sakura310

Filename: DSC01158.JPG8 U8 f" d' ?, T# N
Datetime | Downloaded by | Counts
- w, A/ u. Y7 \1 T2008-01-18 00:25:24 | 阿感 | 2- M. t3 V' z1 S2 }5 @: m
2008-01-18 00:24:20 | playbr2 | 28 N: w) k2 j% R4 w; t
2008-01-18 00:22:02 | 但丁 | 2# {3 V4 Z+ o* v
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點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
- @/ ~0 q9 V. d4 e& A! k; @Filename: DSC01158.JPG
5 x3 Q* U) @; @1 K5 X& \! iDatetime | Downloaded by | Counts
' f& _' B4 _' f2008-01-18 00:25:24 | 阿感 | 2: _4 C6 p% M2 j9 O2 _% d. \+ r
2008-01-18 00:24:20 | playbr2 | 2
! P( t) ^4 j5 {  `- t2 {2008-01-18 00:22:02 | 但丁 | 2
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點解大家都down兩次? XD

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我第一次開睇左2秒就close 左# J, B8 ?' k4 E$ O: O) b" V0 `+ [
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
1 ^2 D( j3 m+ W/ T) I4 W2 pFilename: DSC01158.JPG
" n" [) b! e! `% ?% P0 b0 F1 T: MDatetime | Downloaded by | Counts5 B4 b2 }) c! ~( b+ m
2008-01-18 00:25:24 | 阿感 | 2# w/ M2 }$ t; T
2008-01-18 00:24:20 | playbr2 | 2
( _3 ^% J" ]2 O8 c, C" j1 t2008-01-18 00:22:02 | 但丁 | 2
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6 M/ w" H0 r  E' ]" {點解大家都down兩次? XD

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# X* t2 b$ ~% O6 B0 A1 B快d捉我錯處
: t! v3 z; g. g. q話吾定我都打錯 + - 符號
! i1 U# ]+ `# A! p' H係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當* P5 E! Z* Q: l9 G
不過,c=101n哥度(解除n係正整數的限制,只是整數)+ l' B1 x( @3 @, ~9 W
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~)
2 B3 ]5 f4 ]% [知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題& e5 N2 g! z9 P: R: n0 m6 f4 I( _) r
但原先是不知答案,所以唔知有無失根
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有時見到題目都感到有點不爽
: ~/ q! k$ k; ~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
9 m  d# L( l; l' I3 |! q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..... ~' L- A; R# f
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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:! e- t" t) _* B- \  Y$ Z3 [8 b3 R
冇答案ga....
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& |% I8 U. R. c% o5 b0 f2條equation solve 唔到3個unknown ga....

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agree
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2 equations 2 unknows
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if 3 unknows there should be 3 equations ( t0 |6 ^( `& }, a# G) J" _

. M) o' z9 I1 Z+ Omake it simple 8 o6 Q* w5 T# K# {% W

# _: F6 C% E- p5 n2 [3 [9 x2 Tsay . N# t, U$ b+ r# y! c

/ l$ {& U3 ]$ c/ C# C8 o/ ~a + b +c = 3
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a+b = 2
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then c is 1
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) \' q( A7 Y- Q6 e4 Ka = 2 - b ! K1 X2 M6 }& k, {

/ o/ }  J5 m( x' K3 R! E! ^3 y" B! Lso 0 = 0 " c- \; u( I/ _8 C2 E! z6 B

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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:( _1 F( P: F/ j$ \& W
冇答案ga....2 x/ k5 a) [4 a! [( `9 }) ?
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2條equation solve 唔到3個unknown ga....

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此言差矣~7 R6 O7 N' G8 j5 T- {, N; s. j

0 u4 e$ T* V* P# N5 ?/ n2條equation solve 唔到3個unknown ga# K2 y$ @  a& y% H
還欠一個條件,就是3條equation都是linear independent(線性無關)的& X5 x3 ?7 G; I" |" S  b! Q& x9 ?

5 v6 W9 I  U; M3 l: a簡單點說,多元一次方程就是線性方程的一個例子6 j, V3 K2 C2 \2 k
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
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# N. S. O- N3 f6 @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~)1 L& z7 L$ M! E+ u. _* h; A
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
) w: \( f- }" w1 x$ s有興趣就解解看6 {6 {6 j" V+ D6 u
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:2 P" F; `" }' a+ l( g* k/ z
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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:% U' d7 l( L3 Y. f+ \
捉錯處就唔敢當
0 ~# ?9 f; f3 u; M+ t- @不過,c=101n哥度(解...

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1 M8 }/ V6 `# I& C( g# {4 }9 y+ p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 U* q4 [9 l* E" `+ K0 |8 ]+ W; N反而適當地調節一下 , 咁會理性好多
; E( s- H/ x) j8 |就好似隻game 由12粒珠 加到13粒珠咁7 F8 ^3 [8 E1 X- o5 {: ]
當''堂''好玩哂: k! r* J* t. d4 q
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p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:  i7 v2 P/ l5 z
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p.s. 求''堂''字正寫...

% x! j8 u& q9 l9 s已是正寫吧