sakura310

Filename: DSC01158.JPG
' i% r; {4 H" ?* o4 q! ~$ ODatetime | Downloaded by | Counts
; s6 V' {4 p6 I1 ]$ i: x) d% p( `2008-01-18 00:25:24 | 阿感 | 2$ M, S7 B5 s2 e' B6 n
2008-01-18 00:24:20 | playbr2 | 2
5 \/ t- J. T4 L: Z# D2008-01-18 00:22:02 | 但丁 | 28 P! [2 W& K& T' d' a
9 F) x* O6 M7 x" G, C/ f
點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:( d8 P9 ~" X# J! x: m
Filename: DSC01158.JPG8 \) N( @4 R6 N- N/ D
Datetime | Downloaded by | Counts
% q3 M7 J9 W/ A; U: H2008-01-18 00:25:24 | 阿感 | 2
2 ]& u( U" Z6 T$ ?. Z+ j  N2008-01-18 00:24:20 | playbr2 | 2
! ]( S6 h! D' s  v% }- ]2008-01-18 00:22:02 | 但丁 | 2, F  y# d4 _# z

( f6 Y% T& {2 x7 j5 ^點解大家都down兩次? XD

, r& @2 q4 q6 L* p2 i
% |9 r& U* E; F  h1 a9 j3 c
我第一次開睇左2秒就close 左% K" y# m6 ^; L8 X( X# l' e8 O5 n
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
& S2 Q2 K+ r9 M; j3 @: hFilename: DSC01158.JPG
1 n5 w2 H3 ?3 @$ ADatetime | Downloaded by | Counts4 H$ g7 b4 o& `9 T/ x; Z  u. L9 F
2008-01-18 00:25:24 | 阿感 | 2+ s& o: Q& p  u$ a0 e4 q$ t
2008-01-18 00:24:20 | playbr2 | 2
( Y- h" O& B) J7 e+ r1 P5 ~  Q2008-01-18 00:22:02 | 但丁 | 2
/ q4 L/ p  |. c. D  s
: O7 U. w) f( z- X& l點解大家都down兩次? XD

! j- S2 g" m1 Z" P- ?! R7 A* _# ~
3 z" t5 [7 c  Q$ Z
快d捉我錯處. _. I% K5 Y/ e
話吾定我都打錯 + - 符號2 v3 e( @% u8 ?0 t: W' K, u
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當5 \; m5 p4 I; m% e$ [
不過,c=101n哥度(解除n係正整數的限制,只是整數)
2 J8 q( p; D* {/ v/ k/ `1 |7 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~)
0 G# k" E( L' C: [/ Z知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題. ]4 X% \9 @7 {+ n9 e1 n, g
但原先是不知答案,所以唔知有無失根
, [+ ^( ^. l# ?5 \0 w/ {! G; j. K# r# k3 U
有時見到題目都感到有點不爽
! c4 [, K7 @# j9 Y+ 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# Y7 C! `/ {, 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....: ^* I8 D5 Q( H2 a  i6 K) |. J' ]

( J+ ~0 P  q" ^6 Q- W3 [; \2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
8 }( u0 O3 N& g8 R6 v冇答案ga....7 O  B' Z' ^" Z. }3 ]

* S1 d- u% M) o1 C2條equation solve 唔到3個unknown ga....

  [' n. n* `6 m$ Y" t+ _7 T* \9 m0 o: H9 s, }) F7 K
agree 8 R4 B$ e8 k! s* f2 r

( `8 G3 G! v* v6 Q$ K, ]2 equations 2 unknows
/ ?, T5 n% L' H/ _& J6 b5 ^* b9 h; p# C% n. f" Q# s5 l, I
if 3 unknows there should be 3 equations , v  N, i7 V- P: Z' A! j
4 Z4 j& X% ~; T) i9 N, G! z8 g$ ]- I
make it simple
7 d2 T# o, F& _9 L* H' A+ I/ I& L$ ]; z* S+ h' Q! c8 H! R7 j
say ' K. H5 K5 N) w1 y
7 T+ b5 p/ V0 K: k$ K( m7 m
a + b +c = 3
6 w' S' P! N$ \6 a! n
" _8 \+ i; B+ X9 ha+b = 29 L+ [% f$ ]% I) `

0 N* P- c+ @2 L. S! s* f( g* ~. {then c is 1
0 [- Z7 A# m% T+ G% T5 h- \7 H; M& f4 M
a = 2 - b
# d! t3 B; Q: H! q) H+ ^
  A% U1 \) o, W8 X& a" P% nso 0 = 0
5 I6 e' Y" b. [7 z) V
, Y2 x0 M7 [/ m( ?

sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
# C9 h% x2 q: I冇答案ga....
' c  X8 D' i/ }/ M; J. r* O/ f# s4 N9 S/ O* e
2條equation solve 唔到3個unknown ga....

9 l% `* m5 ~( ?' `

3 A- o2 l3 t& y. U; t/ U2 l此言差矣~
3 y) }2 l7 N  G
, G0 N/ F7 s/ u) B2條equation solve 唔到3個unknown ga
& W; \7 u( r: t" r$ U' ^6 D還欠一個條件,就是3條equation都是linear independent(線性無關)的
- P& Q' _1 ?: V/ Y
- W* y+ c) N+ J5 W' E! u簡單點說,多元一次方程就是線性方程的一個例子
1 m; s* ]) m, q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7 h% O" I) m* u$ ^& p0 C2 d( R
  S" b, s' n: Y6 ~- Q  Y8 D. {
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~)
8 H! `$ u, }, Q. ]& L/ f: k! y例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
6 [2 \2 r& r& d5 |' g有興趣就解解看
0 T4 `0 k( E1 z3 X不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:( I6 [6 `  S+ {$ s
: {  E1 m' c) W

8 V% d. s( n- T: {$ w" L  ^不懂的話就問playplay,佢會知答案

& j: A& C0 s! [' ~1 d6 Q, }( h4 m

* w& b7 |* j0 V& F3 t

playbr2

Originally posted by sakura310 at  06:47 AM:1 E2 c: l, t  E" o- A, ^
捉錯處就唔敢當# \* u- r# J( p7 Z
不過,c=101n哥度(解...

  E' Z$ ~, Z, [( Q( D* |, s1 |

2 b- s2 D3 |. x* @2 q% o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4 k7 v0 ~6 J: i: c% \
反而適當地調節一下 , 咁會理性好多% Y$ [. T$ @7 ?% j
就好似隻game 由12粒珠 加到13粒珠咁
0 l% {2 r8 E& l4 \當''堂''好玩哂* e  G+ [3 f+ a5 j6 y

7 H; q2 _8 t( q: f$ j4 Xp.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
* b- v+ g5 d3 R8 _
7 d0 D) |* |! `7 L! ^
5 S& t4 n/ p( n' G7 ip.s. 求''堂''字正寫...

8 _$ h. T' P! R' S已是正寫吧