sakura310

Filename: DSC01158.JPG
" ?9 r% _0 S) sDatetime | Downloaded by | Counts
0 h- y/ W# V$ o+ R% ?- D" z+ R2008-01-18 00:25:24 | 阿感 | 2
3 B3 Q( _0 I9 A1 z7 ]2008-01-18 00:24:20 | playbr2 | 2" {0 W3 X! ~1 a' y
2008-01-18 00:22:02 | 但丁 | 2
' s6 x* h/ [( C+ ?# f
- p8 J, _& \# V: b點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
, P& v& u9 J+ ?: BFilename: DSC01158.JPG
, V# T7 a0 I( T6 \; \* y7 _/ I5 ^Datetime | Downloaded by | Counts9 R5 _. t% G# b. g9 q; X6 W6 t
2008-01-18 00:25:24 | 阿感 | 2) B! M1 O  c# z  t8 ?& y: Z8 H
2008-01-18 00:24:20 | playbr2 | 2
1 G9 {9 P% ?( J7 |2008-01-18 00:22:02 | 但丁 | 2
* R1 G' ^3 P" M+ ?% i" _" W- m$ k' A2 I% M& r
點解大家都down兩次? XD

' S3 z* U  A7 T4 Q+ x3 w% ?) d/ R6 Z
9 Q3 [5 ?  c6 t4 {
我第一次開睇左2秒就close 左
5 c7 ~7 m) I% K) K# M之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
- j5 P: e5 k2 m' m* LFilename: DSC01158.JPG8 K: `( V4 ~1 d8 I. ?2 l* ~
Datetime | Downloaded by | Counts9 ]' P# @$ @$ r5 }0 c
2008-01-18 00:25:24 | 阿感 | 2  Y$ r. q7 \; s) i# K
2008-01-18 00:24:20 | playbr2 | 25 w; |) Y, r+ a( \
2008-01-18 00:22:02 | 但丁 | 2
1 ~$ h0 B5 e& C7 D( C, f' V* Z- I( T& F1 ]% h
點解大家都down兩次? XD

1 ]5 `9 T/ ?5 Q! i' R4 ^! X. x- Z' ?

% i' {, d* H$ d, i" ^( s快d捉我錯處! p+ X- {0 }# w+ h+ R5 \$ f
話吾定我都打錯 + - 符號$ ?" s) l+ I& i' X+ J/ h# x! f) Y
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
' D7 g9 ?: a2 l! I% y不過,c=101n哥度(解除n係正整數的限制,只是整數); T$ D& f/ h. V2 j8 c& V
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~)- o- r+ i# e6 x  q
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
' ]8 M' S3 {$ a4 j但原先是不知答案,所以唔知有無失根
' ~5 ~' K% P  R( s& u2 q
! d% n; K7 |, D有時見到題目都感到有點不爽/ Z  h. F4 V. R! p6 r
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& l: N9 |9 ^7 y7 `7 d# @
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....- U( |5 x% ]! m) M
, n% N, h0 s. a& J1 r6 k
2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
5 q+ ]0 x' c+ O, r5 B冇答案ga....' F; x! V) M( |9 r; X
# w' p$ v& _  J( N# ^
2條equation solve 唔到3個unknown ga....

* U  @% U$ ?: H7 u* d( w0 E/ n
& M+ o0 T2 Z; J4 x
agree
. C  C/ m  Z2 p/ N  |
' ?" h- g( `' s3 M5 t6 ~2 equations 2 unknows& `0 U8 |8 W& [. O

( P1 Z) \- w' S7 K7 `if 3 unknows there should be 3 equations 1 P6 O5 ]: `, S6 y7 h- B0 ]5 {

  e' @& o6 n% r* G: _5 cmake it simple
+ s' B7 Q) v+ x
  h  v, G) h* W4 dsay
! T! [& n( ?9 C* y6 }' R0 [) r7 F4 e# e3 {3 b
a + b +c = 3- c: ?3 y; p% m5 O( c8 l
) ]! O/ ?: `6 k8 c: J* [* I3 v
a+b = 2# C- R  C' I3 m( B4 _
' t' ~  M! R/ u* P5 s5 G
then c is 1 ' m  Q2 h  p% w

6 }. ]+ u" R9 [1 ia = 2 - b
; i* }- e9 _4 R- j- y0 ^. Z- W6 G) q1 s) w# A
so 0 = 0
( ]) S5 _' J/ c! e% n
0 G: n( |8 B* [

sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:1 H0 c' G( R8 h3 O6 [. l: H
冇答案ga....1 N1 Q5 M/ V5 m9 i. t
7 J; a6 l: ~9 f$ g) g
2條equation solve 唔到3個unknown ga....

  o1 m. l* v9 U' s- q7 b" S! `

, p% r" l; l7 x* S此言差矣~
% C1 G: J. W$ h# K- R4 E( h
0 b8 g7 U, ?# w  t, l* u9 \, ~- W2條equation solve 唔到3個unknown ga$ o: l4 u' h" s; D& h7 I; W
還欠一個條件,就是3條equation都是linear independent(線性無關)的$ G7 p! {9 |6 X* |+ Y! K

2 w9 |1 I' e: u4 f/ o, F+ A簡單點說,多元一次方程就是線性方程的一個例子
+ l* I( ]6 z/ `# L& Y3 }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+ I! Z" V8 i2 f& b

- j# z1 d/ j2 D5 R+ P5 N* c# `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~)( L% D4 v1 Y* l, ^$ F+ G$ Y- V4 ?
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
: V' d5 B2 o9 _8 O, g; c有興趣就解解看
3 D/ O% D' u! C0 I1 M2 P) p不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:
, N5 v9 p% _8 L% x) P
) a( p) W2 w7 @$ g
0 S; A9 H4 Z3 A; i, e  x; Q不懂的話就問playplay,佢會知答案

' O3 p( Q/ P1 E9 |% K6 ^% k4 R2 h4 r
. v4 X: |3 E* p! T, J& x

playbr2

Originally posted by sakura310 at  06:47 AM:: g; n# s% V% [2 Y# h
捉錯處就唔敢當
- a- Z1 B' a, Z6 O& c) R2 q, |5 n不過,c=101n哥度(解...

6 P2 I* v, x- Z& r" y) O
/ R1 G( b; _& ]: |- x1 _+ i/ _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- j" B: Q6 A* Z& L% V; M3 l% G; M
反而適當地調節一下 , 咁會理性好多% L: M  m6 s9 m$ Y( R
就好似隻game 由12粒珠 加到13粒珠咁8 V: U2 {; {, e$ N. m# f6 f
當''堂''好玩哂; }; x8 y  r' D8 z
9 o6 o, g; ]8 H! o" B% b
p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:4 O, y4 C( f/ ^# u4 m

1 l) Y* q! K9 A( i2 r
( j/ [" o1 s) _* s! }* U0 Kp.s. 求''堂''字正寫...

5 @5 c3 R1 J* e4 M( P已是正寫吧