sakura310

Filename: DSC01158.JPG
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! m; B( H" m7 P2008-01-18 00:25:24 | 阿感 | 2+ o0 L  L2 u2 @: ~7 E
2008-01-18 00:24:20 | playbr2 | 2$ R8 a( l) q/ [: X0 T
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:* L+ W$ h' h" T' Y1 d' v& O
Filename: DSC01158.JPG( j& n& g6 v3 |% n' u
Datetime | Downloaded by | Counts
( J$ `0 q- I( F2008-01-18 00:25:24 | 阿感 | 2
# K' _4 @: S/ }5 a9 u2008-01-18 00:24:20 | playbr2 | 2
! F6 ?# v) ?, V% x, y# f( Z2008-01-18 00:22:02 | 但丁 | 2
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5 M8 y7 s4 _: k& u+ x  Z% K點解大家都down兩次? XD

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+ \* e7 n3 r2 }" j) m5 ?' v  m. O
我第一次開睇左2秒就close 左
; I8 w! x! f1 r! r$ |$ q- |/ Z' h之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
* i! h. C. u% X& u  @Filename: DSC01158.JPG
7 y# J. \8 L6 W* w. I+ _3 _% aDatetime | Downloaded by | Counts
; {5 c, ]: B7 X( a9 ]2008-01-18 00:25:24 | 阿感 | 2
; U/ o- K. b' R. O2 \9 M2008-01-18 00:24:20 | playbr2 | 2
+ N6 S6 F# G/ j4 {2008-01-18 00:22:02 | 但丁 | 2
+ L1 W9 c6 |+ D. i6 H
. q; o* E( I6 t+ ]& P點解大家都down兩次? XD

3 ]' Q& H% O' ]1 L$ Q! p$ z
% W$ ?3 X: s# K6 r; j  @+ X7 v7 h( p快d捉我錯處
# _, [5 R+ e+ p8 @& C" h話吾定我都打錯 + - 符號
" r; `2 {0 s3 L! U* ^  N% q係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
8 s, v5 o  ]6 C$ N0 x不過,c=101n哥度(解除n係正整數的限制,只是整數)
) \/ o& r5 L3 _: X( y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~)
! M* |5 U' z" @# @8 s: Y2 y( }知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題7 L- g9 _# Z2 n3 T( D% m
但原先是不知答案,所以唔知有無失根7 u, x0 A; A1 P8 K! b
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有時見到題目都感到有點不爽
  q6 I5 M3 N2 s" X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 Y/ P- g: o) \: 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....
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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:
- _& V- |+ z+ v  X( _冇答案ga....
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1 {7 f  H4 @/ u* {2條equation solve 唔到3個unknown ga....

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agree % L* Z/ v8 }: Z; c5 l9 ]
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2 equations 2 unknows
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if 3 unknows there should be 3 equations & S1 L; q, E! @( R* G" F2 v2 P

& l. {: i! w8 d' _make it simple ; `$ x( K! U( M: X# H) f" u) s
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say
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a + b +c = 3- h7 w9 H9 Z7 H; I6 q3 U

8 F! Q, z3 J. u9 I, D' H" w8 ta+b = 28 j0 Z1 p1 x1 s* q( N3 C
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then c is 1   ?, [  X% B- C3 p- W3 a

5 d+ G1 z, N( U4 K/ Ia = 2 - b
" k' d. ^2 k2 x
% N1 ~  t  B- Nso 0 = 0 # ~! K+ w# ~: h; ?& W

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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:1 U) e' p6 b+ b. ?7 c- u
冇答案ga....
3 y5 Z$ e/ j3 V5 T1 g+ D+ Y1 Z; Q; t: q1 x/ m" j
2條equation solve 唔到3個unknown ga....

  ~1 u5 V7 J- r  }, P8 c

9 G" N& E# \+ d. q4 u此言差矣~' q4 X, d. `1 a. t. O/ ?% W
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2條equation solve 唔到3個unknown ga
3 g0 g' `. j5 L+ C) @: H: a( J還欠一個條件,就是3條equation都是linear independent(線性無關)的
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3 D  ~/ H$ b8 G& i+ B3 S) @6 \簡單點說,多元一次方程就是線性方程的一個例子) W4 [6 a+ v: l0 ~
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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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~)4 d, h$ l; ?$ D  X  {5 f
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
: `+ E: W, Y, @8 E; [有興趣就解解看
- L+ T, O1 z7 b# J9 `8 `5 r' c不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:  F. t9 c( b* o$ m# d% u

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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:
% A- @; f/ G- U7 V, @3 x: P( Z8 F$ O捉錯處就唔敢當& h$ M9 b. ^- ]% t
不過,c=101n哥度(解...

* o' o! T+ z2 b

. k/ Z! J* e% m2 L! 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
8 `/ H1 g: _! t* L反而適當地調節一下 , 咁會理性好多- W4 A+ ~3 V3 x* `# [& i1 b
就好似隻game 由12粒珠 加到13粒珠咁
! V- d/ V6 k; P, m5 Y4 c& @# D8 C4 I當''堂''好玩哂, t& A. c* L% u2 l" v
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p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:6 x6 Q4 @" a' M+ k/ C$ l+ d
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( W% a! g4 {8 ]$ T$ @+ Y0 \5 Vp.s. 求''堂''字正寫...

% M0 ]' b* J' x: `8 Y5 o已是正寫吧