sakura310

Filename: DSC01158.JPG4 C" Y& d# ?5 @& q
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2008-01-18 00:25:24 | 阿感 | 2
7 a% p" N- ~8 }; o2008-01-18 00:24:20 | playbr2 | 2. M% v( x% c: `7 W( F* X# z
2008-01-18 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:
1 U5 _5 Y) L. V; l  q# eFilename: DSC01158.JPG! H  J* u. c7 n3 `
Datetime | Downloaded by | Counts4 G% v& @! \- ]6 \6 }( n
2008-01-18 00:25:24 | 阿感 | 2
* q4 B& w8 k2 z' {2008-01-18 00:24:20 | playbr2 | 2
& A1 `0 Y6 T  I1 Y* @% U6 k2008-01-18 00:22:02 | 但丁 | 2
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$ D+ s3 E  W/ p& U點解大家都down兩次? XD

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8 A9 b" V4 Q7 Q6 }我第一次開睇左2秒就close 左" y  y/ r- G9 d3 q
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
" K, t2 W. T# |* r& \Filename: DSC01158.JPG2 w2 s# |* U7 e, D- d
Datetime | Downloaded by | Counts% ~+ P' M! J/ J7 |6 n" g
2008-01-18 00:25:24 | 阿感 | 2( ^6 q8 @# d3 m
2008-01-18 00:24:20 | playbr2 | 2) d1 V: o1 T$ m$ D- e' r: d
2008-01-18 00:22:02 | 但丁 | 2
, b" e2 a' i" V; \' Y$ p/ g4 t, q  u- w- o8 C" [
點解大家都down兩次? XD

# ~: `; W8 r; x, |4 \$ s3 _0 J6 v( x6 G; Z4 o
快d捉我錯處* B" \* Z3 w( X! M- h
話吾定我都打錯 + - 符號
9 \; V! [3 q4 `/ c& Q9 P係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當: _* R1 @+ H* W' B+ N6 d$ d$ ~
不過,c=101n哥度(解除n係正整數的限制,只是整數)
2 |% h; C- k3 c+ L2 {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~)
% [" w7 v& t6 t0 `知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題5 G) q! X$ m* L
但原先是不知答案,所以唔知有無失根
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1 K8 m) j2 J, C& H. n4 D6 B! v有時見到題目都感到有點不爽
6 f, ?9 F1 Y( M7 h: ?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+ R8 v, P( [+ t
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....% }. m8 V! r( a% g8 s- v5 L/ {

$ D+ n  A  [9 }2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:9 z1 J4 {6 E% I* K
冇答案ga....8 k- T0 e( T3 e; c, f7 U
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2條equation solve 唔到3個unknown ga....

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; K' }8 [% A0 u; v9 R. D, ]agree 2 W$ R2 w( g$ A  O& |2 b$ Q- A

' O5 l  |4 z, s) d3 Y2 equations 2 unknows& |* i; _3 Y7 i  v* F! d4 u: }& g
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if 3 unknows there should be 3 equations
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8 H/ @* ?; `% b  {. Mmake it simple
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say
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a + b +c = 34 B1 b: _) g1 L- ?) W! i* n
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a+b = 24 p- m8 E& l( A
' a; ^6 j9 R  l# N+ y9 f% o4 b
then c is 1
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. i- R  ~! O% Ka = 2 - b ! r' Y0 t, [6 a0 _! m3 y5 a
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so 0 = 0 ) o" L+ o* H5 D# p8 X1 r

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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
# B2 l) M" l- m1 l冇答案ga....) M  {4 \( l3 Q. }+ P
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2條equation solve 唔到3個unknown ga....

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此言差矣~
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% d: d  T" o* ~8 \; c" f2條equation solve 唔到3個unknown ga) t! {- f9 ~* @" b6 {; z3 g5 r
還欠一個條件,就是3條equation都是linear independent(線性無關)的; ?1 K' e" T8 a) u8 n, R/ o+ R& @4 I

1 G8 ?( t9 C* ~, `% E7 e簡單點說,多元一次方程就是線性方程的一個例子9 j3 v7 d7 T2 M4 i; a3 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2 X& s5 P) l. r  K8 e4 w& q

/ w( |! m: C. o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~)
. n7 b3 J9 a" x例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
$ C9 y+ v/ d% D6 A: w! v有興趣就解解看
" D) U& b( d( S' l不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:! E* X' h: O. H# V; |$ v
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* L2 p5 [6 p7 G7 J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:
5 \4 L8 L+ w0 E捉錯處就唔敢當+ A7 V. d6 H2 k% I
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
! O; m, v8 z; ?! X0 v. B反而適當地調節一下 , 咁會理性好多
6 N( X4 p9 A6 U, m! t就好似隻game 由12粒珠 加到13粒珠咁
  w* ]3 u* J$ l4 w9 _5 P+ \+ A# Y- N當''堂''好玩哂: b* t) L3 K$ B5 ?
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p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
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# c+ ~5 A* v0 D1 X' z! z2 ]p.s. 求''堂''字正寫...

5 Y: G2 I3 h1 X" i已是正寫吧