sakura310

Filename: DSC01158.JPG
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2008-01-18 00:25:24 | 阿感 | 27 p: {9 H# H& t9 N' z- @: J9 v
2008-01-18 00:24:20 | playbr2 | 2) W' ], S5 l3 p6 N$ B& y; ^
2008-01-18 00:22:02 | 但丁 | 22 P1 f2 O) R4 V- ^7 H

" O7 i' ^+ v7 \點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:- r0 R% F1 }! {, Q3 x0 A
Filename: DSC01158.JPG
" o& H: H. Y) T3 e6 t. gDatetime | Downloaded by | Counts6 E( z' f9 t1 G) A$ A6 N* e( p; O
2008-01-18 00:25:24 | 阿感 | 2
$ L) A7 z" G! r) D( J9 c: t5 H2008-01-18 00:24:20 | playbr2 | 2! M1 X+ }8 V# ~1 r$ W. T
2008-01-18 00:22:02 | 但丁 | 2# k- e, i" f, i3 |, J

3 l2 l: V( v5 |# n0 L點解大家都down兩次? XD

( h7 m% G5 ^" j3 m9 X& B
1 j' Z- P, V" {# \2 L我第一次開睇左2秒就close 左
: m# e* X4 q# O  H; S之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
2 @7 w. y* G* g0 @. {Filename: DSC01158.JPG
0 X; u7 \# h; W" z2 G8 ~1 X2 S2 A! JDatetime | Downloaded by | Counts, ?2 T3 E5 P( T5 H" ?7 |
2008-01-18 00:25:24 | 阿感 | 2- {5 r7 P" j+ H0 L' M
2008-01-18 00:24:20 | playbr2 | 2# h- N1 A7 O1 _* n# f
2008-01-18 00:22:02 | 但丁 | 2
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& A( y' c# E0 T5 P4 f: s! W9 q點解大家都down兩次? XD

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! a+ h5 l& s8 r2 X2 q8 I4 y9 x& F快d捉我錯處6 z5 h+ A& R1 m6 E" p
話吾定我都打錯 + - 符號2 _2 f; f: c( h" _. j& _- y; a
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當" I) n9 Q; O+ l1 O" W9 [6 b. F
不過,c=101n哥度(解除n係正整數的限制,只是整數)/ o& W7 P- p7 r' A: {
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~)
; R% p8 }1 B  q' U知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題! y& j. g9 N9 |8 y/ s) _) _* E
但原先是不知答案,所以唔知有無失根. V: B4 d! G1 o) y( b+ ^
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有時見到題目都感到有點不爽3 v8 i5 i8 o, m6 f, 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
2 R: O8 X" C; ^( [. S0 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....: f+ L: b5 \- `. {  p
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2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:; |! H* I! x, ^' V  E) [1 B4 n- o
冇答案ga....  M  _- A: Z% e9 C

! ~0 f) ~  m& R& O$ g9 n2條equation solve 唔到3個unknown ga....

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! ]6 ~9 u) M6 T3 ~agree
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5 g6 n" J& R* R/ L2 equations 2 unknows4 n* _; U2 v% x

& p& ~( w2 r; `8 Iif 3 unknows there should be 3 equations 5 F4 O- z; C+ r! u7 ^

2 c. X( c% R9 m* R. s* dmake it simple ( W# a5 U4 r: R" S

; B+ @& [9 U$ t2 R* z1 T! fsay ' ^5 a4 @+ `" w. G
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a + b +c = 3
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8 ?! e, r4 ?' f3 Z5 [7 }a+b = 2
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) ^" V& X9 ]  [then c is 1 ) R* e0 M) h$ |) n! z4 D

! u% b$ {% a5 Q6 @a = 2 - b 6 r; w+ e: h3 J* T0 B. y- c+ G

/ T) x" e; p- W8 T! Y9 Cso 0 = 0 ) o& ?5 c6 {6 z* i
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:; o, E. p, O3 O8 h" D
冇答案ga....
1 K" ?' S; J0 J8 q4 W( V
' e  H9 n9 H: R+ ~8 I2條equation solve 唔到3個unknown ga....

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此言差矣~
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2條equation solve 唔到3個unknown ga
; k4 X% t4 x# R  a; I  U- C# J. {5 t還欠一個條件,就是3條equation都是linear independent(線性無關)的0 a% u" T" u7 ^2 S

' o6 m8 f! \4 a0 m簡單點說,多元一次方程就是線性方程的一個例子% Q0 ^$ V/ o/ p$ Y3 p9 R5 h
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
% I3 I2 w1 K4 ~9 g- k( D7 }& u* |2 V! [* ^8 q7 C1 a  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~). r; i8 u& ?; @
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
! ?& O5 L- i- T" I$ B. s+ o6 m有興趣就解解看( z1 d2 q2 e& a& M% e1 Q
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:
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) G& T1 X$ [6 W4 ^) v/ Y" c5 k# W不懂的話就問playplay,佢會知答案

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playbr2

Originally posted by sakura310 at  06:47 AM:
5 C7 a: w$ y# b捉錯處就唔敢當
2 j0 ^( K7 P4 T& o9 {% t不過,c=101n哥度(解...

2 b/ `; {+ n5 c; Q( p

3 f5 C2 e  g& `. a6 J( 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
, q( S9 Q% k* r  w' ~# Q$ o$ p反而適當地調節一下 , 咁會理性好多
! c4 O! R& r. b( m就好似隻game 由12粒珠 加到13粒珠咁
# {* S/ }) s- a7 O3 u' G, U$ b當''堂''好玩哂# e, t: {' ]6 j6 a! \

0 l; L/ H0 h1 O# `5 P0 F3 {p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:/ u9 N5 ?$ P1 [% X

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3 F) O8 }  j. K: ~0 g; Op.s. 求''堂''字正寫...

$ f; C( m- N' s' H已是正寫吧