sakura310

Filename: DSC01158.JPG
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2008-01-18 00:25:24 | 阿感 | 26 ?' z& F) i% Y; n; k( d( n9 ]
2008-01-18 00:24:20 | playbr2 | 2
' F- n$ u/ Z. @2008-01-18 00:22:02 | 但丁 | 2' k, O4 N: S4 }3 B- J$ c/ W; x
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點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:/ O9 _# a* k" K* M! e( i7 [$ I$ c
Filename: DSC01158.JPG. X" v" p2 @# k: r/ l
Datetime | Downloaded by | Counts" [- j3 |. A5 O2 Y$ u4 X7 k
2008-01-18 00:25:24 | 阿感 | 2
& o- v* k9 ^  w  H  [/ P2008-01-18 00:24:20 | playbr2 | 2
+ F' {" w, n0 R6 I2008-01-18 00:22:02 | 但丁 | 22 P6 ?( k- m; X. a& o5 L0 C

7 [. i. I4 u' M# P! b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& _- m- r/ O  J$ Y. J
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:) W, X: S' o6 U, E
Filename: DSC01158.JPG0 ]4 C7 u: F9 @* L2 S3 q
Datetime | Downloaded by | Counts
1 O! |+ i5 \( v* e8 U$ O6 u4 `2008-01-18 00:25:24 | 阿感 | 2
7 `; F2 y* f5 T4 ?8 c& p2008-01-18 00:24:20 | playbr2 | 2
; Y3 P4 o. A% l' N# ?* J! l* h9 B2008-01-18 00:22:02 | 但丁 | 2: q, n  t. V/ a# D; f
. w% B/ r4 ]: k
點解大家都down兩次? XD

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快d捉我錯處# I, I7 i$ K$ y9 H3 j7 {. I
話吾定我都打錯 + - 符號( E) J* b( S0 j. F! A9 A0 H5 z, T
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
1 x% V6 i7 v: L8 S0 W( o( g( B$ M不過,c=101n哥度(解除n係正整數的限制,只是整數)
" J. z/ V/ B: U5 c) y$ P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~)+ k- w) N" ^8 e0 f0 H& K* G
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
5 c5 ?; S( I4 Z% s. p但原先是不知答案,所以唔知有無失根5 X8 _$ P9 ~( I$ n

3 P) A2 [; b" E6 ]- i, r: P有時見到題目都感到有點不爽5 ^8 C( x& ?, B! c
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0 _( s. C  S' S& b
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....
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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; b% F! H) o$ [6 ^: x9 ]
冇答案ga..... d- j* \* a( {6 v

. S% T) F: ~8 V5 S2條equation solve 唔到3個unknown ga....

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( O# ?: s, L  V* c* pagree
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2 equations 2 unknows
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if 3 unknows there should be 3 equations 9 v1 q) l# w- l2 S/ Z9 j, }
$ z2 [4 n% F: `1 b
make it simple 3 f" B$ s$ z: l- ^% o/ r  c: |

7 C) {3 w4 M0 X% fsay - r" b  X1 r3 [5 k# C

6 C( Z% v3 q3 m/ Y7 r3 k( y' Ba + b +c = 3* ~0 u9 }. k  M& Q9 l+ f& s
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a+b = 2  x' _) m3 x* t& J
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then c is 1 ' ^8 _5 t+ x+ c! G7 I

# h6 A0 M& b6 @a = 2 - b + \& _0 d- A) A  }  c1 }+ Z9 V$ i
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so 0 = 0 ) M9 N& l, C$ L6 r
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:" K* s! \7 ~! _4 V: J5 C
冇答案ga....
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( |4 Y. C+ n9 J8 ^5 P) X# Z2條equation solve 唔到3個unknown ga....

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3 m% a) h/ b' |此言差矣~% ]' F: l" ~/ i( g# u6 K3 V

! q: R4 L3 G% m% K2條equation solve 唔到3個unknown ga
- T- T! k, S7 q+ S/ C/ e5 D" f還欠一個條件,就是3條equation都是linear independent(線性無關)的
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, S& U' }) m" V簡單點說,多元一次方程就是線性方程的一個例子3 x# f3 R6 o1 j6 j6 H# e/ e, w# c
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- P: U9 q3 X& ?

. }4 u) K' z# j! M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~)
0 N3 n9 ~6 l1 L5 I, |( M例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解* o( Y+ I( o; T0 C
有興趣就解解看- t* N% E' W2 `! t% t; Y  c+ u
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:7 r4 ?' O9 F2 T. b' F

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7 _7 I; Q6 _5 T5 `8 O6 c6 U8 \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:+ i: E* w+ y( n
捉錯處就唔敢當
* T0 n1 n: {, _不過,c=101n哥度(解...

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5 C  M! s  {4 i( p1 ]+ `5 R  F( V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+ L6 u3 G: d& I; p3 G! \# F8 B
反而適當地調節一下 , 咁會理性好多
9 j* w& a/ m0 }5 j  K) {# E4 y+ G就好似隻game 由12粒珠 加到13粒珠咁' \6 r, {1 S) z
當''堂''好玩哂4 f5 p5 r, a, B

6 b5 M0 d8 J3 {9 m+ r  k  H7 yp.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
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8 [# l. Q) ~% D2 b# i' s% O" Q; y9 jp.s. 求''堂''字正寫...

; \6 [3 V, K5 A- ?! S5 E已是正寫吧