sakura310

Filename: DSC01158.JPG1 B+ W" [( N" [4 Z' F) S, S, X
Datetime | Downloaded by | Counts
# W! M$ }5 D! y+ x2008-01-18 00:25:24 | 阿感 | 29 A& x! n: w+ y* k
2008-01-18 00:24:20 | playbr2 | 2
9 T3 V( ^) \/ t# R) b, z) K2008-01-18 00:22:02 | 但丁 | 2; U5 J& Y  ]% @) P
0 E" m) U8 H! e! n2 _* F4 C
點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:( ~7 T7 Z7 u, d4 ]
Filename: DSC01158.JPG
2 y1 Z: n. p4 t$ A2 ?Datetime | Downloaded by | Counts
' P/ \" m- p6 O+ |% J, I2008-01-18 00:25:24 | 阿感 | 2$ W+ v, z2 N( b$ H2 ?8 C- d
2008-01-18 00:24:20 | playbr2 | 2
  ]; j" r* Q7 _# c* z2008-01-18 00:22:02 | 但丁 | 2( t9 c! B$ b- t  q7 e
! G! h3 ?" }. p7 a: f+ c# b% f
點解大家都down兩次? XD

$ x( }' L, M/ g6 M6 _% _! T

& [8 G* }+ K6 j5 w& Q我第一次開睇左2秒就close 左
6 q$ N8 y' J- y之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:! i2 T" w+ _. z  Y8 K
Filename: DSC01158.JPG( C% g% z3 o, ~' P( t) o
Datetime | Downloaded by | Counts8 Z5 O0 ]9 e; V4 A& N; Q6 P
2008-01-18 00:25:24 | 阿感 | 2
0 J# H8 w( }( o2 P. h1 \9 [" w2008-01-18 00:24:20 | playbr2 | 2, }+ j% z- f, j0 `! ^# R
2008-01-18 00:22:02 | 但丁 | 2
+ d1 ^$ I; i9 b0 e! B" }* i- L7 u3 Z$ l8 I. l$ s
點解大家都down兩次? XD

) `( A! V% d  ~5 N4 {5 D# K8 R
( K; [6 d2 k" m" Q3 }$ F; V# r快d捉我錯處
+ m. p7 I  L3 z. n( U( s' u# a- t話吾定我都打錯 + - 符號* E: s! j+ v/ \2 Y- j
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
5 K$ B' [6 M( \# z5 X8 e% @4 `不過,c=101n哥度(解除n係正整數的限制,只是整數), V5 i7 f- E/ D; C9 b
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 j2 w# E8 J+ x
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
* m' z2 r0 z0 ~5 Q3 v' R但原先是不知答案,所以唔知有無失根7 D* K5 }9 V& y$ }9 Y
, n* c* x+ @1 Y$ d
有時見到題目都感到有點不爽& n# a, H2 o$ ~) a/ z" l& 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 P- e' {# W  \, _( T9 }/ 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....9 P, L( ^4 q+ k
! y: Z7 ?9 [. d% ?) p4 k& e: T, [- x$ X! d
2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
5 W* a! f) O1 I  `5 D冇答案ga....; j2 _$ P! H5 ]( N
3 W! M4 `* Z! f5 a( G! {
2條equation solve 唔到3個unknown ga....

: B$ |0 ~* j& q0 J' f0 q" j6 u
- l3 l- U7 B: Nagree 8 |0 I" @8 N1 l: y, |5 L' n5 R2 v

* O% ?  t$ X' ~* q3 H8 S+ T2 equations 2 unknows4 G& o) C$ V7 r" b3 m

! s+ [6 B6 y6 I, n4 h& }  A8 ~if 3 unknows there should be 3 equations
% c% R% J; o; g  n4 a/ A! a; Y" f9 Q9 P5 i3 \
make it simple " a" I; Q/ t6 M2 N$ \4 y+ }
0 G1 x: O& F7 U8 m4 g: W, J7 {; [/ ?
say
7 s# C1 l) B: }( p0 C
  M% \0 a6 j# H: ~& t( z% o! `a + b +c = 3
1 G: I  M  }. p0 V; W; [3 e# Y1 N' j3 e
a+b = 2! s) P8 v" v% m4 v, ]0 N8 b
0 K& H) \9 h; z: k. |
then c is 1
9 n: I5 z& o( V* b0 f! k5 ~9 K" v& d) u) j2 v
a = 2 - b : Z: \& x7 j. k* @  d( \

# A9 A& r2 W/ L! m  Dso 0 = 0
6 t( p4 w3 I0 o7 \; k
, H* t, ]9 V- u& ~2 e0 E

sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:: {9 f* H- w' k2 |, Y3 V6 y7 S
冇答案ga....! X# t" a& a' T, l  L" p% W

: G& s. M& D9 y3 x1 A& e- w  t& C2條equation solve 唔到3個unknown ga....

! P; @; ~% ~: S( A% K9 N6 e  l0 I" A9 e. n8 S0 o
此言差矣~
8 _3 x+ j% G  c( z( z" ]9 |2 E
" u2 d8 b" {7 i2條equation solve 唔到3個unknown ga8 t+ Y( A3 V/ W2 t, r3 F
還欠一個條件,就是3條equation都是linear independent(線性無關)的7 ^1 U# L6 J- v) I

9 p* \. h, K; s簡單點說,多元一次方程就是線性方程的一個例子
5 H7 x1 X. F: l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 o+ ?* f' U  q

6 C7 X# ^. O3 x& V4 F% `1 M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~): |& }" K4 e( M
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
9 N3 n$ T2 g) h, @5 {+ D0 g; A! C1 ^8 ~有興趣就解解看. A) s9 X% Z% A% w" c4 A
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:' v' g" R3 [& f* D
& m, \* m0 E# V% m; z

. k6 L9 c  n& ]1 d0 ?8 E, X不懂的話就問playplay,佢會知答案

, x" ~2 [' m$ @+ F( D6 X  n- c  `! q9 z

playbr2

Originally posted by sakura310 at  06:47 AM:; {* r, G, U! d( d7 X, W0 Q
捉錯處就唔敢當1 a6 t0 L  o& k+ t
不過,c=101n哥度(解...

0 S. k- L) s8 [3 \! V# j5 `' m3 }7 W$ A6 E8 c- C% h% L$ Y
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7 U- P2 N6 i4 E1 D) ~) u
反而適當地調節一下 , 咁會理性好多1 F+ n  X7 k, P9 L, M
就好似隻game 由12粒珠 加到13粒珠咁
! c( _' j- U% C/ N. V當''堂''好玩哂
; `8 s$ @+ `. K
1 @) M; i/ T+ I# z& B4 F! mp.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
) w# J3 W7 `1 K" Z: {* w
! {/ x7 {1 U. j& D0 F/ s- U; ]" o- \
p.s. 求''堂''字正寫...

( U( e, v" ~9 i3 a
已是正寫吧