sakura310

Filename: DSC01158.JPG& @' ]5 K1 ?  _( [8 m/ B
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2008-01-18 00:25:24 | 阿感 | 2
6 p8 @6 z/ n* @* f4 S4 Z) c2008-01-18 00:24:20 | playbr2 | 2  c9 \) Q1 ~+ y8 l+ {
2008-01-18 00:22:02 | 但丁 | 2; S7 ?+ i# n/ T* ^

) Z) ?! ?! C9 s5 K" O/ n+ Z點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:0 C6 ], q! _3 a! x9 p6 [7 Q
Filename: DSC01158.JPG+ p2 s3 t( p1 B( M: J/ \. u8 K
Datetime | Downloaded by | Counts
8 X7 z' Q) Y. _" e$ T6 v2008-01-18 00:25:24 | 阿感 | 2
. i+ D. D( z4 D4 D1 o* a, J- Y% S2008-01-18 00:24:20 | playbr2 | 2
$ g. c# G. f8 x2 l% a2008-01-18 00:22:02 | 但丁 | 2
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* p, w) ]/ q% A2 t+ S, A3 g  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
5 }) [& ~1 u5 d, t  S; `之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
  I3 M! [* n. m' y% bFilename: DSC01158.JPG
3 {$ n5 C% a* `& _( J1 V: \Datetime | Downloaded by | Counts
3 |% L. ]  i' M- `5 |2 s# ~6 w) c2008-01-18 00:25:24 | 阿感 | 28 V: h' F. V: n2 f. M, {& l
2008-01-18 00:24:20 | playbr2 | 2
' q& U, c& S4 w  W2 W1 z/ c2008-01-18 00:22:02 | 但丁 | 2
: p; ]% ]" E8 q3 N) \7 C/ n4 Q+ m# C( j. @4 X% i& p
點解大家都down兩次? XD

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. c3 {+ }3 x* ]7 p快d捉我錯處
: Z: f0 @  E* y9 I  N2 H) P% }話吾定我都打錯 + - 符號
7 ^/ B2 f) O& N% ^0 S係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
" V. J9 ^& K5 L5 r; l- e7 ~$ m/ Y不過,c=101n哥度(解除n係正整數的限制,只是整數)9 G, m; |( H, P. Z+ `) L, 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~)
& G; C6 i, g3 Q/ F+ y知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
. L% E5 R9 J  O3 e但原先是不知答案,所以唔知有無失根- H) t1 |' f7 P& R" h( j& Z) H
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有時見到題目都感到有點不爽
  x0 `+ }( D7 R* _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, u" t. H! y* V2 r- t9 e# D6 ~
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....$ g  M4 U: S( x3 w; W+ o
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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:* f" a% `$ Z5 K: n% H' f' B, f/ n. F
冇答案ga....
  B; B; G  c$ ^. f! b: u6 {) V. Q' E  F
2條equation solve 唔到3個unknown ga....

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agree ! B2 b" H# w+ m! L( u

. [' y5 G5 E- [& c  u2 q4 z2 equations 2 unknows/ Q( C, p1 L  H( ?! ^
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if 3 unknows there should be 3 equations ! M+ @8 q, y" `: A: S) S5 ^) Q

% x0 T) [6 ^: ~2 v; x% R5 Qmake it simple
3 o6 o) ^& H; K' X" ]6 {$ z$ ^3 d( z
say 8 v  a* c1 M; e; P" x- j  o; b

- L  r2 ^% R) ]- B# E+ za + b +c = 3
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0 S7 E5 e3 K$ L# s$ Ta+b = 2
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then c is 1
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4 c% W( k# O* y: ]& q' ea = 2 - b - V) E; y! g; ~" ]0 b

" B$ x" `: x, k  Sso 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:- r7 @1 O2 Z& L
冇答案ga....
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9 l1 Q2 r1 q, O2條equation solve 唔到3個unknown ga....

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此言差矣~4 z4 w6 {9 r) C! D) M4 y+ }

3 z# b: @) ^( b1 W: J- l2條equation solve 唔到3個unknown ga! j5 ^# @; x2 k& c" Q/ [+ \0 j( F* _
還欠一個條件,就是3條equation都是linear independent(線性無關)的- b+ q  c2 h( k+ F: I; X$ u! z

; t# \4 g: \3 G; a$ x) H% k- U簡單點說,多元一次方程就是線性方程的一個例子4 D( n& a9 v% J# H- [. c
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~)
8 y( X/ l* o6 T# n) r) O例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解) h( R9 P% g! l# v5 S( B$ m
有興趣就解解看
$ F0 p9 [; y0 D' F  {& @4 E不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:( l2 A/ i5 X+ F% D

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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:
9 P& v; D) K+ f' C捉錯處就唔敢當
3 t7 l# \( P: G# h, |* r* G3 M+ C/ c不過,c=101n哥度(解...

5 E6 D, _) ]. V0 Q8 I+ \; Q0 i, J, X1 C- ~
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+ ^& m* E7 a$ L3 ], {! e0 |9 u- d
反而適當地調節一下 , 咁會理性好多: a9 W& E; N* y2 `/ o
就好似隻game 由12粒珠 加到13粒珠咁& v- j1 E- j2 D# E; E! z
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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, c9 g( T; N4 qp.s. 求''堂''字正寫...

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已是正寫吧