sakura310

Filename: DSC01158.JPG* @/ v: W& V; b1 g( W+ U
Datetime | Downloaded by | Counts
# r, H) o: C  Q& R* A, P' N2008-01-18 00:25:24 | 阿感 | 2
& F. ^8 ^3 r2 {( P8 O( O" h2008-01-18 00:24:20 | playbr2 | 2
7 S& i: {* x1 c0 [3 M0 s9 ]% l2008-01-18 00:22:02 | 但丁 | 2
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點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
: S4 d: C2 c. [- L3 GFilename: DSC01158.JPG
+ q& h1 C# @) b4 m# ~+ lDatetime | Downloaded by | Counts- c# ]* u& T) [; s
2008-01-18 00:25:24 | 阿感 | 2$ A2 E+ U& q8 m1 P8 E' v4 L- ~
2008-01-18 00:24:20 | playbr2 | 2/ K' Q# ?  X  g! y
2008-01-18 00:22:02 | 但丁 | 2$ U7 U  W( M. ?4 F
* M5 o8 D6 E/ x- }
點解大家都down兩次? XD

4 @1 C: S3 `: i! [6 t* O
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我第一次開睇左2秒就close 左4 g6 _! X0 j* j, u: d$ Z) V$ t
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:6 M4 e1 Z# p/ D3 ?
Filename: DSC01158.JPG
3 j- }8 j) p) w) n' ^5 O$ p0 FDatetime | Downloaded by | Counts
1 ~. R1 _" F0 m. q7 N* W# V2008-01-18 00:25:24 | 阿感 | 2
* a. ]( v# {) k( J2 ]) Q2008-01-18 00:24:20 | playbr2 | 28 e! O6 P0 {( x% I: o+ ?
2008-01-18 00:22:02 | 但丁 | 2
4 `1 o' Y) R5 @( v& ?% g6 j5 T1 j4 I& Z9 p! `% y0 d
點解大家都down兩次? XD

6 r" }3 N+ Z8 s+ W. q! m" c0 `/ V

, b8 o9 t9 m5 M9 @快d捉我錯處: {* x7 w2 {1 r/ l
話吾定我都打錯 + - 符號
( t! ^$ ]2 l+ a係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
; P# }4 e' I- N1 _% J) r* }& V不過,c=101n哥度(解除n係正整數的限制,只是整數); N5 q; F# S! e# g7 S
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# A% ^5 ~/ A" F2 h5 E7 ~
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
$ P2 ~! f' n: a% t) \, j& n" c& o$ o但原先是不知答案,所以唔知有無失根  e. _; W& G* Y
. \  o, Z/ q+ D
有時見到題目都感到有點不爽
/ [- q8 S* L" u( I) o" x% [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
# x+ R: R, z3 O/ n, `7 @! S2 r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....5 Z8 l! S& F9 z# w

0 }# E1 g* }$ {6 j7 r- U2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
. G+ z, y7 i' O' E& |1 |冇答案ga....
! o6 [2 `7 k- ]  D2 Y- `# b6 U+ F
. J6 W$ ^* g* |2條equation solve 唔到3個unknown ga....

2 |1 c2 [& R' p3 a
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agree . o+ H' N* s9 a

) |$ j6 ]3 D7 ~2 equations 2 unknows. e6 \; L0 s0 R1 \5 j$ f
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if 3 unknows there should be 3 equations ( u8 ~& j) j6 s5 J$ H! B3 g" F
$ D2 ?+ A4 m+ [- R
make it simple
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say 4 s6 |& T  S7 o

* ]' A8 O% F; T) V  H+ Pa + b +c = 3+ r% m& ?6 s% p" e) ^

2 t5 e' C* H" z3 `- E2 {, Ia+b = 2
1 ?0 B0 ~6 v& Q  o, z# ]: j) L1 X# e6 P% s7 J0 I! V3 \7 ]
then c is 1
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' l; q0 B: [; C9 ua = 2 - b - p( k' r9 I, ~+ @( @5 ]( X9 V
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so 0 = 0 ; J; p6 @$ M+ [. B

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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:7 I1 T9 |% L" }
冇答案ga....! c" W& R2 d4 H  _' b5 w

8 [2 c( A  {7 P2條equation solve 唔到3個unknown ga....

+ d" T* \& Q/ ]

  Q) T# g9 O9 Z( E( Z! e此言差矣~* H. R- ?$ |9 {- u
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2條equation solve 唔到3個unknown ga
6 X. ^! j/ c  D+ H, \  v還欠一個條件,就是3條equation都是linear independent(線性無關)的* O, C+ \/ g: f' M7 a: q% V

0 b0 ?& A) |( x4 p' A8 S1 ?; Q* l簡單點說,多元一次方程就是線性方程的一個例子  q6 a) j& f3 k# G* v/ G; l, R& 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
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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~)& e4 `. S: ~3 b; O& H9 d1 ]
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解& }& E1 J$ Y& e: E4 S+ n
有興趣就解解看
. o5 ~8 e4 W; [" H不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:0 i* P# q/ @& \/ ]; {) ^# G, M
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& ~0 J! b+ _0 f2 o6 E) x+ A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:0 |1 E& Z2 S% W+ E" n
捉錯處就唔敢當8 \/ E6 u3 |* g: j  ~; b
不過,c=101n哥度(解...

$ u2 |, v! H$ i2 R, _* r9 A/ ]! X) C+ i" x
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
  F8 i# A, [. x3 k9 e% ]5 Y; ?反而適當地調節一下 , 咁會理性好多8 m+ D; ]8 S9 u5 E
就好似隻game 由12粒珠 加到13粒珠咁( j& \' {2 t0 ]  E3 U
當''堂''好玩哂  F3 `& l- p# c$ k. G) A4 w
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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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% j9 I. c, A1 T) \6 zp.s. 求''堂''字正寫...

4 O: p4 @0 o' m" _3 J已是正寫吧