sakura310

Filename: DSC01158.JPG1 |6 _/ T9 b1 z! z
Datetime | Downloaded by | Counts
& a0 D! _4 r* j6 E2008-01-18 00:25:24 | 阿感 | 2/ v; X  B5 q, F) R5 L
2008-01-18 00:24:20 | playbr2 | 24 A1 I7 @$ _% V7 F6 Q3 g
2008-01-18 00:22:02 | 但丁 | 2+ F/ G; C" t8 I8 I& y
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點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
8 v; h2 n4 Q0 V$ ^) kFilename: DSC01158.JPG2 K( W5 x' Y8 {) |: K5 x5 N3 V
Datetime | Downloaded by | Counts, @$ x8 C$ l: U3 d3 y
2008-01-18 00:25:24 | 阿感 | 2/ L  j$ c3 b) Q$ t
2008-01-18 00:24:20 | playbr2 | 2
6 i2 ^, g7 [% C+ S: P2008-01-18 00:22:02 | 但丁 | 2
4 S) H/ G& u) v: A0 t2 w. W4 b$ D% K/ c
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
# r, D3 \0 {% T! h  e之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:( o2 F! p: M% x# T* u7 |# Y
Filename: DSC01158.JPG
* O- ^) Y. n# n; Y$ VDatetime | Downloaded by | Counts
2 ^, E% E$ L/ l% d' M0 e3 F2008-01-18 00:25:24 | 阿感 | 2
5 M- K( W) `0 Z& a2008-01-18 00:24:20 | playbr2 | 20 {% M* I9 N' R/ ]  o2 t
2008-01-18 00:22:02 | 但丁 | 2, v8 p. j) h: d( E
0 `$ W4 g1 x3 ]8 X4 B2 B0 p
點解大家都down兩次? XD

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快d捉我錯處/ ?- n3 q8 g% T0 `$ _
話吾定我都打錯 + - 符號1 I, Z+ E  }- Q$ F
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
7 i/ F) G2 Z9 V不過,c=101n哥度(解除n係正整數的限制,只是整數): k* x4 C- d' O4 J4 ?5 R
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 h/ }" I) E3 n- H& i知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
0 J( u7 i% S7 A但原先是不知答案,所以唔知有無失根7 W& U0 B  C4 Q$ }. {
8 S0 p) t4 z0 d3 j4 a8 X8 {  c
有時見到題目都感到有點不爽3 I9 g6 f4 j% w4 e. P' m
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
! d3 u, U8 a3 o) V$ I; h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....7 L8 h% I  b! `

- Z" e9 f4 I5 Q8 F5 w% g2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
! u1 k2 x7 E  o  u冇答案ga....
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: p9 s; v2 J% U3 J7 a5 A# X" s2 g- v2條equation solve 唔到3個unknown ga....

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agree * O) O; Z5 b3 B2 U' _$ E4 H
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2 equations 2 unknows0 o2 L1 o7 o! w1 r% u! h; t

* f7 G( N8 j9 E4 Y. Iif 3 unknows there should be 3 equations
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make it simple % C" [( S$ _" n/ y, s" _

' X- c& C6 _8 i9 z. msay
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4 {$ e/ w/ K; U) K2 R4 Xa + b +c = 3
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a+b = 2
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; }. x9 v1 _) ^* H' n$ ythen c is 1 2 R# ?6 v7 B+ [/ N

8 v6 r4 f( T0 \7 e5 ]) {7 b5 {a = 2 - b . H5 H; h# a& J9 F- W+ A  I
+ y- o1 Q4 v( H( |4 H& P0 d
so 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:+ D3 r% I7 e0 [& s* A- @
冇答案ga....8 Z! U4 A: b, `$ b" o
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2條equation solve 唔到3個unknown ga....

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5 l/ L; O: s7 R  ^$ j3 p此言差矣~5 ~. G5 u6 F3 {6 _: t
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2條equation solve 唔到3個unknown ga
  U$ ~" h% K; a還欠一個條件,就是3條equation都是linear independent(線性無關)的$ D9 h5 T- l2 a

  }) @, O# K6 K" J  G& ?" q簡單點說,多元一次方程就是線性方程的一個例子
5 W% \9 L- e/ d3 L% O, {" v- A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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( y% m( v. x: _) w3 |: J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~)/ Z. Q2 Q+ t: N
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
0 c  _) y& G: _/ g) N0 q" W" |+ m有興趣就解解看- B) _% c* v* G
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:5 a- }9 [4 k5 N/ G; u% O# h" g

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. d$ Q" ~. _* c# @" B$ @0 U' r: `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:' l  P5 N. w! |0 V
捉錯處就唔敢當
5 C* s) `3 _6 m: g不過,c=101n哥度(解...

6 L. t( w7 B. @

# d$ \# V/ m  v2 P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
, R( ]4 P7 @" d4 v( E* d反而適當地調節一下 , 咁會理性好多, w5 w- O7 x+ \* [: Q
就好似隻game 由12粒珠 加到13粒珠咁* Q2 i8 Q4 i9 q% O
當''堂''好玩哂
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7 J- E' p" c5 r; K, R! }5 M" mp.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
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7 O% D( s+ H/ u# k1 R! pp.s. 求''堂''字正寫...

  f" n1 }: d2 \) K3 d已是正寫吧