sakura310

Filename: DSC01158.JPG
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2008-01-18 00:25:24 | 阿感 | 28 I8 Y! G% \, q6 r- a9 {- ?
2008-01-18 00:24:20 | playbr2 | 2
  `* ?4 ~- p  [. I7 P8 _, w) Q2 j, C2008-01-18 00:22:02 | 但丁 | 2
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5 w" a7 E0 A$ u! P2 {點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:. F8 f$ T. _) y: [
Filename: DSC01158.JPG" z: ^0 n2 d+ j$ k9 U9 l7 ^7 o
Datetime | Downloaded by | Counts
' J8 ^8 B' h! C; _5 R2008-01-18 00:25:24 | 阿感 | 29 [9 C# L1 c& M7 B
2008-01-18 00:24:20 | playbr2 | 2
6 Z$ w- e" Z4 ?; f8 A# f2008-01-18 00:22:02 | 但丁 | 2
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9 Q5 Z) i; E$ z! d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
+ J4 @, u) o. j4 \( p之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
- o& H' W2 w$ A  nFilename: DSC01158.JPG
0 y1 p( F: l0 O, [" t! wDatetime | Downloaded by | Counts/ `( m0 x1 T+ |, c; \& O
2008-01-18 00:25:24 | 阿感 | 2! E2 j- x# b. s* F/ i6 e
2008-01-18 00:24:20 | playbr2 | 2/ k1 p1 S! L4 X4 x& ?7 q1 j
2008-01-18 00:22:02 | 但丁 | 2
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# h: F4 U8 G$ s) S3 H  Y8 I點解大家都down兩次? XD

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快d捉我錯處
; N4 a$ z3 W, U0 K# T; y0 ?話吾定我都打錯 + - 符號  y6 P# o$ Y5 z; m2 X5 h9 M4 P; M" V
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
+ g8 F) y/ W% _3 ?4 ^% V6 [不過,c=101n哥度(解除n係正整數的限制,只是整數): e) c. C) y) o3 b
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~)
. D& X9 O- i8 V1 }9 Q" r知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題) h: `3 B) F3 }  L3 l3 W$ L
但原先是不知答案,所以唔知有無失根
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有時見到題目都感到有點不爽5 v6 C- H# Q$ j
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
3 ?# z7 B+ U. c& i; `0 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....* [+ e4 C0 M' V" j

9 I2 o1 n* b; E1 q2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:' L& b7 r" p5 m' Z
冇答案ga....3 @2 M- m) Y; X, g  [! m' ]

; l" j: _% d( _$ M, z% s2條equation solve 唔到3個unknown ga....

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agree . {$ z% n# U$ @  A  P

1 W% j( S# X1 S* y) g% k: Z2 @2 equations 2 unknows& J/ f# T" x1 h3 a5 q/ S- d
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if 3 unknows there should be 3 equations 8 e4 B2 Y) Z% }

9 k% K0 i& @2 imake it simple % i. R8 }3 r5 O7 d
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say
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2 c5 s& l, P# m0 T% q6 W, fa + b +c = 3
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1 [+ V, C4 M& X, t! Ja+b = 2
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then c is 1
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3 l; ]- X+ f/ i# ja = 2 - b
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2 a3 A7 `2 S6 N4 l9 `& }" M+ wso 0 = 0 " o7 b3 Z0 ?2 r: \% q5 t8 ?3 c

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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:/ g& e, e4 k0 Y4 R
冇答案ga....
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. D1 ^0 z8 K; k( a" F$ C2條equation solve 唔到3個unknown ga....

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此言差矣~
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2條equation solve 唔到3個unknown ga
# R6 ?& l/ r. _" G6 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( y! r" ?" ]* E) q  d# ]* z: D; Z
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~)) K" p4 _. o; z
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
8 F! n1 h; m4 @有興趣就解解看% \, e! S+ U* e$ a' L' Z+ H3 U
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:0 m9 a& i# J8 u+ v

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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:' o  F5 i5 x* x/ n3 a$ l
捉錯處就唔敢當6 i# }  D8 ?! B; z
不過,c=101n哥度(解...

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) K' |5 W5 l( Y: t/ n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: |) J4 f0 d' f+ \& M
反而適當地調節一下 , 咁會理性好多2 W" O6 Q( ~# S# G  }
就好似隻game 由12粒珠 加到13粒珠咁4 n/ L1 i7 U$ M
當''堂''好玩哂1 Y! K; \* o& U! E( ?' b  @. c* `
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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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! H7 C# Q* t1 X) A! Mp.s. 求''堂''字正寫...

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已是正寫吧