sakura310

Filename: DSC01158.JPG
! R. H: d& \2 h- [1 k+ H# e5 Y( ^) lDatetime | Downloaded by | Counts3 Z2 R' c+ Z. }+ r4 h" s
2008-01-18 00:25:24 | 阿感 | 2
2 I2 s. x; p: {) u2008-01-18 00:24:20 | playbr2 | 27 D" |( M& C) b) d) ]6 Y) S4 |( e
2008-01-18 00:22:02 | 但丁 | 2
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0 R0 D- \1 s; v# _點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
) M5 K4 k0 `. A; x  W" CFilename: DSC01158.JPG
$ S7 O1 \( a# M; W' I! lDatetime | Downloaded by | Counts
8 S, h$ q# B- b. V8 p2008-01-18 00:25:24 | 阿感 | 2
5 s' C+ ~, U) d* _# J: @/ L  _- z2008-01-18 00:24:20 | playbr2 | 2
2 y+ W: T7 N% w9 u( ~* v( N2008-01-18 00:22:02 | 但丁 | 2, w1 j. o7 b( l: b! P6 }% r

: h6 a! \* y4 \  o" U點解大家都down兩次? XD

8 k9 t6 [; M9 ^5 e- I2 g9 @

6 o. e! a1 L! U) N7 I我第一次開睇左2秒就close 左* h" l( k: x& r# Q, a4 U
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:# T9 s, z  Z8 l- a( b$ A7 ]3 c7 x
Filename: DSC01158.JPG. n/ i/ b- P, R4 T2 V
Datetime | Downloaded by | Counts
. u$ _6 Q: S3 `: N$ C8 T/ Y2 K2008-01-18 00:25:24 | 阿感 | 2
# z# Y+ X5 P9 R7 {& j: m$ R  V2008-01-18 00:24:20 | playbr2 | 2
. z( ?& S6 P, v( y$ }2008-01-18 00:22:02 | 但丁 | 2
0 D; r( X+ t$ N8 ~* h4 x0 h7 t  T: o0 N, h
點解大家都down兩次? XD

+ q4 a% H: f$ k9 J0 B% b9 b; c9 ?. ^; H
快d捉我錯處
) A0 p: @8 t# X& G話吾定我都打錯 + - 符號( m  n% A* q( ]4 C1 Y  @$ q
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當% \! k7 |& G% K& B% Z1 ?
不過,c=101n哥度(解除n係正整數的限制,只是整數)
# d9 R+ W% A; `+ s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# Y1 L4 z) k, Y8 `* X5 u- _知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
/ J' ^) F; C. p9 H+ [但原先是不知答案,所以唔知有無失根0 C+ j0 S; q( w$ c6 O. O* j

; \' g0 E8 G4 g' C" e4 y# m! x有時見到題目都感到有點不爽9 L  P  _2 L7 j: I5 s; W1 s
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 j1 x) _( F6 \3 z2 f
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....7 l0 M8 v( U7 Y6 I0 |. ?+ b
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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:, s) v' T$ q) V
冇答案ga....8 b8 s2 \8 H, L  L
2 g6 ^1 _' @/ s( U3 J0 k, e4 X
2條equation solve 唔到3個unknown ga....

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1 ~+ k4 o8 _9 Jagree 7 {/ h6 r$ i" I: r) \  L
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2 equations 2 unknows
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if 3 unknows there should be 3 equations
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make it simple
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say
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- @  N/ [# @2 u/ h5 Y( qa + b +c = 3
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: N: g6 X" D+ I! h$ Y+ W( X3 j1 Ha+b = 2( h, i+ m( a- e) g; _! `) B
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then c is 1 + x  J( Q' C8 J( }  H+ u
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a = 2 - b
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so 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
% z+ u2 w& s+ b. r1 c9 F- x2 x冇答案ga....
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9 Q1 f7 W0 a. e2 O! @7 O2條equation solve 唔到3個unknown ga....

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8 X! T3 ^3 P) c' P此言差矣~$ z0 h) F5 y# y4 [# a! u+ I

- g' b* P! S9 \2 z. S2條equation solve 唔到3個unknown ga# N0 `: v: `# \5 Y1 J& S) m' O
還欠一個條件,就是3條equation都是linear independent(線性無關)的
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* I; r1 y% d* I* e% Z/ t! z簡單點說,多元一次方程就是線性方程的一個例子
) Z" A( k- o8 U# C7 s' m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& P5 M6 G2 S5 I1 Y
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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~)6 ?* V! ]2 y7 I; _! r
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解& Z. ?* o- ]3 V& F; \3 ~. g
有興趣就解解看; i4 Z# p( S, J" o& I. y& G2 R
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:# {  z4 U- I7 L

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! |& Z2 `; n, x% R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:
% S- E% f- G- P- R捉錯處就唔敢當
/ E2 v( {% J6 S3 f9 u4 }! t不過,c=101n哥度(解...

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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& ~  t! S8 N2 T5 b- A' J! _) `& A
反而適當地調節一下 , 咁會理性好多
. ]! |) S! l& ~2 e. I  z0 @& l3 {就好似隻game 由12粒珠 加到13粒珠咁3 r9 G9 [# C9 i8 a+ X' _. a
當''堂''好玩哂
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8 q/ P6 y/ y/ H" Z: qp.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
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$ t5 e  B7 Y" O: sp.s. 求''堂''字正寫...

* ~' ^& U/ Q6 K$ E) w已是正寫吧