sakura310

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" h' R+ v/ I! Q: d  j6 u4 @- Q0 y2008-01-18 00:25:24 | 阿感 | 2
/ ?" H$ P; g% P: q7 W, D, H2008-01-18 00:24:20 | playbr2 | 2
2 }: h- `5 A: O9 J7 `, p2008-01-18 00:22:02 | 但丁 | 2/ C% Z+ Z3 H( V* n& a! s, y' e

' l8 {/ s! @% _9 r2 {- T! ]* ?( q點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:1 s5 G3 R, \+ W! o0 o2 i) _3 D7 D
Filename: DSC01158.JPG! ?- B& o$ y# M/ D8 t; h  @
Datetime | Downloaded by | Counts: j6 J" F0 `+ S5 _" ?( n
2008-01-18 00:25:24 | 阿感 | 2
, @5 A( |( c& [2008-01-18 00:24:20 | playbr2 | 2
9 _8 @6 z0 L, g9 Z/ t2 b2008-01-18 00:22:02 | 但丁 | 2
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, U5 z! v% N0 J2 ?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6 b' ]  d2 P! q+ D3 Z% ]/ ?( e
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:, R6 K: w9 y9 M
Filename: DSC01158.JPG
/ ^0 s+ q2 M8 E( G. x' CDatetime | Downloaded by | Counts& ]$ @3 C0 Q" {7 t' r4 h1 E: h
2008-01-18 00:25:24 | 阿感 | 2
4 D4 d  P5 l' n$ ?: _, w2008-01-18 00:24:20 | playbr2 | 2
/ z# ], E# T  G# \% e3 T  n$ l2008-01-18 00:22:02 | 但丁 | 2
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點解大家都down兩次? XD

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快d捉我錯處$ j7 E/ N0 V/ J: R6 D  o# X1 e: m
話吾定我都打錯 + - 符號
/ J* `% t* ]0 r1 z! S! p5 {! Q係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
, r4 Y1 s; W* Q) q3 ~不過,c=101n哥度(解除n係正整數的限制,只是整數)
3 E5 N$ _1 Z( o( N1 J; n! g: E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~)
2 f( f! S$ ~8 T& ^- h0 i& B7 I知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題- G! G' \) R4 U  Q. B* y
但原先是不知答案,所以唔知有無失根1 s6 x. V- L& d  x" r- }% g$ I  _
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有時見到題目都感到有點不爽! d, C" c9 G: U
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5 b& |1 P6 f* T$ o# 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....5 I( `8 d- e( e/ N5 [
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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:
9 D3 e' v9 a1 [8 b, Q8 {冇答案ga....
6 k. q7 f- S7 m9 L. Z  h/ f0 I3 a# Q$ [  k! i# J* N$ ^
2條equation solve 唔到3個unknown ga....

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agree : B+ x) Q4 v( l% @' Y

+ ^* C- k3 J' |& t8 V; q2 i; w2 equations 2 unknows
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; e1 b) \+ C) Vif 3 unknows there should be 3 equations 1 `% H5 C3 v+ O+ h. j+ q

! {5 I$ ?% Z: |3 a* emake it simple
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say
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a + b +c = 3
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& Q$ k; d% f. p% C& Ea+b = 2$ [) t2 ~$ A9 }+ y2 c7 V

. E- p$ P4 R2 L& N& {) q+ Hthen c is 1 " u; `6 @6 S. m5 T- i

' `3 @: H4 K5 P+ R0 |) c; fa = 2 - b
# [6 ?. H- X7 ]! J- G) I$ b
# [1 Q  m) n, D$ f7 @0 ?$ d" iso 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
# T( U: p- M, C# u# o冇答案ga....
9 s( M8 ^' `# h+ M% H& J' u$ L& Q4 m5 E! Y  o; @
2條equation solve 唔到3個unknown ga....

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此言差矣~/ B+ ?  [$ Y# ?% ], Z
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2條equation solve 唔到3個unknown ga3 g/ q* c. K- }: }* }. U* Q9 I
還欠一個條件,就是3條equation都是linear independent(線性無關)的
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" Z$ x9 ?4 I: r. E' C簡單點說,多元一次方程就是線性方程的一個例子; Z8 c. d) L. g+ b
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: S. a2 s5 y& p# t5 `& C' N+ w* k2 l

  O. P! T& @; o0 {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 Y! d8 f; @$ f; z$ f
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
* Q5 v; M+ Y* s  v有興趣就解解看
$ [, u* Y8 ?2 C- ?* P不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:: ]% X) l' p, \  C# e) {7 @- [' A) K

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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:
1 h" p3 u. M6 \4 w4 H+ U捉錯處就唔敢當
* m5 L9 Z& ~" m# p不過,c=101n哥度(解...

( ~7 V3 I' |' L4 k) k) b: p4 B  i+ _; v% K5 e  _% I
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
, H! q0 }( g7 m/ e+ Y5 Z8 m6 b. _反而適當地調節一下 , 咁會理性好多
- M  _: V# X3 u/ ]就好似隻game 由12粒珠 加到13粒珠咁
+ F- X6 e# [1 J0 A3 f當''堂''好玩哂
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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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& Y% M7 a; Y" A+ L& g+ P! V( Lp.s. 求''堂''字正寫...

2 l' n) C% ]$ c8 C& w已是正寫吧