sakura310

Filename: DSC01158.JPG  e$ m; K& z. f2 r
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4 Q) [5 u; P1 g8 k9 S6 u) {2008-01-18 00:25:24 | 阿感 | 2
) i& a9 J) j/ U6 }2008-01-18 00:24:20 | playbr2 | 24 ^' T4 O3 w+ K
2008-01-18 00:22:02 | 但丁 | 2$ f+ Y: Z8 o( a$ L( N) d% C& X  x

" j- V. b& ]" @% W4 r4 U點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
! z7 L& p$ q4 i! G8 G9 hFilename: DSC01158.JPG( M+ P# G& E7 ]1 D9 v/ s( {
Datetime | Downloaded by | Counts, \+ }4 Z  O9 T9 i" m# C2 D0 q
2008-01-18 00:25:24 | 阿感 | 2
: {( y% z0 G) q2 X1 m2008-01-18 00:24:20 | playbr2 | 2
8 G% m" T& L. j! Q& \% Q. i2008-01-18 00:22:02 | 但丁 | 29 i4 }9 j2 M; `0 x: ]' o
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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
, [7 k! t- \6 q; j+ Z  c之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:& t7 g' F1 f2 ~% t' R
Filename: DSC01158.JPG
8 h1 l1 u7 h; c" t1 e' yDatetime | Downloaded by | Counts( R. I0 R2 H' m1 W. p1 h# u
2008-01-18 00:25:24 | 阿感 | 25 c$ n" x6 }/ O# S
2008-01-18 00:24:20 | playbr2 | 2
( \2 a$ X) W( e) M. i2008-01-18 00:22:02 | 但丁 | 2
7 ~, c- j7 U# r( R5 j( v! {7 w, |$ G. j! A" ^
點解大家都down兩次? XD

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快d捉我錯處
+ ^5 d& c) o7 I0 f# l3 l話吾定我都打錯 + - 符號
$ {8 E& m* t6 |3 p7 |係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
$ }4 l- V+ S" O不過,c=101n哥度(解除n係正整數的限制,只是整數)
1 Q/ _6 }9 v1 q- p  X  A* y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~)$ |. [: o: J5 d8 T# D( G: X
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
, ]1 J; L) e" M! t3 x但原先是不知答案,所以唔知有無失根
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$ P& h( P6 u: E6 Q有時見到題目都感到有點不爽" f1 \# b3 C/ p1 Y9 S: N
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* N% A4 W  r9 ^' Y+ ^
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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2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:8 A" @. D7 u2 I4 x3 q2 y2 s: @3 j
冇答案ga....* a' X; D  m+ @
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2條equation solve 唔到3個unknown ga....

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. F0 Z/ P$ a; i) X# tagree # G2 `8 x- Y- U7 s! D& }

4 O$ d/ R( M- U2 equations 2 unknows5 g0 _! l  W  ~4 I

2 Z, Z6 F0 u; U9 K+ @9 ~# Sif 3 unknows there should be 3 equations
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8 U& ^, t. D1 P7 Y/ e% omake it simple 2 d1 f6 B. g! H1 T3 {5 A

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a + b +c = 3
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a+b = 2
9 i7 l5 l4 Q3 N5 d4 [8 p$ j5 E+ U9 Y4 i) c# I2 M1 M8 ~
then c is 1 * X5 W+ h' D8 a4 C' M5 x, ^, Q. @
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a = 2 - b " Z# ]+ C3 J0 u# t

% ^) `+ I, U! B' F5 X0 G' H% A* uso 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:2 j9 ~3 ?9 _0 e( _+ U# |
冇答案ga....2 {# l1 d' C* N- R3 F
9 ~4 s' {1 Z7 I
2條equation solve 唔到3個unknown ga....

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8 `+ O! P0 q; t此言差矣~
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2條equation solve 唔到3個unknown ga5 u8 a4 Y! N: G. O! n; V/ ]
還欠一個條件,就是3條equation都是linear independent(線性無關)的
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簡單點說,多元一次方程就是線性方程的一個例子
. E2 }" M4 q+ D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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! J  y9 W1 w# h8 x: @7 U. m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~)$ ~7 ?2 }# g" z* y* Q
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解: M2 z* {5 j5 ]$ M2 Q8 ^5 H
有興趣就解解看
  q  r, \9 f9 u3 O  P. i不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:1 _* S1 J' H3 c% S, R

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3 X$ U, y! d- B1 U+ e7 Z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:
% |' t+ A( b8 E: l$ B捉錯處就唔敢當+ r" `. L. @1 v4 _6 h
不過,c=101n哥度(解...

6 U+ _  _. e) a8 R- S

, t2 i* ^* }/ F1 Q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
- O! I( ?/ o* B2 ^反而適當地調節一下 , 咁會理性好多9 n9 f0 C' c2 B! y/ c
就好似隻game 由12粒珠 加到13粒珠咁
1 h, m/ I+ v; k7 V) a8 t當''堂''好玩哂
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8 ?) d$ q6 l. cp.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:( L. {0 T3 k/ }7 r$ a9 |

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. k0 g2 `, h: Gp.s. 求''堂''字正寫...

2 k8 J* d* W/ H- a3 v- ^& F已是正寫吧