sakura310

Filename: DSC01158.JPG
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2008-01-18 00:25:24 | 阿感 | 28 D4 z# n1 J+ N! ?" ^  ~' l: @
2008-01-18 00:24:20 | playbr2 | 2
9 N# l% G# y3 q7 V4 h, n: a2008-01-18 00:22:02 | 但丁 | 2" W; S. C5 {2 i( B

) @* [. k7 [/ t點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:) k. |0 ^& I& G, r
Filename: DSC01158.JPG
" s: _: F5 s/ W3 S( `: U2 fDatetime | Downloaded by | Counts
2 d3 ]* y7 t& i2008-01-18 00:25:24 | 阿感 | 2
! k8 h+ N, m; T/ E4 \; k! D& M/ [1 d2008-01-18 00:24:20 | playbr2 | 24 j# C' m% ]! F# e6 X
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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1 d$ f6 G3 j, G8 z, A我第一次開睇左2秒就close 左
( N: y3 ^/ g: K% _5 X之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
( _4 d# m& v, A7 S' Y; zFilename: DSC01158.JPG
. I7 {& e9 a: G4 j! q' }, VDatetime | Downloaded by | Counts
0 [, a3 E0 ^' p. f- p/ N7 v6 J2008-01-18 00:25:24 | 阿感 | 24 R6 p* v3 n& L) c. E
2008-01-18 00:24:20 | playbr2 | 27 W* c" c' B3 |& |) E
2008-01-18 00:22:02 | 但丁 | 28 J8 z# `2 a) H% J! A. J
0 L6 W2 A+ U; u: R# {) l
點解大家都down兩次? XD

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: \3 Q8 A$ \- ~快d捉我錯處# v; q5 _2 z9 v2 F9 K' |
話吾定我都打錯 + - 符號. s( j) y( ~3 X" x9 m
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
" f4 g8 V  x! b6 h" K5 Z* u  o) ~: G不過,c=101n哥度(解除n係正整數的限制,只是整數)
" p: N7 n3 @, D( v' _- u0 c; L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~)5 \" J: ?5 R* o) r+ D3 j0 B
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題5 F; _  T% L  i' Z
但原先是不知答案,所以唔知有無失根$ g- U: C8 e4 K: G! S* s
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有時見到題目都感到有點不爽; v  X/ a  n: u+ 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
3 c! i3 V: e4 D+ [6 _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....6 \% d; D- v/ ^  K7 K: R: ?, V

1 s1 _' d5 B! w2 v4 x6 @6 s9 ~& g! _2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
5 h, [, q+ b) b冇答案ga....- i1 I+ [) m9 u+ r2 g0 J8 K5 b

1 v5 Q5 M% I! d4 H' j* }+ j2條equation solve 唔到3個unknown ga....

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9 h* N" b% w* x  |2 Y! j; B9 @# uagree ; Z: @) P$ ?" \0 |! |
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2 equations 2 unknows
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if 3 unknows there should be 3 equations ; {+ |: i3 _( x0 b6 U, d7 D

8 W) H' Z9 H5 u9 Z" E( X1 n, fmake it simple
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say # [  y7 s  n/ W
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a + b +c = 31 L: N) G3 w; V: n; A& S% P
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a+b = 2& G+ s5 ?8 L) H" x' t

* h+ k) h" I) f- |# Jthen c is 1
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, r6 O* _- B4 k; a( F$ j0 ca = 2 - b
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so 0 = 0 4 q0 A) Q8 E, o) ~- Q, `
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
0 R" U) ~" h* ?5 w6 }0 z冇答案ga....3 S2 U5 d8 [, \* y& z& i/ b1 T
+ L0 S8 x, u% r, z# B5 w7 v
2條equation solve 唔到3個unknown ga....

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; i. c2 B% r+ ?3 v* B  k. c此言差矣~  p! e& Q- X' M# E% B, D
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2條equation solve 唔到3個unknown ga
9 z# m" Z3 j+ Y2 \" u3 L& n* x4 g還欠一個條件,就是3條equation都是linear independent(線性無關)的
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; @4 N0 M& b7 R9 D簡單點說,多元一次方程就是線性方程的一個例子
& B. e, M7 h& B% O$ g( _" y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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7 _. ~" k0 G4 l- k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~)
# K' [1 J* l, @0 v例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
) Y* ?. }( ^, e; a6 [5 E/ f9 I* W- e有興趣就解解看
- G4 f" a9 K" a不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:8 o' b2 o2 ^, P! O; n* K
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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:
' [% [& m1 U$ t" N' d8 y捉錯處就唔敢當
6 S- C& M8 p% N( K& U$ q不過,c=101n哥度(解...

4 c) q6 F6 m, v* M' {

3 |6 C5 X. Y/ [! o( w/ K, Y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
$ w5 }1 v3 n$ N4 t反而適當地調節一下 , 咁會理性好多
% W% \5 a( S! _8 k就好似隻game 由12粒珠 加到13粒珠咁; o8 U3 {* J: E  \+ M
當''堂''好玩哂
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p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:% I: W% n0 Z" k% j

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( q  _# F3 l! B5 Op.s. 求''堂''字正寫...

8 ^' o7 G$ o, s, ^' P0 n已是正寫吧