sakura310

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2008-01-18 00:25:24 | 阿感 | 2! G1 I2 [# j$ g! j
2008-01-18 00:24:20 | playbr2 | 2
! ~* u: R" i8 y2008-01-18 00:22:02 | 但丁 | 2
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" O( x% i1 c+ x! g0 s3 I3 l點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
6 Y' I/ U) V3 K5 ]Filename: DSC01158.JPG" W' l( N6 A) D% g9 F' C
Datetime | Downloaded by | Counts3 G: c$ Y0 w$ i% _% J$ p6 T! F) w8 W
2008-01-18 00:25:24 | 阿感 | 2: r. v  B/ ~- U6 M# p
2008-01-18 00:24:20 | playbr2 | 2
* s! `" U4 E0 V. b! x' w2 [4 k2008-01-18 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
0 k$ v( p6 a% P  `7 q3 `之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
  [' {5 u$ z8 oFilename: DSC01158.JPG) e1 s+ T& t3 G' N$ q. U
Datetime | Downloaded by | Counts. w* s1 p, {1 Z5 j8 C" l6 J0 S
2008-01-18 00:25:24 | 阿感 | 2( V  m3 ]' e, @) ?
2008-01-18 00:24:20 | playbr2 | 2" d& A# {* Y( ^0 v
2008-01-18 00:22:02 | 但丁 | 22 Z5 L" A- q8 @6 a6 N3 V$ d) A

, F- ~( f- y+ f點解大家都down兩次? XD

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/ s; w" p3 t: i) P1 u: |快d捉我錯處2 r9 n7 ^9 C) e1 v, w! X8 Y
話吾定我都打錯 + - 符號
  U3 f" q0 [0 J( G- @係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當. _! b) m" w: p4 O& l3 o" ?
不過,c=101n哥度(解除n係正整數的限制,只是整數)5 \$ E9 ?9 Z3 M) S5 {: l
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~). b0 k2 ^: x1 _3 K
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
- L# r2 j7 \1 Y: p" O但原先是不知答案,所以唔知有無失根* G0 N7 J2 }/ V
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有時見到題目都感到有點不爽; H& \0 {" k. |: _) I5 C8 t
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, t% |" ?' g# f: `6 U; O- M9 H9 o
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:& N0 g8 W. W6 E& Q5 \% ~0 d9 T% x
冇答案ga..... A. |& i6 H  ^9 q! }
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2條equation solve 唔到3個unknown ga....

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agree ' a. j4 s( t# u: e! |# C

& \8 K) s$ H* S7 D' g! G2 equations 2 unknows
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# |- Y3 s1 U* ?# ~, b  Pif 3 unknows there should be 3 equations
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6 O7 T) k  {1 p4 v- Zmake it simple
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say # x+ d' U8 O& ^; t0 ^1 h3 K
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a + b +c = 3; _3 h/ U8 D5 S" s

2 K5 B3 V: i1 [a+b = 27 _/ ~: |5 K3 @

) x4 R9 _; U0 X6 g2 [then c is 1 7 G4 i6 F, W8 N6 p3 A7 z

4 ^/ q& F3 ?: @  `) j, ba = 2 - b
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3 J4 l  s( M# jso 0 = 0   b$ W0 T3 k( G3 J' a4 l8 W

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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:5 j' J8 s' O% Q# |6 k
冇答案ga....8 g9 B7 o  b" e) h/ U. `
! \; m7 z6 o4 x
2條equation solve 唔到3個unknown ga....

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7 B+ N8 p/ g0 ?. l5 J, y8 E此言差矣~# l( e, b# r7 B5 Q4 F4 _

* e1 ?* k! _/ |2條equation solve 唔到3個unknown ga- P, x' ]: S  F% G1 n) x, s
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, d( x# k5 i; l: _# 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  J7 b% t# k/ a4 d9 N- t% c$ C

$ ?* |/ ?) i/ A! C' Z$ c* o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~)
8 T) P: s( U' M- \/ ^例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解5 T: s! ?3 ~8 c
有興趣就解解看
1 g% S$ ~4 R# p" ^% F& x4 q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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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:
& ]& y/ H( e" O% e捉錯處就唔敢當7 Y9 R* g  N6 I" B/ g/ r
不過,c=101n哥度(解...

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* b" I3 l: M8 g5 y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
0 g& Y# }% `2 `4 Y4 y3 K- l( q. s& i3 L反而適當地調節一下 , 咁會理性好多$ v9 s7 D* d: |  b/ Q; A
就好似隻game 由12粒珠 加到13粒珠咁- p, K+ e' N( E. j. {$ G4 T
當''堂''好玩哂8 n* u; N2 e5 N  P

+ l+ [, R5 W" A0 g- op.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:; t2 q7 H6 f( c! h/ u
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p.s. 求''堂''字正寫...

& M( P6 J; F. c: q已是正寫吧