sakura310

Filename: DSC01158.JPG
& d3 h6 X+ E0 ?" t7 e! }Datetime | Downloaded by | Counts
2 X, @$ {+ C- t$ M# A4 g2008-01-18 00:25:24 | 阿感 | 2) B3 z$ N+ X& x; b( v
2008-01-18 00:24:20 | playbr2 | 2  ?1 u9 L% b+ k' k
2008-01-18 00:22:02 | 但丁 | 2& t2 @/ z6 P' A5 d/ `# Z# C1 z

2 e. W: E7 x3 T& d9 b% T) O點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:6 g, u+ @. w! a5 L7 E8 u
Filename: DSC01158.JPG) N& j2 A2 w7 g  O) G
Datetime | Downloaded by | Counts. m8 j" C$ ~% ^
2008-01-18 00:25:24 | 阿感 | 2
2 O' D& P8 ~' G5 ?: Z2008-01-18 00:24:20 | playbr2 | 28 Z& l# Q4 u/ H0 I
2008-01-18 00:22:02 | 但丁 | 2$ z$ V' H# U4 ^+ `( f

; f% r$ G9 B2 o- _" u7 ~4 S點解大家都down兩次? XD

' |3 w% R. i, H; ?1 Q; @
: ]7 X7 r! d0 T0 v$ A; R我第一次開睇左2秒就close 左, b7 y+ ^; J& F/ e; D
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:7 P, }0 D2 E' i! P& i  T
Filename: DSC01158.JPG
0 g! o  |; z6 K6 n& b8 X7 cDatetime | Downloaded by | Counts
* ~' W4 @5 F) t8 v4 \+ B' v2008-01-18 00:25:24 | 阿感 | 2
3 i. |/ n7 Z, ]2008-01-18 00:24:20 | playbr2 | 27 `( s+ V: Q( S2 ^, ^
2008-01-18 00:22:02 | 但丁 | 2
, P) u  k% c* m3 X! Y. }% t6 a
& z- Q3 C' ?( [' F& A0 y( P/ B" F點解大家都down兩次? XD

  M" e9 c6 ~7 t! v  y6 h1 A8 M/ N7 L. T8 E# f& T
快d捉我錯處2 F* ~0 h3 K! E# V+ H
話吾定我都打錯 + - 符號% N+ [/ w" k1 v) l/ g7 v2 X/ ?
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當+ P5 i* W: q4 S
不過,c=101n哥度(解除n係正整數的限制,只是整數)
( X2 `8 G0 X4 x8 o2 o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~)
- x: T# X8 e2 F  X5 `知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題- ]# J6 J$ X. n. J/ w0 M. M
但原先是不知答案,所以唔知有無失根! q% I% t6 T! H. v1 ~

7 r/ X) h; _& \/ x. f& C, {有時見到題目都感到有點不爽
! `; s0 F5 V6 J' a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$ b) t/ W& `& ?, V. A
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....
$ Y) ]* p* O, y, X
9 X7 D" k& m% J7 X# e2 f2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
- o! p5 R7 q7 j/ C5 N/ R6 o" Z冇答案ga....& f, w# E- G- L) [

1 P! J+ x# y5 x9 c; N2條equation solve 唔到3個unknown ga....

% V4 U6 r+ Q2 F
. a- a6 }6 }- u1 S
agree
; {, `" m& [6 J/ |( Y% E# i
3 z4 y0 H" O6 O* L6 \3 ]2 equations 2 unknows: [1 J5 @  n* n* d
" e( {4 [5 ^  v1 d% F6 @# ]' W) a
if 3 unknows there should be 3 equations
" r7 Z9 `( K( w5 K% _! ~* D
$ h" t$ z, P6 @* c6 T/ J+ Z" }make it simple   R3 G3 ^" l3 s! V  [: U
( o( U) k# W8 v: d
say
" l2 n* U  Y1 i" [+ _2 H! I
7 [6 _9 Q1 r) D2 O! n4 Ta + b +c = 3* ~. e6 ~) }# w* @& z

4 S( E: r9 u  W. \; x3 ea+b = 2
% ?! s4 P; j9 G1 E& o9 p1 h8 a: Z  f
then c is 1
8 M, @6 p5 M) R
: A# x* f: d8 e! p& X4 e3 ]; U9 sa = 2 - b
( S" A% z" e1 c! k& f: D: w+ ?. E1 [" B# q# f
so 0 = 0
: `& u. o" R+ z/ x9 D+ g' m2 J( Y1 V; Y4 x

sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:5 D3 r2 y, y' k) ^7 w
冇答案ga....
) _+ {3 N9 v- F7 c7 H3 }/ z9 j& |4 H+ c" v$ D& c4 j' k2 w; }; A
2條equation solve 唔到3個unknown ga....

6 @1 j& f$ _# C/ G( V! ^
- H0 w: [7 S, c* ?2 ~/ {9 A7 {! y
此言差矣~
( C' E4 Z- l; h3 M+ Z3 G& J1 I. `4 S5 N+ e; U, K
2條equation solve 唔到3個unknown ga
- J; M, D9 ?1 H9 V- @. k還欠一個條件,就是3條equation都是linear independent(線性無關)的, n# G% W1 d: I
4 C5 ?. u# v3 a6 x: r( j
簡單點說,多元一次方程就是線性方程的一個例子/ o& r; c. |1 T, ~' k9 I8 i1 g
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! p0 u+ _6 r, h+ z! P. x! M

; u% d) q' i4 ]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~)' N8 a2 s0 Y: R0 `" M3 M! a
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解. B* L& O0 ]4 C9 B, k2 X
有興趣就解解看( A3 H; A: @4 C2 _# H- g5 A
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:9 g+ c9 }4 J5 l5 `& C! W- Y' z+ a
4 h' }/ _2 L1 |5 [2 `2 v
8 N( ?' A) Y  G: J) M( M
不懂的話就問playplay,佢會知答案

5 {7 x% \! m$ ?. Q: n
  Z# g' H! T2 w) W) O+ n

playbr2

Originally posted by sakura310 at  06:47 AM:) W" r" x" i6 P7 L! v0 Z! B
捉錯處就唔敢當
3 x: b1 L8 a4 ?不過,c=101n哥度(解...

7 u: m. m9 l+ h3 u6 l  F9 S

) b8 ?& y0 ]; x/ O8 B( Z) {( _4 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  y. P1 w! m* x/ L4 L2 j
反而適當地調節一下 , 咁會理性好多
# {9 ]8 M# r1 H) w! `: a0 T- e就好似隻game 由12粒珠 加到13粒珠咁% B, c0 H' u7 B7 N7 L1 O. z, v2 Z
當''堂''好玩哂( R) f& L: K7 @1 z8 y7 @

; m$ e/ u; L$ O, F1 Z- Pp.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:7 y7 d, X6 I# q& z' @

2 E5 G0 H9 d1 n) J6 k2 p3 I
0 J6 i. q& [% @( \0 B$ F* |p.s. 求''堂''字正寫...

. D/ T% k8 V  c$ [
已是正寫吧