sakura310

Filename: DSC01158.JPG
: ~9 I* S! x( X* Y" D' S1 eDatetime | Downloaded by | Counts0 ~9 \. y( k7 x0 S( k
2008-01-18 00:25:24 | 阿感 | 2; n1 n; A; G) d- k: T! Y) C. _
2008-01-18 00:24:20 | playbr2 | 2/ {' w9 O' t' D7 F1 U1 {
2008-01-18 00:22:02 | 但丁 | 2
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/ c& ^2 |# i' H' h# f點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:+ k7 A5 B% z7 q* g
Filename: DSC01158.JPG1 z) }9 l; f) [( q8 `* E
Datetime | Downloaded by | Counts
. p6 C) r- P' J4 V  L2008-01-18 00:25:24 | 阿感 | 26 `) r2 @; }! n9 ?& T8 R% x# M  u
2008-01-18 00:24:20 | playbr2 | 2
# s* E  A+ o9 {6 }8 g. p2008-01-18 00:22:02 | 但丁 | 22 V6 D" ^2 ]* _: p

, K$ H1 h: P, B5 M3 @2 f, g* h點解大家都down兩次? XD

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我第一次開睇左2秒就close 左3 R; @0 U7 s) O6 ~+ m* h: E
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
* o. _/ D  D" ~: j2 y( c) ^Filename: DSC01158.JPG
: q% \3 D, l: B1 e8 r, A- xDatetime | Downloaded by | Counts: A3 l/ @- C/ ~% u- y
2008-01-18 00:25:24 | 阿感 | 2% \3 x. L" {/ J- H3 o: _6 k
2008-01-18 00:24:20 | playbr2 | 27 p, X' r/ r6 A$ x% A) X
2008-01-18 00:22:02 | 但丁 | 2- R8 v& k/ Z7 o

3 p6 Z- Z& i: t" r  k點解大家都down兩次? XD

9 L; N, E- e5 r$ ?& N, ]: n4 M( C% _$ j; {
快d捉我錯處
+ _; H. K% t3 t, e  j; T話吾定我都打錯 + - 符號. @0 t4 s5 c4 K# R
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
* y% x4 n4 |; X# f8 y不過,c=101n哥度(解除n係正整數的限制,只是整數)
8 ?: \. S0 T' g: D4 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~)
# n: r/ E2 [. w$ O3 m$ G知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題# j+ ^$ g2 i- O6 O0 e* |
但原先是不知答案,所以唔知有無失根
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有時見到題目都感到有點不爽; h' E4 o* X6 R- P
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9 F$ [& m# X) }; J* |# }2 j5 u
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....2 c& \% x% a' s% Q7 ?( u

+ |5 N* p( S/ A; p7 ?3 X8 c2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:. F* T, t2 z5 B- \
冇答案ga....& a( \2 Y& |: G3 X3 q: i$ I+ G

! }8 e' y& S" T/ C& @2條equation solve 唔到3個unknown ga....

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agree
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  b- B+ K5 t& K5 h! a+ D0 n2 equations 2 unknows
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: g5 d' u% `8 l0 P- \if 3 unknows there should be 3 equations " u- N* s1 N' g% t; d
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make it simple
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+ ?$ A* {% x: j. _say 3 D' T( y% |( E- k( m3 Y
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a + b +c = 3
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# a3 |# Z9 [6 N* c7 j9 v$ [a+b = 2' O7 v" g8 |# p/ R* t6 t' t. Y
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then c is 1 ( t/ v, ^  @2 d2 f# Y5 a# `2 T
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a = 2 - b 8 M4 e0 ?; b: \% X
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so 0 = 0 ) {- p0 d/ N5 c! f* l% M% P

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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
6 ?7 A9 B4 B- [4 K冇答案ga....
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2條equation solve 唔到3個unknown ga....

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! y; Q) a& b' G' Z, O6 ~" P/ E5 b此言差矣~2 z. z5 e9 J6 Q$ T! {# k; h8 t
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2條equation solve 唔到3個unknown ga8 w$ ~5 y+ P/ H4 S
還欠一個條件,就是3條equation都是linear independent(線性無關)的1 V. z* D* z+ E: Z4 l

( h2 k/ ~  l, j' O4 |- ~7 P簡單點說,多元一次方程就是線性方程的一個例子
5 f  E/ ~7 Z# ^0 H7 T# w& V" j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& n8 t- ^+ n4 u. ^

% p! U7 n: x6 g# g4 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~)
1 P$ N  E- a* ^  P1 `例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
; s5 e! {! o8 M) b有興趣就解解看& E' D: t: v; C6 e# Q
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:4 H/ Z, S! y7 O9 P5 f5 t. Q
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. l0 I* Q! i4 n6 O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:2 l/ W" V6 S+ k9 X9 s' R! h, F% u
捉錯處就唔敢當
# x$ }  t: m2 x! ^+ R9 `" n" c: m不過,c=101n哥度(解...

6 {/ a9 ^' d8 }  k: z5 r  c" d

" S9 H. [) B+ w2 g' w- U) a- \  D0 w- N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/ z5 p  m4 f7 s0 h8 Q
反而適當地調節一下 , 咁會理性好多. g  G, \. v( j& C, x" ?
就好似隻game 由12粒珠 加到13粒珠咁- Q9 E) l3 p4 i. W0 q$ y# h
當''堂''好玩哂
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7 s8 T2 B2 u6 p; S5 ap.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
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# B+ c0 s7 c9 T2 [! x% Yp.s. 求''堂''字正寫...

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已是正寫吧