sakura310

Filename: DSC01158.JPG7 Q9 q; d; z! ~% ?* x+ E4 s, T
Datetime | Downloaded by | Counts
( r5 o: m- l( r* k/ \* N) {2008-01-18 00:25:24 | 阿感 | 2! w$ Y+ F" i6 T( C3 b6 n
2008-01-18 00:24:20 | playbr2 | 2
7 D/ S" n+ e$ [* p( s* l2008-01-18 00:22:02 | 但丁 | 2
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點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:  B% A/ H# m+ D/ p* `9 U
Filename: DSC01158.JPG8 D+ q! P& M- s& K7 p6 a0 ]
Datetime | Downloaded by | Counts8 I) L7 M1 B; Z$ P% l
2008-01-18 00:25:24 | 阿感 | 2
5 i8 J# |7 l8 V- [9 ~2008-01-18 00:24:20 | playbr2 | 2
! N( T" r# n( V$ w& N2008-01-18 00:22:02 | 但丁 | 2% b# w  l# K8 u7 e' {( v% W

7 x* C! A& N; ~點解大家都down兩次? XD

0 A# q5 x3 `' Y5 Q8 x
/ _, a. n. E6 ^* ~# {我第一次開睇左2秒就close 左9 B1 i( D# @' i. Q. _6 B! t4 ^
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
* E# F; q7 j; s( B9 DFilename: DSC01158.JPG9 ?! H1 v; W% z
Datetime | Downloaded by | Counts
9 \- R! b4 f+ ]* a0 w( e2008-01-18 00:25:24 | 阿感 | 2
0 M0 ^2 H/ b2 a2008-01-18 00:24:20 | playbr2 | 2
  a0 C; a7 h0 {1 ^9 v: s1 {0 B2008-01-18 00:22:02 | 但丁 | 2
9 o' `' Z( j  k" N. T  h$ w' a2 M! N+ A% ^5 L! P
點解大家都down兩次? XD

! ^: Z* ~8 c: D6 ^1 z6 ^: B7 Q7 D3 Y5 _
快d捉我錯處, C8 i: m* E; t* f/ J
話吾定我都打錯 + - 符號
4 L7 e1 H+ f6 ~$ F! b# V/ Q5 T. Y係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
( Q1 i5 Y, v' X2 N$ `# v6 n  }6 U  {不過,c=101n哥度(解除n係正整數的限制,只是整數)% y  F" g: A1 N" 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~)0 r9 \+ H4 {& h  _: J- u. D: w
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
- B: _4 }5 v# u但原先是不知答案,所以唔知有無失根/ }% d6 i7 S) u. h+ O
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有時見到題目都感到有點不爽% w. g8 ~. F$ _0 k3 n# b
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 s4 h1 t; C& H5 @( k
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& s: M: C5 N9 F+ r3 ?- A* [! y6 {
2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
( I1 Q9 N, M; i8 M# T2 t冇答案ga....$ Y  A6 t+ i; T7 |
; n' p8 [* t% Q& Y
2條equation solve 唔到3個unknown ga....

) z( ~, [: Q. }9 B  n9 q( ~" @8 ~3 i6 g* Z. I# N2 ]8 g
agree 9 M" f" G# j( s
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2 equations 2 unknows+ {+ v, S7 i# [- v0 D* k

& o4 \$ }3 C8 h/ A! E9 Kif 3 unknows there should be 3 equations
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make it simple & o+ P3 D; [% _* F9 B0 [
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say
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" u8 L' b4 B# E( j' oa + b +c = 32 C# c( A+ t4 Q: {2 `. J4 P

' \7 |' p: \1 _9 x1 p- Y9 xa+b = 2& e; P( ~! E5 ^4 e+ ^3 q; z
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then c is 1 9 Z0 M4 n4 d7 L" w7 F

+ r1 A6 _1 B( N9 Ka = 2 - b * T, Z% ^8 }! {5 E/ q$ ^0 l3 m3 F) Z
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so 0 = 0 6 `$ p4 x8 ^  p+ l6 t- U
% _3 o9 O4 \" x- |

sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
; K: R/ I. [! {1 Z& V冇答案ga....
+ P; x. T( q; y( f4 o+ s% X( Q9 p5 S
2條equation solve 唔到3個unknown ga....

1 E( K) w! r8 g0 Z

' X4 |+ A# V( X9 B8 u" y- T. Q此言差矣~" E" ?" M1 P$ T/ K

- h8 n& x3 N) d+ M2 q2條equation solve 唔到3個unknown ga
! }- |6 e- r5 Y& Y. D; Q" ]3 t9 X還欠一個條件,就是3條equation都是linear independent(線性無關)的
% A* r! A/ a' h9 Q; x3 u; E: L1 J4 }. {' X5 \  _. k
簡單點說,多元一次方程就是線性方程的一個例子
& g6 p+ D' n5 u5 J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
# b. a, M8 V% R0 P+ @
+ s5 o. i" ?0 N( B0 L/ ?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~)
' J9 a. o8 q: N5 g# K" o$ Q例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解* Z* K) y4 t# w+ _
有興趣就解解看
8 p6 z  p$ H' _1 H- U8 J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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+ c# i/ Y" g1 _' a9 f$ y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:
0 |% O9 Z* ~9 h3 h2 c* y$ H捉錯處就唔敢當+ S, y: M. u/ m3 N; E" l) X( E
不過,c=101n哥度(解...

8 U; O0 _" {) c8 N: O
) r: }9 u0 d& d$ j; D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6 b9 f: W2 O& K# O1 a0 h0 a
反而適當地調節一下 , 咁會理性好多
5 d/ \7 E1 F( L/ C, h2 @! |, Z3 o就好似隻game 由12粒珠 加到13粒珠咁9 q; j. t4 O' z0 ~1 G
當''堂''好玩哂3 Q, S% _6 z/ H: g( e
4 I5 K3 c( b3 p/ Q* V/ G* ?
p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:) ~& [6 k8 s, @1 L+ E
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- c  c! T4 t0 Rp.s. 求''堂''字正寫...

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已是正寫吧