sakura310

Filename: DSC01158.JPG) E6 ^7 r, s& T& m! X0 y6 E1 \: S
Datetime | Downloaded by | Counts5 K& |. P5 m  ]' h3 M  e
2008-01-18 00:25:24 | 阿感 | 2
8 V3 Q- _- g7 s. ~. E! h2008-01-18 00:24:20 | playbr2 | 2
9 s! {4 [9 j0 D. D. F6 P( g! v2008-01-18 00:22:02 | 但丁 | 2" m0 ~, \; w# {# N
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點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:4 ]8 W$ G- w5 k; e1 C: H& Y
Filename: DSC01158.JPG, K' O6 o$ V( i" H# {
Datetime | Downloaded by | Counts
6 ]0 V4 O/ o; I( ~" a2008-01-18 00:25:24 | 阿感 | 2/ v* W) E. @/ f
2008-01-18 00:24:20 | playbr2 | 22 c% |2 s; P& x& C, N* `" @" `7 ^
2008-01-18 00:22:02 | 但丁 | 2" J: @) a( R) l) k

' Q" P- ?! r+ }/ X- t  k3 v點解大家都down兩次? XD

8 ?. V; u" ?( z4 }1 V5 A( ~
  i2 g+ y" E  K% m  ~) v我第一次開睇左2秒就close 左
1 K2 F. k, e7 c" ^. ?" I之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:. R, g3 U% `! [+ B
Filename: DSC01158.JPG7 k. ?2 Q+ g; |6 D5 c$ r! Q
Datetime | Downloaded by | Counts2 T% U2 |2 q* Z0 s1 N: X
2008-01-18 00:25:24 | 阿感 | 2! r- I: g7 ?7 b" E( n; t
2008-01-18 00:24:20 | playbr2 | 23 \4 B5 C) ^. M- @
2008-01-18 00:22:02 | 但丁 | 2* W* K2 `4 x( f, A% L9 r) ^
; g3 C; [2 A6 a; b  h
點解大家都down兩次? XD

' I1 a' M; P1 z+ X7 I( [
+ h$ Z% w  q9 g快d捉我錯處3 y0 i  W* `4 [" ]
話吾定我都打錯 + - 符號
/ F# L' w3 e. L. V4 ~係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
% ]& j6 [# H5 {" _# o不過,c=101n哥度(解除n係正整數的限制,只是整數)0 N4 f0 _  I1 ?
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~)" E% h4 ]% c  G9 J, q
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題& @) r1 ?+ A9 E1 N( g
但原先是不知答案,所以唔知有無失根
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6 k2 H2 T" o& ^+ Q6 I, b/ V有時見到題目都感到有點不爽! b( o; A7 [# R4 y6 u& [: Q  s- D2 K4 Q
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
- Z" m; |  I9 X+ A" G; p/ h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....) f% B; S& m) C3 v: I1 G

' J* ~! u4 [7 R8 \$ ?2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
( h/ N0 f' H; T1 D: ^) U7 |# }冇答案ga....
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% ]% F0 m3 r8 I2條equation solve 唔到3個unknown ga....

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$ J9 f; ]% Q! K9 I3 f# Aagree ( S2 V. C% `2 p: ]6 m7 f0 o6 J

4 l& X% K% ~* E2 equations 2 unknows4 v5 g4 X, n3 P
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if 3 unknows there should be 3 equations . U1 Y" Y8 Z2 P2 R4 N) a

% h, ~$ p( a( f0 Wmake it simple
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say % v0 c* u; K, A. ^/ _; w0 E/ r/ F
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a + b +c = 3
+ x2 r+ x; Z" ]4 g/ B, K( ~/ l
0 t$ r* {' s# j) Y' {a+b = 2; l1 Y+ w% {5 R. s4 A
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then c is 1
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a = 2 - b 9 \( _. Q* c* l/ r6 J+ s4 t
8 m+ O$ F5 U: q' A: ]2 e, S, Q1 u
so 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
; v; t  C( k5 s2 J7 N7 L& m7 h冇答案ga....
2 v$ ?& K4 E$ M: F, G
6 b: U0 H* J6 L: j( O2條equation solve 唔到3個unknown ga....

. X8 [5 B4 Y* h

" J% C3 [2 l8 H1 K/ |& b此言差矣~
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2 l0 q8 D( K  \) f- D- K7 N" `2條equation solve 唔到3個unknown ga3 m% q/ S8 p; D; M
還欠一個條件,就是3條equation都是linear independent(線性無關)的8 V% w+ F- ]4 _; q6 L' V" }2 u. n. T
) D8 S9 T( H$ j" r% F3 O. j/ |
簡單點說,多元一次方程就是線性方程的一個例子
0 f' E) k' r+ R2 @" c& 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
# n5 p" h8 K& P" ]* r
+ L0 q: |6 m9 E. B8 C0 r- v% V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~)4 Q4 ?: p% f+ @9 T! ]
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解5 o/ w( @/ s) ]2 V
有興趣就解解看% d- a- @- \( p
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:
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不懂的話就問playplay,佢會知答案

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playbr2

Originally posted by sakura310 at  06:47 AM:
/ Q( z) K5 x; \2 n$ Z/ N( P捉錯處就唔敢當) v. l+ t! S2 I1 {) k5 w1 c9 k
不過,c=101n哥度(解...

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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
; T1 N. M9 H+ }$ A8 V- C) d反而適當地調節一下 , 咁會理性好多
2 v0 K2 ^' c+ p, ~+ X就好似隻game 由12粒珠 加到13粒珠咁6 B) r9 C6 N" x. D
當''堂''好玩哂+ N, D, j+ g6 Q3 z- I; @

5 ~7 p4 F* X# ]9 _: i3 r. X" Ep.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
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, j0 @% v# s( ^9 a6 _p.s. 求''堂''字正寫...

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已是正寫吧