sakura310

Filename: DSC01158.JPG" L( T/ `0 f& D. x9 q! B3 m9 E- H
Datetime | Downloaded by | Counts: H' O3 |7 b9 B
2008-01-18 00:25:24 | 阿感 | 2
3 u# f7 ?1 a/ }$ M+ v3 H2008-01-18 00:24:20 | playbr2 | 2' O" S$ G: z7 z. ]+ o9 e! T
2008-01-18 00:22:02 | 但丁 | 20 H) g) V8 }1 {$ J2 M  ^

* h) I6 r% h2 S3 R  g0 }# ^9 _( z點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
( o1 a! k5 {, s9 zFilename: DSC01158.JPG+ T  L( z2 J4 X4 p& F7 W
Datetime | Downloaded by | Counts1 c" L0 d4 t! d7 ~
2008-01-18 00:25:24 | 阿感 | 2
) m" E. d+ p- A: _" p6 q- c2008-01-18 00:24:20 | playbr2 | 28 N8 w  j# U3 e4 z3 u/ O4 v  I
2008-01-18 00:22:02 | 但丁 | 22 C1 D, x% T! D5 |

2 X4 H$ y( q: g) a# [' J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
  m4 P4 D# d" A. V5 a  R- R' Y1 E" m之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:6 D6 f' r/ r4 q& x1 _- J5 a
Filename: DSC01158.JPG
) F: f9 U- q& o/ y$ x: G3 HDatetime | Downloaded by | Counts
& T) F- y  M% G2 l! O. K2008-01-18 00:25:24 | 阿感 | 2  T" @# a% K0 b$ g5 Q" j$ y' p) O
2008-01-18 00:24:20 | playbr2 | 2
8 p+ Y4 m% E( w8 O) j6 a8 L2008-01-18 00:22:02 | 但丁 | 2
5 p" c$ x$ g+ t0 z
6 u2 Y2 [2 w! T點解大家都down兩次? XD

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快d捉我錯處
7 ^% v; b6 T7 W2 A% ~( R3 X; n話吾定我都打錯 + - 符號/ d2 o- v1 d& f' {5 l
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
) d! F  g% t! s不過,c=101n哥度(解除n係正整數的限制,只是整數)3 I; @2 a% R5 _; u" Z) I! f: @3 e
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~)5 X5 Q" @, ]' a9 n2 H" u
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題4 r4 Q' x+ R2 H  l4 ~
但原先是不知答案,所以唔知有無失根
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; J) @9 o' ?% t. i+ i: A有時見到題目都感到有點不爽
6 |; {2 j$ O% {  f0 J6 W+ r4 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5 u. V/ @" _- p7 R" v9 Z* [
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...." H2 I3 [; C) L" A1 t/ d

) k4 M  c% b4 Y2 H2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:$ }* ~, l- U% N, p2 m
冇答案ga....  f$ [; `; a; E  V7 D
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2條equation solve 唔到3個unknown ga....

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4 T- _+ {) W( f& C8 F, kagree
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2 equations 2 unknows
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if 3 unknows there should be 3 equations 1 S2 l; p* _" p$ A% }8 W0 n9 J: S& y
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make it simple
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) q: r' O2 k6 X8 g/ r% C5 wsay
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a + b +c = 3
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a+b = 2
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then c is 1 + Z" s; ]) B  `8 C1 U4 h

, R) C4 H& K5 ja = 2 - b & I' c: H  A1 C7 P+ }- g

# j! B2 I( x5 g+ uso 0 = 0 8 w. ?9 N# d' `1 W+ q, j. b  C; f
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
2 g, P0 ^0 |& Y+ w冇答案ga...." l3 y+ s9 X8 n% c& E" B

& `$ b3 s% Q8 z' m2條equation solve 唔到3個unknown ga....

4 ?1 S5 L# j( F* o0 I

7 {1 Z- Y+ O, t& y& a此言差矣~
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2條equation solve 唔到3個unknown ga7 X* ~/ T1 B9 K2 T
還欠一個條件,就是3條equation都是linear independent(線性無關)的
0 b3 z+ b1 y: p4 x: `
$ @+ W# o4 U% N( v簡單點說,多元一次方程就是線性方程的一個例子
: J$ I0 D5 K& }, h6 i' c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~)
; J( D% Y  v5 |5 S% \$ T例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
4 E, z2 i9 V( Q有興趣就解解看, C, [2 S* N! k: S4 R5 U  Q( T
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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+ r1 |8 X1 H: 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:$ \2 ]# c( h" p* Q9 {
捉錯處就唔敢當
% y" z! h/ L' U$ U8 \不過,c=101n哥度(解...

1 O8 i5 t2 e0 k/ S- U5 Q( [8 Z0 T3 N( z$ k- E3 U( x
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# d1 @8 p! S) t% D* q反而適當地調節一下 , 咁會理性好多6 d9 L& R3 e9 D+ j9 i
就好似隻game 由12粒珠 加到13粒珠咁
9 B; ^8 g/ f& m) v8 p當''堂''好玩哂6 \  m$ }( k. Q7 g0 \

: N( S9 ?6 ]( B% o  H7 Ip.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
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8 D5 \# b) q+ \  C* P$ Ip.s. 求''堂''字正寫...

. r4 r1 ~; a: e$ N4 W) o已是正寫吧