sakura310

Filename: DSC01158.JPG
, G; ^' V3 j3 D' m& u( o9 Z- b) RDatetime | Downloaded by | Counts' f% u" _4 Z& a: c  N" i7 I
2008-01-18 00:25:24 | 阿感 | 2$ |7 c' ^6 y! I9 X# T
2008-01-18 00:24:20 | playbr2 | 2; U5 q( C' c; O' N
2008-01-18 00:22:02 | 但丁 | 2
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4 K0 r. Z  l$ S. c$ E點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:  k, a6 U# @. k% c9 T- Q* P
Filename: DSC01158.JPG
# O: }+ g8 k1 S/ y( n$ c6 ?& _Datetime | Downloaded by | Counts
9 w3 _6 b; Y1 x0 h$ e1 i2008-01-18 00:25:24 | 阿感 | 26 z3 ]. b* j) w  S0 k% w. r  V" {
2008-01-18 00:24:20 | playbr2 | 2
$ O% l" K) @) A9 n2008-01-18 00:22:02 | 但丁 | 2! \: b6 N# U$ `% O  U7 x1 o' N* Y
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點解大家都down兩次? XD

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8 @/ j* a, v* }4 |+ T我第一次開睇左2秒就close 左! G0 s( B& l: @/ K7 i% ?, K
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
, D! m$ G8 x9 X5 R* ZFilename: DSC01158.JPG
4 j" ]4 V! b1 N% K6 S& qDatetime | Downloaded by | Counts2 A9 |; f5 j  A+ L4 f
2008-01-18 00:25:24 | 阿感 | 2
0 K$ A$ a% Q( ]  Y* o2008-01-18 00:24:20 | playbr2 | 2
  E; M* B* O% n0 O5 w( M" N! ~2008-01-18 00:22:02 | 但丁 | 27 P# M9 |* v+ O# F  e! \& S
6 x" |9 U6 d! R2 ~& N/ ?
點解大家都down兩次? XD

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快d捉我錯處! Y) g+ s' v" l
話吾定我都打錯 + - 符號' U& q4 S; C8 q
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
$ ^9 z; x. }( v% j) ~4 R( u0 ~不過,c=101n哥度(解除n係正整數的限制,只是整數)
; {. z; x: P$ k9 X6 N( y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~); O% O+ A" K: p) b$ q& ?/ G
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題2 @8 W  x. f: o" J
但原先是不知答案,所以唔知有無失根* }$ E/ o7 M4 b- z/ X, R

1 v1 j# ]4 @/ \4 Y+ P有時見到題目都感到有點不爽' e) ?2 ?: j0 g1 h
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# e& Z2 f% d& r; ~5 t
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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7 W* b% [) X) g: R) M5 f. E2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:: u3 Z9 b5 {3 x! i
冇答案ga....% Z1 n5 t- @/ x+ L* @

) m5 I4 D7 `+ x* N  N" ^2條equation solve 唔到3個unknown ga....

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2 equations 2 unknows1 V  H5 z* Z! _$ {& `1 _3 v+ O
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if 3 unknows there should be 3 equations
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make it simple $ H2 V& Q* [; ]4 u/ Y

- D( u( J5 G4 ~say . }( R# W: \: u  J6 |, V* \  J
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a + b +c = 3; g* |0 m# ?' ]8 [

8 y4 T+ D; C/ Ja+b = 2
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then c is 1
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a = 2 - b ; B! W/ X/ E2 N3 }5 Y4 s

6 P1 I! y+ a( L5 f' t6 O% t& Yso 0 = 0 . h8 _- X/ g7 j- X9 s3 I

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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:: e" f2 a3 v) c+ e7 j( i0 S
冇答案ga....
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& R% J1 p# L0 ~2 _8 X2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
4 y6 X$ n% O6 R) v還欠一個條件,就是3條equation都是linear independent(線性無關)的
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7 |( S5 @- S2 R+ [5 a# L& v簡單點說,多元一次方程就是線性方程的一個例子
2 b2 l+ M/ A1 X/ W1 I) W' H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  V9 K" N# ^( t; V: N

2 {- m: B, l4 M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~), v0 n! w. H! R! I4 p9 H8 a
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解+ Z% ~1 Q  P: }7 \. ~/ _5 W8 @
有興趣就解解看" D. G) f, V0 s* A
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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( u, }$ W" ?" M$ y) y8 ~3 p$ i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:8 `- \5 C4 |# m4 b8 e5 }  X
捉錯處就唔敢當
2 _0 |. H$ e% D* y$ P8 x不過,c=101n哥度(解...

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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
  ]  ]3 _, u4 v# r反而適當地調節一下 , 咁會理性好多" T! s8 I9 w5 p2 o
就好似隻game 由12粒珠 加到13粒珠咁
- q: K( }: s3 l當''堂''好玩哂3 _% P  D: b3 J# c; t  j3 m

) [6 ]6 C3 |: I3 ^. E; @( Cp.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
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p.s. 求''堂''字正寫...

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已是正寫吧