sakura310

Filename: DSC01158.JPG
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+ K0 j. v+ M. s1 M  ]' p$ Z2008-01-18 00:25:24 | 阿感 | 2: H5 g5 p% n6 q( A# ]5 r5 A: o
2008-01-18 00:24:20 | playbr2 | 2
+ S+ @% H& p7 H! t+ X2008-01-18 00:22:02 | 但丁 | 2
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點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
( F+ A- A) j- mFilename: DSC01158.JPG
4 \, r, G5 l1 ~  QDatetime | Downloaded by | Counts
. A. [) d3 p% F' t7 V9 ?2008-01-18 00:25:24 | 阿感 | 2
5 M0 b, y6 x- x0 Z1 x$ w6 s0 x3 H2008-01-18 00:24:20 | playbr2 | 2
  x1 r4 _+ |! B6 l0 p4 T2008-01-18 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' n; T2 c( \, x' k+ y8 U
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:9 y# b2 `0 U0 X% N# [( L7 e
Filename: DSC01158.JPG; y  k7 E# s% t/ ?' V+ ]
Datetime | Downloaded by | Counts
; r$ q" X6 T+ V* [& F, L; b+ J) Z2008-01-18 00:25:24 | 阿感 | 2
& A$ F5 V/ h% }/ `. L2 x6 W2008-01-18 00:24:20 | playbr2 | 2! ]  `- x4 F; f; c
2008-01-18 00:22:02 | 但丁 | 2
4 v; z/ }/ H( _% v% l  n3 Z; b- {1 n. B+ Y" J% V# ?
點解大家都down兩次? XD

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快d捉我錯處
+ b& _7 v; j1 u1 o4 W2 X  w話吾定我都打錯 + - 符號* H8 q' F' [9 i0 V3 L
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
9 o2 w) ?  [; k" H不過,c=101n哥度(解除n係正整數的限制,只是整數)
9 l) B' m: q8 [. J. Z( f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~)
* j& }& O* D+ t知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
" K4 Z9 ^4 x$ V  ~' y! n( ?2 n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0 D4 i) |8 z; \+ B0 ~
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
: ^1 a  P0 S1 O7 r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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2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
8 R/ k* r" S2 F  c0 T9 z冇答案ga....  q7 N$ i3 i; z* K6 a
2 D0 z! Q1 q) c( q
2條equation solve 唔到3個unknown ga....

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agree
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2 equations 2 unknows3 C6 S; }$ b  D" e/ m
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if 3 unknows there should be 3 equations 6 i0 e1 d, |6 I9 c. W$ i
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make it simple * b5 I* Z: J& j; Y! V( J, b
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say
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a + b +c = 32 C: X$ J: U. F2 U& C# `8 x0 D

; X" Q/ x. x( Ma+b = 2
6 b# j+ J7 A6 a0 F8 t/ U/ O5 \9 b
" f) @1 K& x8 E" F' R' q$ dthen c is 1
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) D; a; C  E# Ga = 2 - b
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so 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:- F+ j3 ^! A% P* U% U. u/ e
冇答案ga....' k4 N# e& C0 B  Q
1 E  g* V+ @% {# D
2條equation solve 唔到3個unknown ga....

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! \  v+ T" y3 `& |8 X此言差矣~" {1 D6 ~' f! ?
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2條equation solve 唔到3個unknown ga9 k/ i& F+ ?7 U# I; F: }
還欠一個條件,就是3條equation都是linear independent(線性無關)的) D4 ]; d% a% G3 Q, S1 L

: V5 L: q! c# C0 D* d; Z" _5 p簡單點說,多元一次方程就是線性方程的一個例子& J- d1 d0 ^2 r( C+ Q+ B
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; Y$ z- ]# }& b4 o, l

  {( _- ]$ O& |8 ^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~)
7 i( b8 ?! W$ D/ J, J% Z+ o) |! B* t例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解0 E5 Y" m7 W+ u! C$ f' S- a
有興趣就解解看* c! p) g1 w" o7 h4 e3 D
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:& u6 q0 U( q* g# y/ q0 F. q
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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:: B7 W" Q+ q& q% n/ k' q
捉錯處就唔敢當
6 E- K7 }+ ~; s' F' Q5 ]不過,c=101n哥度(解...

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& S/ t9 N5 g/ _( d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
+ \( r7 L, {* Z8 _' n* ]反而適當地調節一下 , 咁會理性好多  ]: Q9 a3 n* W. p
就好似隻game 由12粒珠 加到13粒珠咁  @8 ~" `# F( E+ H  U
當''堂''好玩哂
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5 ?1 o" l( V# [+ s! f( u8 A2 _4 V. ^p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:# Z3 w, v  d' P: T
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p.s. 求''堂''字正寫...

& m4 j( ^( g6 K# `$ m已是正寫吧