sakura310

Filename: DSC01158.JPG6 i4 Y( I9 \& s$ P# }3 K2 n9 e. w- F, K
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2008-01-18 00:25:24 | 阿感 | 2
+ Q  H: T0 g2 G$ N; ?* T2008-01-18 00:24:20 | playbr2 | 2' z, V- ]: C  @7 N
2008-01-18 00:22:02 | 但丁 | 26 u( U& L$ P+ {2 a

: O( Y0 @) _* c8 n5 f/ w8 ^點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
' b4 X% O1 R1 }% G( VFilename: DSC01158.JPG
; o; A. j+ M, c3 W! Y, }; eDatetime | Downloaded by | Counts9 ?9 b( b% v( w9 P" p" [9 O
2008-01-18 00:25:24 | 阿感 | 2
3 k; l( l+ q. C/ p" j2008-01-18 00:24:20 | playbr2 | 2
  \2 m' f2 V1 O4 }1 g) e% Z2008-01-18 00:22:02 | 但丁 | 2
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# y: e; L( V( g' u, Y點解大家都down兩次? XD

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' a1 a* ]3 w! F$ T/ j1 V我第一次開睇左2秒就close 左9 |3 u. v# ]" i
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:* @- Y$ F6 ]9 N& h- S. @
Filename: DSC01158.JPG; X& ^  m- J$ G; {# p  U  C
Datetime | Downloaded by | Counts- X) L6 O4 P4 r: Q7 g( a. B, [
2008-01-18 00:25:24 | 阿感 | 2
! {% L- C7 x: i/ U+ i; q2008-01-18 00:24:20 | playbr2 | 2
  B5 {. W3 T) Z* p6 D2008-01-18 00:22:02 | 但丁 | 2
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/ }/ L# x, I1 p2 N+ V點解大家都down兩次? XD

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: o& V% E3 h& A) ~+ `$ H( E快d捉我錯處! U# f1 G6 f; k4 j' }
話吾定我都打錯 + - 符號
7 u4 q, A) V( ~4 _4 r係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當9 Z) U  Q3 }$ T. G
不過,c=101n哥度(解除n係正整數的限制,只是整數)  Q& G7 i  z# @0 S: Z7 m; e
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~)
8 y0 z* r0 F) l" V* E8 C3 u知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題7 Z9 e" B5 c/ Q3 d: e1 X! Z
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" B; W. n" C; W( m7 ], R; 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
7 K+ `% f" \! ~0 Z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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  [3 r& H9 r. R" B- W8 f4 X  G! s2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:, m( m$ g6 I  Y7 X; x# v2 y8 y& i
冇答案ga....! t! [, h" A" x& m8 C& R3 Z+ b

9 A0 r6 R. W' K% s* Q7 q2條equation solve 唔到3個unknown ga....

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2 equations 2 unknows! w# R: u3 s, K' P

# y! L  i( x4 Oif 3 unknows there should be 3 equations
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make it simple
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9 ?) `2 k3 Y" L* T7 Y; T$ [5 qsay
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a + b +c = 31 Y* Q& e5 |5 v1 E9 f' |9 Z- C2 b
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a+b = 2& u9 W% G6 |% W" C- \
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then c is 1
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4 s4 M. z0 ]) j$ Va = 2 - b , Z, Q0 S$ Y9 A  B3 L

4 ]- J% m: y2 J. `- T! F4 B, xso 0 = 0 9 R/ V& {: j0 f  g. r

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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
; K/ m) x7 ~9 |6 c4 B冇答案ga....( {$ L- C- J* a) H+ i5 @' E8 K) X
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2條equation solve 唔到3個unknown ga....

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6 `! T' D: g' X! Z此言差矣~6 c5 M4 M9 G1 g; R" s; F

+ r. q5 Q  m" {: G2條equation solve 唔到3個unknown ga: Q' o8 ^- c+ h  t+ A! [% \
還欠一個條件,就是3條equation都是linear independent(線性無關)的
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簡單點說,多元一次方程就是線性方程的一個例子
+ }1 t: h& G+ e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! c, J0 y: F& @! e
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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~)
+ f+ T+ w0 a) P. A2 H9 a例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
: b. |9 i* d5 Q$ J; {有興趣就解解看
* r4 f, a3 p  d# V  |4 `0 U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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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:
( f8 x) k7 W, @3 y( l捉錯處就唔敢當
  Q9 J  x3 W( h4 g& `不過,c=101n哥度(解...

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% H1 C9 s4 @- d1 m7 n+ c9 R8 J3 B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
) w# i% ^! a- N1 |反而適當地調節一下 , 咁會理性好多
/ Y: m0 O; v6 P( X/ x; b# D就好似隻game 由12粒珠 加到13粒珠咁$ Z' X) ^7 N0 S$ m" o' g: _
當''堂''好玩哂: `. [1 n; m' i2 C- {! @0 m2 R
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p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:" P0 z! G% T7 ~3 g4 _( r1 O" _

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: G! W, N& @+ Ip.s. 求''堂''字正寫...

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已是正寫吧