sakura310

Filename: DSC01158.JPG0 |! k5 \( ^  e
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2008-01-18 00:25:24 | 阿感 | 2) p, e2 t) I  q4 ^" `6 i
2008-01-18 00:24:20 | playbr2 | 26 ^1 T( h2 k8 M) X
2008-01-18 00:22:02 | 但丁 | 2
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- c* ?; X6 }9 M* V3 b; k0 g  w4 F8 p點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:+ I; V; e6 N. U/ B7 q
Filename: DSC01158.JPG( F" T- {7 ~# u2 H. q
Datetime | Downloaded by | Counts6 t* ]5 v4 A7 _! Z4 f
2008-01-18 00:25:24 | 阿感 | 20 O. O: ]- e( {; ]4 ^
2008-01-18 00:24:20 | playbr2 | 2
* V& |2 P; X/ Q, {0 r/ \2008-01-18 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
9 k2 l2 P3 K, d* b/ f8 f之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
5 O) L% l" W" [- L2 `Filename: DSC01158.JPG: I' ^- A* g( R& H) p
Datetime | Downloaded by | Counts
# [9 L$ y/ J- [6 w& X2008-01-18 00:25:24 | 阿感 | 2
( j- a/ k) {8 f1 E- u2008-01-18 00:24:20 | playbr2 | 2/ X3 J  X! {. k
2008-01-18 00:22:02 | 但丁 | 2
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/ |9 ^+ z  ~, W& j. l點解大家都down兩次? XD

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( E! y$ B: k3 \* X1 y7 ^9 o/ x- p5 z快d捉我錯處
* V- q$ c6 {% @% z; x/ s% P話吾定我都打錯 + - 符號
$ m$ v& G7 X1 A+ b9 Q1 C! s係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當1 P1 O2 j- L8 U! y; m. E, {5 a
不過,c=101n哥度(解除n係正整數的限制,只是整數)
9 Y$ H. Z' O& U  h& Q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~)
$ @# y, }: }, m$ T+ T8 C; E知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
' L2 j5 ?! ], c" Z0 [) H但原先是不知答案,所以唔知有無失根
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! d- P- t7 ~8 \* p5 y- _有時見到題目都感到有點不爽. C; K9 Q+ ?7 M9 d
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* ^2 i) X0 b9 P, X" P/ v, Q: d
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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" A3 Z, w/ O! K  m* X: b2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
; D7 P+ c, g3 Q2 R4 \冇答案ga....' x+ W$ H* n- [- F  H! h% d7 C) b2 I+ [
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2條equation solve 唔到3個unknown ga....

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5 f2 T1 F$ c. s' \% j1 n9 Lagree
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9 L) d8 q% b& H- l) k2 equations 2 unknows8 |  c" a# v( n
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if 3 unknows there should be 3 equations
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. e5 g2 o# b7 X" E6 S( z8 L3 wmake it simple
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a + b +c = 3
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a+b = 2& Q8 p5 S. C, Y. {$ C) F  E: p

! K" {3 h- v7 Q/ ]3 vthen c is 1
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$ _0 W# ^8 g+ @9 c, D0 ]a = 2 - b
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0 g  V% [6 d" q/ x- }3 i! `, Xso 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
  p, J: h+ E% r; c6 M4 K- e7 \冇答案ga....
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1 A$ q& w) d$ x3 I% g3 |; }2條equation solve 唔到3個unknown ga....

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此言差矣~" f0 t1 I8 i( J5 X: q+ q+ R

4 h% M; O8 k  Q' p2條equation solve 唔到3個unknown ga+ J* i1 P0 M4 Y5 B7 ?) C
還欠一個條件,就是3條equation都是linear independent(線性無關)的4 y" q' M  w; w& r4 P! M% x7 f

6 P6 {- Z4 Y3 v! I0 f' i" ~: j& B簡單點說,多元一次方程就是線性方程的一個例子' j5 w; x& w* q% l+ k
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~)" F$ |+ L& {+ x) U0 O4 k
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解! z! D- C$ W' k" L
有興趣就解解看; K  e+ x3 \  b5 k' h7 V
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:5 ~, h% N* e, m# ^; U/ T! @+ `6 E* Q( y" W

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  I) V) B7 k% |0 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:; [+ D& k( g/ z+ I
捉錯處就唔敢當
! B" k9 o7 [& k6 a' |3 i不過,c=101n哥度(解...

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( [) N! E1 e8 H5 f2 Z4 x$ k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
' `2 Y- o1 I& e反而適當地調節一下 , 咁會理性好多/ i; v7 |! R6 e/ a
就好似隻game 由12粒珠 加到13粒珠咁) v% |$ y" O! Q* h- x
當''堂''好玩哂0 o2 N3 Z( l7 ~$ j
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p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:+ E) o; i, h' y/ `

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, G( f2 r0 \$ k+ Bp.s. 求''堂''字正寫...

9 z9 Y) L* k3 u+ O* u1 |2 u已是正寫吧