sakura310

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2008-01-18 00:25:24 | 阿感 | 26 B5 l6 W9 ]+ w+ M- A0 h8 L
2008-01-18 00:24:20 | playbr2 | 2
$ P" a: W+ G% y  `$ A, \2008-01-18 00:22:02 | 但丁 | 2
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/ ^4 W4 W5 b5 a+ B2 N點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:4 a) ~2 E  L# r
Filename: DSC01158.JPG
1 e9 N  c9 o' N! ]6 }, N7 oDatetime | Downloaded by | Counts- u& K3 ~2 u% a5 K2 @
2008-01-18 00:25:24 | 阿感 | 2
) n0 h; |5 W) m6 l6 k" \- y2008-01-18 00:24:20 | playbr2 | 2: n# W3 S/ n- ]! f* n  t7 K" u' P
2008-01-18 00:22:02 | 但丁 | 25 N% H6 h/ I8 Q* t

" n& P& D1 B# a7 y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3 k( i- T3 o% Z, Y4 w' c$ c4 b
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
8 q/ t3 z' g7 p7 |3 S0 xFilename: DSC01158.JPG& \7 A! @8 q) j, J; V
Datetime | Downloaded by | Counts
' t, r5 A+ P& I6 V2008-01-18 00:25:24 | 阿感 | 2
1 O7 |+ a0 i& I5 E% b( m: e2008-01-18 00:24:20 | playbr2 | 2( Q% [" s2 p4 N' ^( p8 w
2008-01-18 00:22:02 | 但丁 | 2
: Z6 R3 D$ b4 a  G6 Q" B- H: W; p5 t! B) c, I4 H: T* F
點解大家都down兩次? XD

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0 T0 D4 o# u. ?3 Z1 Y/ Y: x% Y快d捉我錯處4 _! Q6 g3 I. A$ Q, I
話吾定我都打錯 + - 符號
( s% p4 g/ f/ o, _' M( l! B係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
6 b. V9 H8 z( i# q不過,c=101n哥度(解除n係正整數的限制,只是整數)
7 n6 }5 Q" ^  t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~)
* C( A- n& B) C) r% D( {) C. ^知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題& |6 P5 P: I* V: q" b9 O& b! F
但原先是不知答案,所以唔知有無失根5 N2 H8 d# ?& ~7 j: q2 U

8 l$ |% x- s  K$ z& C. t有時見到題目都感到有點不爽4 ?) n6 ~  b  t! o
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# H+ r$ ~' L( x. p2 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....
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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:) S( Z4 g: Y9 n7 ]; _7 w9 \- _
冇答案ga....# [. z& p' j; I% C. r4 |
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2條equation solve 唔到3個unknown ga....

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agree ' Q" c/ [9 s" ~; Q
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2 equations 2 unknows
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% }; S% F4 s& t7 L' d" cif 3 unknows there should be 3 equations
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/ e# L4 c- A* |: [2 X0 t- Q% G! }make it simple
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* E  Y" T' u5 f3 L( B4 L8 |say
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a + b +c = 3; f# \" c6 _# R; K1 b  `

1 H, z# A2 H2 m$ h9 Fa+b = 29 r  t& `8 x4 K& C

! L0 g1 X4 W4 T$ c! ^* ^then c is 1 ' E+ Z" Y' ~2 u& u+ C
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a = 2 - b 2 g/ x/ O1 e5 d. t7 J3 z# r
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so 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
4 ^! L. U0 [. t4 s7 X# s冇答案ga....
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8 i' ]- h4 F/ z2條equation solve 唔到3個unknown ga....

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3 K" l8 ^' G% X9 c+ d+ h7 w此言差矣~
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. r, X" e5 _. H, L3 t# w2條equation solve 唔到3個unknown ga/ [$ ~9 Z& M( D( ?3 [0 k
還欠一個條件,就是3條equation都是linear independent(線性無關)的1 E8 F; j) ]# j4 |! X  ~* Q6 r1 L

, F  v) ^, c' B. h& Y6 ^簡單點說,多元一次方程就是線性方程的一個例子6 u$ j1 _+ w; f' Q; }
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. E- e3 u( ~. w

6 _8 v! ^; e/ S# w* 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~)
0 \; s1 {' u" v2 H: a* E例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解& }4 h& F0 ^  E/ t1 A8 w
有興趣就解解看3 \% s$ h* ?  P: k; B% X
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:: q! L7 s; x& A( O
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1 h+ T( P% d. x5 \4 R; 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:% s4 {) \* O0 [3 a* M
捉錯處就唔敢當
' I5 C9 p- g! b! `7 Q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' c$ V/ I0 _' h! f9 A- W! v
反而適當地調節一下 , 咁會理性好多% O8 M# `, ]: l1 p
就好似隻game 由12粒珠 加到13粒珠咁( {: `7 k# |% h* o
當''堂''好玩哂
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. e: p9 Q; x$ f: S8 ^p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:+ Y# i7 A  N  S- O& B- s7 n

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p.s. 求''堂''字正寫...

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已是正寫吧