sakura310

Filename: DSC01158.JPG* e1 N$ [* ~$ O/ b' x# o
Datetime | Downloaded by | Counts% `7 V5 J' j1 D+ y, [( j: N
2008-01-18 00:25:24 | 阿感 | 2* w  v! W& [/ S$ d  Q
2008-01-18 00:24:20 | playbr2 | 23 j3 q" V, Z. W& q- a9 N3 R1 `
2008-01-18 00:22:02 | 但丁 | 27 t7 Z/ g9 F1 V2 c. n# Y' S( F

3 R1 a8 ~- _, X) m+ ]2 @5 R2 t3 J1 S點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
1 `, k1 N! ?' p; M+ LFilename: DSC01158.JPG
& J% j$ R$ ^1 m! Z' w; T9 ^4 |Datetime | Downloaded by | Counts
1 `  c- ~1 U$ L1 x2008-01-18 00:25:24 | 阿感 | 2
; d! P$ m6 o, d( X; i, U2008-01-18 00:24:20 | playbr2 | 2% R; ?' W2 |- F# @) a
2008-01-18 00:22:02 | 但丁 | 2
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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
+ V0 u; X3 A* F5 ^2 W$ s7 {之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:/ d# p- g8 z4 k% a. ~; r/ R  J
Filename: DSC01158.JPG
& ]" r' }! {" f4 K4 U& i1 DDatetime | Downloaded by | Counts+ G6 `; @# c4 n; Y' R
2008-01-18 00:25:24 | 阿感 | 2
5 u% s! W7 ^0 M2008-01-18 00:24:20 | playbr2 | 2
. G2 u4 n! h  F' z: Y2008-01-18 00:22:02 | 但丁 | 2
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* D+ x* T& y5 O點解大家都down兩次? XD

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快d捉我錯處
8 C2 R9 N( y" d' p; A: Z話吾定我都打錯 + - 符號
7 `2 W( X: y9 e  L9 l; H係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當8 I' q' o0 n2 H6 o4 V. B
不過,c=101n哥度(解除n係正整數的限制,只是整數)
  w  F) `4 i% X) N# w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~)
: Z1 l# q; ^1 V7 [% `6 Q知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
1 k7 z$ l1 n: p& t- j6 G2 r! W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( k* c2 q: I/ @, K
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 m% N  P/ H2 [8 m( I5 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....& k" u3 @2 X2 [5 a+ X' A! B" n/ n
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2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:& ]  X# T- v8 w9 A
冇答案ga....7 o2 B! u* k0 X, ]( w& ]) U6 N
- E( y+ j) G  g+ x
2條equation solve 唔到3個unknown ga....

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agree ' i: k" _, t( U: b6 G+ O
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2 equations 2 unknows; @/ Y+ y* F5 _0 j( _- F
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if 3 unknows there should be 3 equations ; ~+ c9 p, P! R- j4 K0 D- i/ F

+ G) f3 Z) U& q7 Y( j' V6 \5 B4 {. Hmake it simple ( Q9 U) w. L3 N  x6 w; f0 {; @, J

9 E5 k' `5 q6 v! usay
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a + b +c = 3' ~4 f# ?' f* O

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' ]" S  A9 ~4 k( x4 v8 T6 V; i6 a! `then c is 1
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0 X3 R9 O: f, E% \' A+ L0 ]a = 2 - b / E! n1 u, h5 n2 ?# r
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so 0 = 0 * J2 N; R8 J- H9 G

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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
8 o0 ]2 Z" X1 ]+ G% e冇答案ga....
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, Q, k" O" L5 A2條equation solve 唔到3個unknown ga....

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此言差矣~4 p, i2 l& d  ~/ b5 h4 @8 c" }
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2條equation solve 唔到3個unknown ga/ o6 B- r& H% a' L8 H! C' Z- `
還欠一個條件,就是3條equation都是linear independent(線性無關)的; O) s& c) t: e

8 T+ ~, v+ m( U+ l; o簡單點說,多元一次方程就是線性方程的一個例子: r' j5 Y+ e+ w" E
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
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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~)
/ [$ t2 l, M. o! k* T/ i9 C2 r例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解% u# H( P+ ?* t" O) Z/ Q
有興趣就解解看
3 U0 j) i/ |  ]/ z4 }9 {+ Q, ?7 r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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+ N- V% X5 y1 u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:: \- p- K; X* y$ _$ Y; L
捉錯處就唔敢當! H4 X# c2 k) Y! X
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
* m! A; r; @( J, G& R. d反而適當地調節一下 , 咁會理性好多
$ t  C# w/ B& t4 j就好似隻game 由12粒珠 加到13粒珠咁4 q6 R) ^9 e  W
當''堂''好玩哂. K( v4 [( D9 W" w/ w, E4 {/ O
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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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4 X7 w5 ~% |$ T9 [% xp.s. 求''堂''字正寫...

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已是正寫吧