: i唔似a.math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:% N3 Z8 {7 B) M* H0 }

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(x-x)= 0 ，所以答案係0，is it?

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5 W+ ~2 ~8 R0 r8 V. `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' ^$ I9 T; N; U* q3 `0 N

. K; v% I& h( D2 L; i- j- Y[ Last edited by karen0123 on 2007-4-18 at 05:51 PM ]