sakura310

Filename: DSC01158.JPG
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2008-01-18 00:25:24 | 阿感 | 2
* v  D, |& y) n9 a1 j* b0 C2008-01-18 00:24:20 | playbr2 | 29 K: d- @5 P: U7 n  a4 l" L. p
2008-01-18 00:22:02 | 但丁 | 2! f0 v2 L9 {  D
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點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:1 m4 o! `3 q$ P$ L% Y. e  b4 w9 W
Filename: DSC01158.JPG
9 s) C. O( L, ~7 k: X6 r; ^# {Datetime | Downloaded by | Counts) S7 D" Z+ x& F; o2 R0 J3 \( j
2008-01-18 00:25:24 | 阿感 | 2
- O7 i# F% {5 i% ]; s2008-01-18 00:24:20 | playbr2 | 25 ?1 ~3 v4 z( W' H# B+ V, W% F
2008-01-18 00:22:02 | 但丁 | 2
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; `7 g! W4 ~; V# l! G( p點解大家都down兩次? XD

8 M2 b2 P$ z" _8 W4 P# O; b/ @
/ d1 a$ v* h( {$ n/ z/ f1 u$ j我第一次開睇左2秒就close 左' H1 W+ d+ Z2 H5 h. [4 i) G3 }
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:, K8 M8 U. n) L! y6 R# o8 g6 r
Filename: DSC01158.JPG! @% B9 S- n6 Q* }5 ~2 h9 [
Datetime | Downloaded by | Counts. \2 f9 Q, J* _7 \9 k" A# D* Y. D& o
2008-01-18 00:25:24 | 阿感 | 2+ E) o) D8 Y: y
2008-01-18 00:24:20 | playbr2 | 2
% ?8 v1 I  K% _# k' V2008-01-18 00:22:02 | 但丁 | 2$ M% a3 B. ^3 `* t

+ A& P. H4 C8 O% Z點解大家都down兩次? XD

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$ c, i$ i4 M. U, H5 s* @. {快d捉我錯處0 g, @2 F$ B! Y1 z) y& @& u' T
話吾定我都打錯 + - 符號
8 r; c: W9 [. h+ Q( `係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
6 N3 k2 ?8 O5 b9 |1 }不過,c=101n哥度(解除n係正整數的限制,只是整數)8 ?" O( Y* b: s2 R
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~)
7 F2 w8 H8 c/ Z' h, f4 w* q0 M! |知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題/ {9 ^+ ]1 e- b, W3 j
但原先是不知答案,所以唔知有無失根  Y0 g  y* S3 N, m9 T% a3 D

2 X& s- O5 w% m+ d+ [$ Y有時見到題目都感到有點不爽
; N: G. n5 u* j8 i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
4 S* R3 l$ E5 [9 w8 o: g" e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....1 J3 \1 V9 ]9 M  c  x2 Y
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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:
6 K8 R2 p1 l7 @冇答案ga....
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8 M5 k3 [* Q+ }) e. {) Y2條equation solve 唔到3個unknown ga....

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) v+ R! ]6 o! g5 R. M- d( vagree
$ a, q& M5 o* u' m( c+ _* t6 X8 i% ~+ K6 Y: ]4 }
2 equations 2 unknows
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if 3 unknows there should be 3 equations
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make it simple 4 u+ y4 a5 I  q( B  N. a, [

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a + b +c = 3& W9 u- D, l3 R2 b' A; u
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a+b = 2
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* I, n8 k& C- Z. othen c is 1
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# s  \/ f+ h, Pa = 2 - b
3 f, x# @9 v! n3 D0 T' k$ Q5 L6 s  g$ B! A7 D" ~
so 0 = 0 ( r$ w5 c' K/ p

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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:* h0 m# X; @4 a+ r/ m& ^$ L. `
冇答案ga....
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2條equation solve 唔到3個unknown ga....

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! c3 F, e4 ]+ G/ o此言差矣~
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2條equation solve 唔到3個unknown ga! r; R6 y1 w# ~$ S2 c8 o) ~
還欠一個條件,就是3條equation都是linear independent(線性無關)的4 _7 K$ |% E5 O( Q4 v* p, w1 ?
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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1 z% S, U$ l3 T; `
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, I1 u' J, ~# \( n# N% w

0 ]0 G% t' T$ b* `3 }8 `+ Q' g+ I: E" H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~)
+ h2 T) @  l! d7 v例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
- [8 H( j1 i" X9 A7 G有興趣就解解看  O) Q3 @# h. ^- J! F* v4 Z1 [
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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) {. j  l: t" H4 c+ |* V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:
" Q" k4 n: j+ C( G3 _$ K捉錯處就唔敢當2 m& O- [# j- K7 U" D9 s  y' v
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 x- T8 i, L5 r: N
反而適當地調節一下 , 咁會理性好多$ ^7 C! ~+ Z+ b5 v
就好似隻game 由12粒珠 加到13粒珠咁$ c& y8 B. j6 H5 ^- N5 x% w+ r
當''堂''好玩哂9 ?" b# i! x; \  Q. O6 N

8 U& q9 }1 p" K8 Rp.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:! F, @: x8 g; z6 k% `( f- i& \

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. S" X8 \( ^# G" \4 H6 A, r  Fp.s. 求''堂''字正寫...

5 `+ m& _) |% A* H已是正寫吧