| TriTri | A-Math 加分題 |

Triangel

第一個答中有獎
; D1 V- g7 Q0 V% G4 {5 M8 [6 Y
( \# W2 X/ h8 S, O(x - a) = x - a
4 b* W2 [- j* {$ o+ o(x - a) (x - b) = x^2 – ax – bx + ab
0 T6 l( O, n& p/ q3 f  E(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 + abx + acx + bcx - abc
( W, J, I$ D" W" v: t(x - a) (x - b) (x – c) (x - d) = x^4 – ax^3 – bx^3 – cx^3 – abx^2……………….. +abcd' }, P) N0 }3 b9 c
如此種推，
% L* V" }' C. _' a, |(x-a) (x-b) (x-c) (x-d) (x-e)……..(x-z) = ???
* a9 ], f/ q3 s; f) c$ l/ N. w+ f4 I  g
[ 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
( P. A- g4 X% F# N- |6 W7 k0 ^# {& P

Originally posted by Triangel at 2007-4-18 01:26 PM:
# j; H- {! L' M(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 – abx + acx + bcx - abc- S0 ]7 p6 T% K

7 C2 q4 i- L  ^: A& r. ~% U" _

5 B' f! U9 X& Y

2 A% B9 K3 @7 k% v# L$ A: s8 L0 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:+ [; j8 m" O) R& N& n7 C
咁難既=.="
, v& l* K" U9 B) A9 O6 g* h  \' M
[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]

; i9 s0 J+ {8 x- B( _, f( |$ H  b. X- C) z, Q
Thanks! 更正啦

littlenic

Originally posted by Triangel at 2007-4-18 01:26 PM:3 U5 \6 M$ v$ q# Q# W
第一個答中有獎
3 A  Y& L( n  m0 i" O: d, D, D  q& \8 l
(x - ...

8 z* A8 N; x/ }

$ I4 Q5 v, y0 I  K(x-x)= 0 ，所以答案係0，is it?

大大

Originally posted by littlenic at 2007-4-18 01:54 PM:
/ W* o( f" I% w/ ^- w8 j7 w; _- Z* w1 w* }# `! _6 ]( F: s0 o; f

7 m) Z4 j9 w3 k) e0 Z; m9 Q  p(x-x)= 0 ，所以答案係0，is it?

$ Y) R; _  v8 {  t  O
. z' o# p3 w4 E6 z# O9 O6 M

) I1 p& C9 F1 Y) S- \9 K4 m唔似a.math題
+ v" N! ?; l  ]  j; z% d" x. X0 g似IQ題=.=! P3 J5 R# f& }% O

2 F! g; @; a, C+ 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:
4 D- \6 k% y5 t3 \$ G$ P$ y/ V4 {, ~

8 K; |- {" W( R* l6 H6 {% x' g(x-x)= 0 ，所以答案係0，is it?

; _" V4 U4 b4 m- p7 c* ?- u& z' \" q0 Z' c& Z! }! s3 I! B2 z
Bingo~

waikong

我係學校個學生會單張見過+ }2 f: j. w8 W, n  i1 w
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.........) t2 N0 }$ i/ _# g7 F) U

+ j0 k+ k% N' N+ b: X) N5 E2 o  l這條問題，貼落吹水版，名副其實; A" x. B5 J! a$ F0 b2 I2 T, |

8 L! b2 |- K- M[ Last edited by karen0123 on 2007-4-18 at 05:51 PM ]