sakura310

Filename: DSC01158.JPG% B" p# G4 |' \! i" q$ X$ A% O
Datetime | Downloaded by | Counts
* H" }, d9 ]' T* b0 @, I' H2008-01-18 00:25:24 | 阿感 | 2
6 N* ]+ D  Y- L; s4 r2 b2008-01-18 00:24:20 | playbr2 | 23 D. Z5 @) g" @' O2 Z
2008-01-18 00:22:02 | 但丁 | 2# U1 y) V5 w, x% B+ y

2 h7 v4 M5 u9 j6 c2 U# O% W點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
: t# W/ B( S6 N, t" OFilename: DSC01158.JPG
) A2 M9 T0 I3 U0 K% F& v: vDatetime | Downloaded by | Counts9 I' {4 t6 a3 G
2008-01-18 00:25:24 | 阿感 | 29 P6 l* Z: i, b1 g
2008-01-18 00:24:20 | playbr2 | 24 f" g) a: z  U
2008-01-18 00:22:02 | 但丁 | 2
  t5 e! ?7 {. s- h9 b
' J! W# X0 v8 |8 X! g4 \/ C) s) j點解大家都down兩次? XD

  w- \3 a* O, k0 L9 B2 O9 i( L( X& {. C/ B
我第一次開睇左2秒就close 左
, ^3 C& B/ i. w/ ]4 ^9 @之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
' P; A; m% B. t5 C& L+ NFilename: DSC01158.JPG
. p" n3 n3 f+ ^- W. n* P4 Y( VDatetime | Downloaded by | Counts" t0 K& z8 G. x  ^
2008-01-18 00:25:24 | 阿感 | 28 \) i+ ~0 y9 ?- t
2008-01-18 00:24:20 | playbr2 | 2
) ]9 ^0 p4 ~* y0 @2008-01-18 00:22:02 | 但丁 | 2
- j- [2 e4 E; k" o6 \2 q
, O8 o8 B( e3 e) a. d& u; {( z點解大家都down兩次? XD

( |$ b: `+ j' Q+ _, p% t8 ]

( ~! ?: Z8 p7 q9 o快d捉我錯處
* Y4 Z1 p, [, H+ V/ n/ s話吾定我都打錯 + - 符號' a* M' \( W% f! e' A% D
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
" V) A/ f! F8 A  H2 W" R不過,c=101n哥度(解除n係正整數的限制,只是整數)- R8 U3 D0 G! ^3 @
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~)) C  y/ {; F$ }. w, k/ X0 ~
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
. r% N0 V! v! Y" [但原先是不知答案,所以唔知有無失根
. @* j, J! r! ?3 {6 J' a( |$ f
' G) u% ]  n) m+ N3 _! L6 ^有時見到題目都感到有點不爽
  c2 N3 ^7 i* X5 J1 Z2 A3 ?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
6 a: a5 L2 g3 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....$ V+ o  n6 t$ u6 h5 n; E. M

' U6 }" k  i6 {% {: X0 e2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
) g, t5 W4 u+ y* s冇答案ga....
9 c9 K7 X) x1 y' g
4 [9 E0 t& n: m# {2條equation solve 唔到3個unknown ga....

3 X" g) A' Z$ y4 z
# r& V. Q' W: |5 K* H; [agree 6 J5 ~9 d1 V6 Y, u

! Y6 u: U( I+ t" P1 o" w6 v% C* |2 equations 2 unknows
# @9 ^& l( [6 ?4 H8 s0 t% O2 R/ T8 ?
! _3 c& y. h9 O$ p0 @7 O/ ~* sif 3 unknows there should be 3 equations
# M! R% y8 w; t  l/ Y
1 E5 _8 E' M) o) K8 a) emake it simple / H2 A* ~) t8 l8 J) w" h  {; M+ R
  A1 G5 k7 S* Y. O0 \
say 0 X1 b& u1 ^4 m

  ^+ T. Z' Q8 g8 w! `a + b +c = 36 _6 L9 `% L& ^6 @3 }9 F& }7 V

- x3 u. w, ?' S5 ?a+b = 26 X% p% E. ^  P  X3 y, a

* ]* Z7 E0 g$ y$ mthen c is 1
" p7 W; M& ?) E0 R' P+ S
% _8 ]# j$ [1 r. a! Ua = 2 - b & b) `: E% }# ^8 b. N  ~
) E% |4 D. m1 O# n1 v
so 0 = 0
9 c& ]+ w1 p4 G/ [& [( w, v! y! ~4 C/ g3 S6 E" G  S" K

sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
1 n, i% ^+ }% h% a) h冇答案ga....8 e. U$ q, U/ m) T

. ?" q2 K' g1 N. P1 M" u2條equation solve 唔到3個unknown ga....

9 R% u% }* P* |* L% J% F; D4 E/ Q1 Y7 w7 J7 w( r2 F
此言差矣~; R# d& |! R: B2 r, k

) {# K0 f2 }. }3 t2條equation solve 唔到3個unknown ga7 @" {7 Z; p- n  k. o# i6 K
還欠一個條件,就是3條equation都是linear independent(線性無關)的; s3 H9 O, \% y$ t- J( s

4 N! ?- T: R4 C6 d- e9 }1 n! ^! @簡單點說,多元一次方程就是線性方程的一個例子" y' i  k  u6 \
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
. m! ]5 i# N8 g9 \$ x
* W/ N. Q2 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~)2 V4 P0 }* N: Q+ W$ I$ G
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解! l. m. R2 _; j: N5 w, t1 x; f
有興趣就解解看) H2 `; z' B$ x5 A9 @
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:0 X) _. b1 q1 P

8 X5 A9 z$ j5 n- y8 i, b1 w  ^$ j7 }* T3 r5 e8 g8 n
不懂的話就問playplay,佢會知答案

3 i+ H6 y/ ^5 p; N) O" S, P
( e7 ~+ l& Z/ P: r& T9 c5 U

playbr2

Originally posted by sakura310 at  06:47 AM:
& U( m$ z3 _" [2 m! j, @; h捉錯處就唔敢當
6 B/ |: W/ P8 X" Z! q不過,c=101n哥度(解...

/ @! Z6 F6 p4 w
3 w- k- f3 F4 e  j4 r# ~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 {! \; D' D; C2 D. T
反而適當地調節一下 , 咁會理性好多8 g# ?6 `7 ]# g/ R- W- ]
就好似隻game 由12粒珠 加到13粒珠咁
$ ?4 z' ]9 d' z( {當''堂''好玩哂. H; W( G% W/ [: t0 ]

# i, E- K! E" L/ `p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
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  w9 I8 w+ V6 V+ Gp.s. 求''堂''字正寫...

: M: q3 R, K. c: g1 Z9 m已是正寫吧