sakura310

Filename: DSC01158.JPG
5 N) a1 n, _  X# zDatetime | Downloaded by | Counts
% _3 Z3 H+ V% k, s. X7 W- i' V+ r2008-01-18 00:25:24 | 阿感 | 2/ a3 _. l  e- m* k$ G+ l5 ^
2008-01-18 00:24:20 | playbr2 | 2
7 n4 @4 q; p) a$ P! C9 z: M2008-01-18 00:22:02 | 但丁 | 2& r0 U+ y0 Q) Q+ u1 T
+ a) N3 b: S; B7 R+ ^! g
點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:. F5 c4 F% B% |$ w! f
Filename: DSC01158.JPG, K  b$ {4 ?! Q( R, M  C3 i/ @: r
Datetime | Downloaded by | Counts
6 k1 x: L. o0 D2008-01-18 00:25:24 | 阿感 | 25 r; k2 J1 ~. r! m1 E
2008-01-18 00:24:20 | playbr2 | 28 @5 ~$ P6 s) b+ ?# t. i3 W
2008-01-18 00:22:02 | 但丁 | 2
! B2 Q7 `+ Z# }& u' W" R
3 @  E5 e. D3 d" r點解大家都down兩次? XD

; X- A9 _) ^; \8 P4 C( N  c! M  A3 }& U% b% \/ B
我第一次開睇左2秒就close 左
1 l/ d6 x' v9 b之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
- v1 v$ }8 n0 B0 DFilename: DSC01158.JPG
% p; I$ o" v% i4 F- BDatetime | Downloaded by | Counts
2 q- {+ j& j, W! E6 d% |- o2008-01-18 00:25:24 | 阿感 | 2& y& @& r% W. g
2008-01-18 00:24:20 | playbr2 | 24 c- x1 V' D4 E( u' _' x
2008-01-18 00:22:02 | 但丁 | 2% x% m1 L% p1 b/ Z5 n1 g* r2 W

$ y/ p2 j1 f) p* r% x3 H$ F& s點解大家都down兩次? XD

: K# ~; ?/ }9 U" N# s
) o4 z5 H# I2 W
快d捉我錯處
" N8 ]$ v0 n, O$ h* O2 _. g; S6 y話吾定我都打錯 + - 符號; h0 j& y3 Y9 u. u5 R
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
- ~# F. ]4 v0 K. f' q2 ~9 c不過,c=101n哥度(解除n係正整數的限制,只是整數)1 @9 F$ c. K2 S* B
就一下子限制左c一定要係101的倍數(好像看懸疑片,突然劇情說出一些事前沒提及過的線索,不爽~)9 z: l; {4 S- m; A* z
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
- R1 _7 Z; w/ n: u6 [/ d  v但原先是不知答案,所以唔知有無失根
' {. v0 P7 ~" {- h* i
3 [# x9 }0 F: D7 ]: v, v4 Q有時見到題目都感到有點不爽
, `# X3 |1 r  Z( T8 `. d+ S- _9 r+ ]題目所求的答案是整數,正整數,有理數,實數等等應該說清楚
$ q0 ?  ~) S. f! }有些題目,整數解和正整數解分別好大的說,要找出整數解集有時可不是件易事= =

cutec

冇答案ga....
$ U& o1 c& t& a
0 ^( {  b; X8 S, P2 K2 g2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:, T7 I2 M2 |0 l, p
冇答案ga....
: `$ L: i9 G. h5 Q( Q. t  f) ^, T$ C; Y) g
2條equation solve 唔到3個unknown ga....

% R1 y' P) k" v' |/ E$ m

- e7 E% g$ ^: ragree 7 h- p1 }' D( \$ c6 S

. Y8 u6 |8 R1 V2 equations 2 unknows
; i! D: z# q: @* M9 F- g; D7 @* J( A, b6 P# T
if 3 unknows there should be 3 equations * ]. ~. b) ~) O; @$ k
3 a1 p( m- d8 T
make it simple 7 @( ]' L- m5 s( w( F' Y9 T5 b7 t
2 t9 I+ Y) M) B
say 3 B5 ~6 \3 \3 l% t+ a

4 {$ ^9 `% Z, t2 e  Fa + b +c = 3
& U+ k" X7 G2 R/ a
% L( A5 y$ v7 y+ wa+b = 2
4 X; k: e! T+ p2 M
; g& g7 v% O! U% @8 |* q0 Bthen c is 1 . x+ c* @+ {' d
* W* F9 f* K; t5 L# f. J7 R8 @
a = 2 - b
+ L' ~3 m8 q3 n% [
" k: M6 |/ ?, Wso 0 = 0 ' M# E4 w* j; _: ~. q4 x1 k
# Z- w7 x/ |0 B9 u8 G

sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:! j) m' E( t+ `0 H) k
冇答案ga...." T9 [4 Z9 d7 Z
2 {2 S: L5 s5 g$ ?3 q7 |$ O6 h7 a
2條equation solve 唔到3個unknown ga....

" }0 i. U6 i7 \1 ]' N% u5 [2 a8 o  _4 D2 v3 u8 D4 v: D+ t
此言差矣~
! Z) m" G4 _$ H9 p- s9 v$ g% A4 `5 n' z, W
2條equation solve 唔到3個unknown ga9 K/ l. M; x1 {! `
還欠一個條件,就是3條equation都是linear independent(線性無關)的' c: O  t& A/ o# s  h
* n& T6 B# K1 e2 M" i
簡單點說,多元一次方程就是線性方程的一個例子
" C- w7 c( n) s在這情況下,當然是想求n個未知數,至少要用n條線性無關的方程" g* J% k% W4 t
& L4 t* ?& z# E; L1 V5 z
如果不是線性的話,有機會1條方程解3個未知數的(這不是每次都可以的啦~)7 x3 c! S( c& Z! C" w7 d4 `- m
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解7 O! P: t  f& P! B5 v4 t
有興趣就解解看
6 L4 I  }4 X5 |! n% [; m不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:) |3 L% K, E2 G# `" U3 U  e

0 A$ r' a3 I; k( c
. N/ [7 P- |$ N不懂的話就問playplay,佢會知答案

2 B5 h/ m3 U4 B$ h; k

. M$ g1 U' @7 O9 k, k' W* N

playbr2

Originally posted by sakura310 at  06:47 AM:
% v# G! u5 X# d- X9 C捉錯處就唔敢當
8 a# O+ L+ }  e不過,c=101n哥度(解...

* R2 A/ R8 @# J3 B) L

  ~/ B  ^8 j3 J都係睇餸食飯姐 , 無理由因為題目冇同你假設就下下大包圍架
( D1 A. W, u) d) h; v反而適當地調節一下 , 咁會理性好多3 X( y: L. l/ j! |6 G" D) a  u* e! f
就好似隻game 由12粒珠 加到13粒珠咁, X9 d- h! `5 |
當''堂''好玩哂1 {+ r" M3 m0 L* q- o+ J! Y# o2 b

' r' m( P! |- J( u8 ]p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:& m, Y; q# i# S7 E% A7 s/ a
# F5 O3 \2 H3 o( Z. H

' F, i. y+ W, ^- K( gp.s. 求''堂''字正寫...

: v  A6 o8 p1 k. {$ _! @/ q. f
已是正寫吧