sakura310

Filename: DSC01158.JPG6 t5 w9 t* L# x0 t( M
Datetime | Downloaded by | Counts
. Y7 c9 S3 Z8 n, P7 _2008-01-18 00:25:24 | 阿感 | 29 \* a. D) i& P$ K, h7 K
2008-01-18 00:24:20 | playbr2 | 2# S0 F/ l; b4 F- H2 I+ Z
2008-01-18 00:22:02 | 但丁 | 2
2 O5 ]1 ?6 O5 e7 z
9 n9 z, x  v8 W: H點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
) |8 W* f* m# W5 n- \. y7 dFilename: DSC01158.JPG
# Y, S# j, m3 T8 `* FDatetime | Downloaded by | Counts
, E5 p$ |4 F! o2008-01-18 00:25:24 | 阿感 | 2$ j/ f/ k9 t1 A% T; K# _
2008-01-18 00:24:20 | playbr2 | 2
8 p7 z. U% a8 S% F2008-01-18 00:22:02 | 但丁 | 23 @% u  d/ b4 m1 ~
3 D/ J. `9 \7 Y2 i: h1 }
點解大家都down兩次? XD

0 S; N' r/ ?) ]7 G
$ z: g1 e& Q2 X4 Y5 w我第一次開睇左2秒就close 左& I: l+ [; A7 R: N1 b& W+ d
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
: S8 P/ ?: p, t3 J7 y/ J2 cFilename: DSC01158.JPG( l% x; ^2 u% H, e& l9 e8 C6 H( t
Datetime | Downloaded by | Counts
3 K# s4 h3 [- i) L% W6 S2008-01-18 00:25:24 | 阿感 | 2
( K6 K, H3 K* w2 D: f; R4 G3 D2008-01-18 00:24:20 | playbr2 | 2
" W! R( {% q% g: A. p/ ]2008-01-18 00:22:02 | 但丁 | 2( P0 m0 ?! u$ q" d" U7 u

6 m# t* R) B4 p) j4 L/ r& _- X點解大家都down兩次? XD

' _$ `/ |6 L! V& q, N% B; z4 O6 j/ b0 `- c& u5 [* o
快d捉我錯處
$ i+ l; w$ r, }) X$ X# w話吾定我都打錯 + - 符號
4 d6 x+ c4 o6 T# Q( Z- e係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
$ D. _+ |7 Q( a  f, O不過,c=101n哥度(解除n係正整數的限制,只是整數)
- C3 _: X% ~7 l2 `) s! H" q7 O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~)
0 _) C+ p$ O% H9 \+ V" K知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題$ K5 w1 Z; c- g( ^2 V
但原先是不知答案,所以唔知有無失根
$ z6 J2 r7 Y$ M/ h& c* ^: k: G
9 \  U, d# t# g6 {; o有時見到題目都感到有點不爽
7 q0 m- `& a' L7 a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
; `4 W: L8 y. D& i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....* X3 ]3 ^+ m/ M5 x3 o7 c+ O8 P

: v& F  j; ]8 ?( Z2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:0 A/ P5 B! H( |
冇答案ga....  D# j7 B2 `8 {# [* L: F  Z

; l4 n' {' ?& ?5 }2條equation solve 唔到3個unknown ga....

" S( A# T2 G. y2 N* i: ^  `1 \# V. Y. Z/ \8 k; |) g
agree
' F1 e7 Y1 y4 c4 Q: L" w2 B8 c0 {* c. a7 R$ T
2 equations 2 unknows) O) D. F2 c+ ?' E: y; f
, p/ z4 A1 r; _! A* E
if 3 unknows there should be 3 equations 1 m/ C: R' d8 P" J" ~5 a3 i# O

, T! @8 F  [) Y! ]( ?# U* N" Jmake it simple
, J: G; S/ |/ z4 ~
8 y: m( X( b$ ?7 d; x. Isay
( v5 x% L- I! c5 L
6 Z9 s; ~5 w. F7 @. Ua + b +c = 3
8 x9 U4 n5 W% p' f+ S0 W9 p2 K* j9 `
a+b = 2
  S$ I) e' C2 C( E
, R$ J7 n( K5 Z! x* v* Mthen c is 1 / D$ v1 L; X, X) K
- F2 H+ D# g3 D" C8 ]
a = 2 - b
# y2 q$ d& l. q3 u; B, E0 n9 @
& }5 S+ _$ e. B1 a* ~so 0 = 0 $ U8 n$ @# ]' j1 p( n# A3 }" i
. b- b+ i, m6 P8 [0 \3 [8 o

sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:$ t" q5 r. G# @, L5 ^. e
冇答案ga...." N2 O: p" n* S  }3 |/ [0 z& J
: ]7 S, i$ b5 L; t" S9 M/ z
2條equation solve 唔到3個unknown ga....

9 m  L7 g' c$ E5 _( M, v% D9 B

1 U( N+ J. U1 [0 a# l; k此言差矣~6 j6 X$ D, x9 G4 y2 E  D
6 q* {$ `: N- E6 S/ b% t
2條equation solve 唔到3個unknown ga
- |' `5 A5 F9 J: U- f4 h6 T! p還欠一個條件,就是3條equation都是linear independent(線性無關)的
! E1 z9 f! s" Q* J0 i5 v$ `, M: Q7 D3 `
簡單點說,多元一次方程就是線性方程的一個例子6 n1 V6 {* r0 r% Z- P) L' Z" C0 b3 G
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
" r% Z, b4 ?  x& D, c
' p. _- E/ L* c& d6 u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~)
. p; b# H9 `" z1 \( p. {例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解/ W9 W! ]  Q% h3 V
有興趣就解解看
' m, N' V) Z' R不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:
0 {+ Q7 Z' X* }6 C, h9 V) @' c' [! @- O& n5 I& G
2 `% K% c. u/ l; d' }
不懂的話就問playplay,佢會知答案

. {1 x3 o# n% g
$ i0 \4 M' Y# z

playbr2

Originally posted by sakura310 at  06:47 AM:
0 W! H2 ~0 L+ }9 B捉錯處就唔敢當
; f8 B8 |6 u9 n% r不過,c=101n哥度(解...

/ ^$ b4 b$ M2 K( L  y# ], Q* S' X4 i+ ?' q. y
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
* _6 M1 Y7 n5 Z$ P9 b反而適當地調節一下 , 咁會理性好多) `* r6 A& \) v, f# b* `  A
就好似隻game 由12粒珠 加到13粒珠咁
0 F/ k8 S  G, q+ c: B8 f* ~! J當''堂''好玩哂
8 X) a6 ]' Q5 x: t" A: k$ f, Y
" E- d6 `: V- M- op.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:3 p, A- u" R/ a2 Q4 K7 z1 m
3 h( m7 S  R' _+ `

8 @7 [( |! j7 @/ Wp.s. 求''堂''字正寫...

" c. R/ T0 R, y. {* [$ X% ^7 q  r已是正寫吧