sakura310

Filename: DSC01158.JPG% B$ e. ]7 q3 s
Datetime | Downloaded by | Counts$ S; u7 v+ ^' T. G( V& u
2008-01-18 00:25:24 | 阿感 | 21 U2 ^1 L2 M: O2 n  {
2008-01-18 00:24:20 | playbr2 | 2
! l+ a, m' d& z' m" E2008-01-18 00:22:02 | 但丁 | 2# p; D, Q2 p9 R! G0 Z

/ X& M. n; g0 v3 ]( A. t# o點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:- b; p# y- T# j6 F- m- V
Filename: DSC01158.JPG( o2 C- D# _# F. m
Datetime | Downloaded by | Counts
  T. n4 c" h. }: ~1 _2008-01-18 00:25:24 | 阿感 | 2
+ {" \* R+ X1 X/ ]0 J2008-01-18 00:24:20 | playbr2 | 2
/ S" T5 B0 b) s4 E2008-01-18 00:22:02 | 但丁 | 2
7 ~/ v' q" n# R; m
- j, T, B/ j. z, k7 j點解大家都down兩次? XD

, ~: B/ B9 q. t) c( p& L' @1 [
1 k9 u* R0 _* @( \0 J
我第一次開睇左2秒就close 左
4 s. Z2 G& F, n" U之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
* f- w! K1 N5 k/ S& HFilename: DSC01158.JPG" o! @0 m7 V. ~* S4 U, ]9 H
Datetime | Downloaded by | Counts
* {  i* y- O! Y: Y' M! v7 {2008-01-18 00:25:24 | 阿感 | 2, |1 A/ w- S. X2 M5 Z8 Y
2008-01-18 00:24:20 | playbr2 | 2
8 n2 C. h6 p0 l% \8 d2008-01-18 00:22:02 | 但丁 | 2+ s$ L! ^4 E( H

* F- H+ R( s: }點解大家都down兩次? XD

! u( M3 t0 n, v, |/ w! a, I1 E0 l

- G( ^7 m9 j7 @4 _2 `9 K快d捉我錯處5 s8 v/ k/ W+ H& n! r3 x4 ^+ f/ z
話吾定我都打錯 + - 符號
$ u, j2 G$ f1 a" T2 ~3 H# h2 G/ B係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當& m9 J5 [& c$ x8 y1 \5 P4 f
不過,c=101n哥度(解除n係正整數的限制,只是整數)( J% h2 G* `+ d. J7 a
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~)
$ h, ^' u+ X. W1 v, P0 A知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
7 }- |* N6 e) N但原先是不知答案,所以唔知有無失根4 T* g" W' q. N
& W! D3 D& i! ]% s# }* b9 B; H3 H
有時見到題目都感到有點不爽
5 z% P) F' H7 `; _" m$ y5 V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
0 O8 ~. {' |0 [: g* m$ W- W1 k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....0 N$ e* G. E/ x  P- _# ^4 n
& w3 |; V9 k2 d9 A
2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
5 |! I! i& r6 `2 _" [冇答案ga....
1 y4 c! D0 S$ t: S+ Y# T4 e
0 j6 L. _5 ^) _, ^3 u7 ~. k2條equation solve 唔到3個unknown ga....

7 C2 i+ R3 c+ Y. ]8 ]7 r
0 W  U+ J1 S7 `
agree
5 y$ E5 O; a1 a* F. q( q* U4 N! L* |
2 equations 2 unknows
# K- Z, @0 x8 L' c9 ]
$ w6 m+ _" H) J! Gif 3 unknows there should be 3 equations ; F/ f$ n3 o4 v! U% x
$ }3 `( b9 S8 b7 E( u$ H
make it simple
& b+ T( X: O- ]6 m- U8 T  M$ O' }) Y
say % {2 F4 d7 ]9 W- D6 G

. F9 {8 H$ c! Ia + b +c = 3
: ]+ b) a2 ]: b+ @& l$ q* p( ~8 W$ T. L' \
a+b = 2- T  Y: W5 X2 `# i' M7 A4 j! g

/ c! {& J: c& ethen c is 1 4 C+ I8 W$ o& p

3 M2 v9 }; b8 y- na = 2 - b
' S+ N" c+ j6 M* W: i7 i/ U: V
0 f& b( q) B6 V) Qso 0 = 0 & L; o* h. N- Q$ }8 p
) b/ o. A, q7 N) K/ @% ]

sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
- }; A1 ^+ b4 U6 W/ z5 _' b; H冇答案ga....' c& }' Q. a$ o% [% B. [- }
5 u4 u9 W- p+ w
2條equation solve 唔到3個unknown ga....

) Z1 d- J, G5 L! V) V, }9 u  ?4 r/ v6 ?) [3 v6 j
此言差矣~
& l# i8 w* Z$ E( O, Q: {* c/ K9 D. c: W. ~8 i) l  a  d/ W
2條equation solve 唔到3個unknown ga
8 P! K& P& Z; s; M還欠一個條件,就是3條equation都是linear independent(線性無關)的
! c7 H1 f  W5 t( U! h- E; e- {' p8 p+ s
簡單點說,多元一次方程就是線性方程的一個例子
; l) s& S" h% }4 V$ @; O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
6 r( |4 @9 ]$ n+ N9 ]- T2 \
) \! P, M$ H6 P3 A# ^6 o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~)/ ]! k( d5 q( |* r+ t1 ^6 d0 V
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
% e  u8 l1 U; W3 F5 S$ E) [有興趣就解解看# E5 c: q* N( k5 r  w) u5 H
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:& Z& I4 K# s9 Q! e9 g6 y7 \

) y# o& f0 Z5 x' g% n1 t7 |# U3 S( l' p& a
不懂的話就問playplay,佢會知答案

+ J& E& [0 k7 R6 P+ u8 H1 Z+ S/ V2 u( D

playbr2

Originally posted by sakura310 at  06:47 AM:
! b$ T- ]; Z5 b$ K捉錯處就唔敢當
* _+ z& A; ]9 i' T1 E8 h不過,c=101n哥度(解...

6 A( G: G5 F* l# J8 b$ ?, R
; t; I! q, i7 S% ]4 m) _& X* A
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
2 V1 F: M" X! L  t+ c反而適當地調節一下 , 咁會理性好多6 _# o( ^& l) j1 `- O# {
就好似隻game 由12粒珠 加到13粒珠咁
) Z( E5 q8 g$ T當''堂''好玩哂7 V: V5 s" E% V7 h
  ^% p: v/ o0 U* H6 Z3 h
p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:: J6 H, t7 W% v' E( \0 Q

  ^% f$ f. B  V6 L" A; a$ Q/ ^  K8 R8 Y* v6 {+ d
p.s. 求''堂''字正寫...

% ~( y/ X0 {9 H9 X0 o5 |3 U' L
已是正寫吧