sakura310

Filename: DSC01158.JPG" R4 ~( s5 o0 Q$ _: f: Z: ~, z. R! Y
Datetime | Downloaded by | Counts
" w5 @/ E9 W- i2008-01-18 00:25:24 | 阿感 | 2
+ x1 H  g4 q; L- P3 B5 v4 x" G2008-01-18 00:24:20 | playbr2 | 2
( j6 }6 M( H* m" t. O3 _2 X2008-01-18 00:22:02 | 但丁 | 2
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1 r6 U; Z- V. b6 q0 P2 s) H4 v點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:) s, B' R8 K! l
Filename: DSC01158.JPG5 q# V6 W" b- x& P3 d; X/ Q: _0 l
Datetime | Downloaded by | Counts
5 Y/ _( d3 A' r; q2008-01-18 00:25:24 | 阿感 | 2
) M/ z% o! U; t4 s2008-01-18 00:24:20 | playbr2 | 2, _1 {9 \) Z0 _4 [6 |* w
2008-01-18 00:22:02 | 但丁 | 2
5 S8 ^& r( E6 n# Q5 f
( i0 w' Y  B( E! E+ D1 ~+ ^. P8 D  ]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
4 V9 @: q" G/ Q之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
: L" x7 q# Y# [: I, F8 u+ N; yFilename: DSC01158.JPG  o) V! w; }7 n  s4 w" y7 \0 u
Datetime | Downloaded by | Counts* \& ?" Y% Q% K0 b. \4 ^
2008-01-18 00:25:24 | 阿感 | 2
' \, g: _5 Q* A+ a2008-01-18 00:24:20 | playbr2 | 2$ s  R7 ]7 }! b
2008-01-18 00:22:02 | 但丁 | 2$ X8 N" y1 N0 ]# Q- E
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點解大家都down兩次? XD

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快d捉我錯處
  r9 c! a# y% t* X: S, `2 t; b話吾定我都打錯 + - 符號, u0 F- ]$ `9 a5 x7 B
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
; z$ Q; l# b0 v  b+ i不過,c=101n哥度(解除n係正整數的限制,只是整數)
1 l* K* c: G1 O8 r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 l& T/ I( r* T/ E7 N
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
3 r. W" E8 f( O* O: b+ n" b/ p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3 D. }) d/ Q* J% k+ x* }; 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4 Z8 I# ]: ^# W+ e, ^7 _
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....+ w8 y: c+ F; y0 f& J, R! L
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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:; E) }% v: P9 U/ B. n
冇答案ga....
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) O+ n0 X+ W, m, V) L2條equation solve 唔到3個unknown ga....

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agree * E* t" B3 g6 J' V( s1 q# ]

- j. j* d  C  u, o; t9 l) W. B2 equations 2 unknows
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, b# I7 [, ]1 A$ Jif 3 unknows there should be 3 equations
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. Y, t) o: |% d) D2 n, t  Y, Rmake it simple % o2 ?. ~  H) B) \) z
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say - N' G7 W2 ]2 }8 z$ _
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a + b +c = 3+ C, f7 b4 C; y
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a+b = 29 K% l$ J% B, r+ D9 c

5 C$ f8 p/ ^+ Z- Y  p8 p0 P4 ithen c is 1
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a = 2 - b
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so 0 = 0 # J* o8 q. Y3 q
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
8 q; q6 I4 b$ D9 _0 w& c/ e8 z; y, j冇答案ga....
0 b4 Z+ C$ L  q9 l0 @) C  @" j. O  w
2條equation solve 唔到3個unknown ga....

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此言差矣~
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2條equation solve 唔到3個unknown ga+ E( q; Z+ _& V9 h4 G+ d) A0 L8 y
還欠一個條件,就是3條equation都是linear independent(線性無關)的
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/ {5 _) G  D! X2 F9 n2 H: r- r簡單點說,多元一次方程就是線性方程的一個例子5 h3 J& `+ q2 e+ d
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: I" l+ U% K/ d9 ?

4 W; o+ f* R! ?7 J# W5 C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~)
1 _2 @6 F, w6 ^$ G8 z! m+ w* t例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
: F5 g& T: W0 ]; ?) M% R: [有興趣就解解看
7 _% i& j6 c* J  r; u% k" I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:
% s' m8 D0 K+ v5 `7 o. \2 R3 @捉錯處就唔敢當
/ R3 S7 \  A, i5 t& |2 n+ w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4 Q$ k6 ^% P. C$ J1 G# A: ?
反而適當地調節一下 , 咁會理性好多2 V; l9 @$ W2 y7 [# L% S7 E% G
就好似隻game 由12粒珠 加到13粒珠咁
2 p, \) e8 b( Q8 r( l, ^, F) \2 n當''堂''好玩哂& t) V# B; K9 u2 p) m& I+ i

5 o, X9 \  S# K* K% o3 p3 Xp.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
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, g' W3 C3 a/ V1 e2 T; o( ^p.s. 求''堂''字正寫...

# a) T+ x/ _2 s已是正寫吧