sakura310

Filename: DSC01158.JPG/ G4 |9 {5 T6 T* q& B: I# C
Datetime | Downloaded by | Counts( A. ?6 ?& [1 b7 Y" X3 v: q8 \
2008-01-18 00:25:24 | 阿感 | 2/ m' E5 ~4 J/ e; [! d3 b
2008-01-18 00:24:20 | playbr2 | 2
/ |0 Z+ |& r& Q/ e2008-01-18 00:22:02 | 但丁 | 2- r; E3 k! u& g/ x

0 K$ C3 s8 c0 W3 Z: V點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
) a2 T" _7 e. gFilename: DSC01158.JPG
& V0 B: e  Q+ m$ [& dDatetime | Downloaded by | Counts  O  }: \4 h  a& X# \! I
2008-01-18 00:25:24 | 阿感 | 2) U0 a' r+ m, p  \( e- [$ {
2008-01-18 00:24:20 | playbr2 | 25 k1 Y3 g, E5 z  P
2008-01-18 00:22:02 | 但丁 | 23 y( u' ]  o& l4 \$ K' D! i0 [

0 b. `4 o" `5 o8 `& |1 _# f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
  q) S, J0 z0 [之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:* Q0 |& @0 l8 n2 |3 |7 Q3 k: x' ?
Filename: DSC01158.JPG+ X* X4 t- F: Z0 t4 ~' I
Datetime | Downloaded by | Counts
) l1 T0 N8 ~+ J9 ~: o6 P9 L- v2008-01-18 00:25:24 | 阿感 | 2" M; i0 o% D( i2 l- m( Y5 K
2008-01-18 00:24:20 | playbr2 | 2& f+ U- ?$ I( y4 ]
2008-01-18 00:22:02 | 但丁 | 29 |# n  m6 Z( r' R
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點解大家都down兩次? XD

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) J1 i& _6 K" A  f: a; N/ Q# |快d捉我錯處
# ?4 [* y. G& F6 R( n5 t7 c話吾定我都打錯 + - 符號
0 f! A+ n6 g' z" X2 F係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
/ N, G$ t6 {+ Z6 n# x6 {不過,c=101n哥度(解除n係正整數的限制,只是整數)
) X3 s5 P+ d4 w. J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! Y0 M6 m- h知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題6 B0 ]$ m) V, Q; ~/ K' y' ]
但原先是不知答案,所以唔知有無失根' G3 `% ?+ q  s
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有時見到題目都感到有點不爽* _4 I& G8 f* k/ G* E
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7 G6 q. s, |6 q9 }( `. l
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....
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5 Y* z; Z/ O+ Q( q# m2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
- @+ C; z  K. M冇答案ga....
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. T; l: ~$ u9 W& p  ^3 H/ @, V2條equation solve 唔到3個unknown ga....

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5 H3 e% [# K( V5 Cagree
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2 M* J- u' Z" Q$ ~  _: M5 ~6 u9 G2 equations 2 unknows
* E7 a2 |& g4 c* u8 F& c
$ G, `8 Q* `5 t2 h7 xif 3 unknows there should be 3 equations - }7 q  ^% w" \/ p- p. |% d
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make it simple
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say . }  N$ p8 Y2 Y0 ^. z  ]4 M7 H
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a + b +c = 37 f: e$ L% |- b$ w4 F

( J+ R3 a; T/ B+ E" `; S) L+ s7 ja+b = 2" ~1 A6 T5 ~  K  @
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then c is 1
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a = 2 - b 2 \- ~- t  w$ d$ J" |
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so 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:# e; l) u2 c# N4 G9 z% G4 e2 x
冇答案ga....
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1 c3 D0 g  m. d6 C. R+ z: ?. v" Q2條equation solve 唔到3個unknown ga....

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此言差矣~/ w  [, E0 K8 R' _. H
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2條equation solve 唔到3個unknown ga+ P, W0 u/ K  P/ x* ?$ V) F4 `
還欠一個條件,就是3條equation都是linear independent(線性無關)的
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0 n. ~7 f" v2 q" N# Q簡單點說,多元一次方程就是線性方程的一個例子
5 O8 ^' k& {6 B% Q* s$ L  X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3 d( F  ]$ P7 g& \

* `$ }! X3 |0 E  C# E7 x1 i; f$ s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~)
5 M9 m4 v+ V; V例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解& a: j1 j4 s' p$ ]) M
有興趣就解解看2 k. T2 ^) E+ }7 P% @9 n. F2 R9 p4 M$ ]! G
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:. ~4 U. c5 z$ @4 i6 C% M

  k% ~1 a$ y% |( a8 r1 @- L) \  V+ t8 F& D) O, F. n' h
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:# g3 Q, L1 W% X& k, B* L$ N: R& E
捉錯處就唔敢當
# C0 |( ?9 u6 F' ^+ ^不過,c=101n哥度(解...

9 j1 }% E# [9 p( e( h9 P# z1 Z% b0 u, y- d" C  B3 z* ]
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
: r/ V' @# f. m  r9 L9 q反而適當地調節一下 , 咁會理性好多. ?' O$ d4 x% Z+ ]8 h
就好似隻game 由12粒珠 加到13粒珠咁0 m: ^/ L/ j9 \3 ?7 x
當''堂''好玩哂8 ?# L+ g) b3 L0 }0 R& h! `/ @+ K. A
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p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
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p.s. 求''堂''字正寫...

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已是正寫吧