sakura310

Filename: DSC01158.JPG
2 {# X/ S. f4 S7 o0 v6 B8 T# W3 GDatetime | Downloaded by | Counts
+ f* c7 P, D; j6 S5 J7 b2008-01-18 00:25:24 | 阿感 | 2/ B+ u! p4 |' n! w! J4 l! ^. v
2008-01-18 00:24:20 | playbr2 | 2
5 c# ~/ R0 s+ F! K2008-01-18 00:22:02 | 但丁 | 28 a3 H4 A% F, x5 F) z
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點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:1 A2 ~/ w4 `! s. n" ]0 ]
Filename: DSC01158.JPG
( ?& \: _8 K( Z' ]9 j- P4 ~Datetime | Downloaded by | Counts
" y+ I# E* q) s8 A% ~% v2008-01-18 00:25:24 | 阿感 | 2
0 h6 H6 a0 w! a5 J2008-01-18 00:24:20 | playbr2 | 2
: h* w" E9 [4 t+ e, d$ t2008-01-18 00:22:02 | 但丁 | 2
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$ [2 f( N( C2 d/ H' b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8 V/ p; Q! p. N3 d/ W3 g
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
* k1 f  T0 v2 i& K4 a! Y. Z7 OFilename: DSC01158.JPG9 h% T3 T5 U# v/ v. U, ~# w
Datetime | Downloaded by | Counts4 |; y; \% [% ]4 v' q
2008-01-18 00:25:24 | 阿感 | 2
3 y% ?, `: m8 L7 _; O+ W; z* j% p  G2008-01-18 00:24:20 | playbr2 | 2
# ~3 O" i8 _5 s4 p/ c2008-01-18 00:22:02 | 但丁 | 2" x! \; J6 z2 F* D: ]4 J6 {6 H
3 d3 N* |3 C3 O7 b. y: F! q3 o
點解大家都down兩次? XD

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/ V, r/ j( B9 S+ k0 U8 m快d捉我錯處1 K9 x0 ?) Q' B  _: g: @$ Y7 V
話吾定我都打錯 + - 符號
1 X2 ]$ {- U7 i4 Z係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
9 l# A; s; f, E6 C5 {: o不過,c=101n哥度(解除n係正整數的限制,只是整數)
4 s0 l  w/ W$ B$ m$ S% O5 y7 n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, S" q3 ~( }" V知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題, b0 F6 h$ l' m% L4 |
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" L; F4 h& e& p1 p
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
7 Z4 a  k# s- F% [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:6 q3 E6 M- P: D1 x
冇答案ga....% i0 `8 q. z, F; m1 H
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2條equation solve 唔到3個unknown ga....

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agree
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9 W; R6 L; q: P" b. ]# g4 K" Z2 equations 2 unknows. u3 D. S& w0 D/ k& k* f4 [
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if 3 unknows there should be 3 equations
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make it simple
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say " i# s3 T2 K  M$ y* r

' o: e5 u% L4 Y# Ta + b +c = 3
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a+b = 2
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then c is 1
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3 p- b: o  k/ n. U: i) F  `/ pa = 2 - b
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+ I+ M8 U" q5 W$ Q7 F' t" Jso 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:  r) W6 a+ H. K" q2 W  k! Y
冇答案ga....
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$ q' P2 ^; m8 H. A; \/ E8 g4 W- V2條equation solve 唔到3個unknown ga....

' D- C6 n* q3 D8 i

) p6 E9 R( p: [: D: V+ X& a$ u此言差矣~
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5 S  M' s6 m5 Y  e2條equation solve 唔到3個unknown ga# _0 D. z0 [! n
還欠一個條件,就是3條equation都是linear independent(線性無關)的: {0 i' v. Z8 X8 q) j

6 z9 |$ U0 @1 e簡單點說,多元一次方程就是線性方程的一個例子
6 \- g$ }4 w1 J  d9 O$ m" j# d9 ]1 n( @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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) O$ d1 ~6 U, D% q) t* I8 P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~)( t, ^( E$ ]1 H" \/ ]- c0 `
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
7 z3 C; K5 |* U$ ~2 f5 z$ p有興趣就解解看, S5 c. K6 I0 v9 G* n' ?
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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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:
3 L; a' k' `- s捉錯處就唔敢當
: y* K, r' S( x) `0 ?0 u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
* U; S$ j! z7 ~# C3 y反而適當地調節一下 , 咁會理性好多
0 o; d  }: p2 L, \7 I' z就好似隻game 由12粒珠 加到13粒珠咁0 p" ?; Q7 |4 Z) g5 u) O
當''堂''好玩哂# M6 i# C9 M# r  u4 e3 ?/ C
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p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:# W/ x- y% ?' u5 `
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p.s. 求''堂''字正寫...

% P3 q& |& J" F+ B" |$ p已是正寫吧