sakura310

Filename: DSC01158.JPG  j- b# m- Q) z
Datetime | Downloaded by | Counts9 o3 o6 J- }2 b* G* a& Y
2008-01-18 00:25:24 | 阿感 | 2
* g" w  e7 u3 `# G+ T7 b  s+ C2008-01-18 00:24:20 | playbr2 | 2% ?$ I* w% l; s  M) k3 _) L% b
2008-01-18 00:22:02 | 但丁 | 2
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. g% D% s0 l- c3 D; A' t! _  ^& g. F點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
. v* c6 C4 h4 k. u! Z* YFilename: DSC01158.JPG
  f3 Y. n( t0 E6 Y5 ^4 |3 `Datetime | Downloaded by | Counts% h9 o) B3 ^7 @. U
2008-01-18 00:25:24 | 阿感 | 2& p1 L3 E/ ~6 j& ?. d; R$ Y
2008-01-18 00:24:20 | playbr2 | 2  s4 K0 B, w' G3 {# j
2008-01-18 00:22:02 | 但丁 | 2
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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! ^3 B) d$ M( ^1 w
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:8 X, W: }1 c: e! ]3 I
Filename: DSC01158.JPG
$ C" z( Z% ^; Z, V: r/ X7 ~Datetime | Downloaded by | Counts! ^! m6 d5 k1 U$ v4 j7 ~
2008-01-18 00:25:24 | 阿感 | 2
6 b: n. ^7 E, u: s1 e* {) @2008-01-18 00:24:20 | playbr2 | 2' `9 N1 P+ `2 F
2008-01-18 00:22:02 | 但丁 | 2
$ Z% j8 g% K, B$ e1 @+ f3 x4 e+ |% @% p" `7 R  B4 m2 `
點解大家都down兩次? XD

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9 U8 f  ?7 Z' N0 k& k0 y. ?快d捉我錯處* n! }& m* @- w6 ]
話吾定我都打錯 + - 符號
0 B/ ^( E+ |* w( h# H# g; h; c係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
! ?8 c& \2 N1 R) q. ]/ S9 K: u不過,c=101n哥度(解除n係正整數的限制,只是整數)
0 M* w& l% y; `6 A/ J. |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~)
3 R( |& f! T+ h: |$ e+ U知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題' A  o) x) t. v1 X
但原先是不知答案,所以唔知有無失根6 z' t4 G' a/ O# x6 o- F

( f  |9 I9 Z. L2 b! W, ^- k1 }有時見到題目都感到有點不爽
6 W, p, s- e& U* O  [8 R# l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) ~- M# i6 ]: 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....
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6 u, X: }0 D2 p2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:& D& ~. V  }/ w9 W3 N6 q
冇答案ga....
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  X% A6 x% Q9 Y* S1 E) L5 A+ X2條equation solve 唔到3個unknown ga....

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agree   A  k3 H; h: G8 k3 \9 U3 n( [& K
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2 equations 2 unknows2 ]% ]1 e5 ~9 ~5 I* |- j

! `6 ]& H- Y% q  Q, r) F. aif 3 unknows there should be 3 equations
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2 t% x; ~1 V( S2 ^% ~$ ^  a: P2 _make it simple ; H. ], j2 U! z' O. o, t

6 d7 J& k( _8 s4 Tsay
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a + b +c = 3
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( B3 g7 E5 E) l$ Q) |% Oa+b = 2
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then c is 1 7 A( O) q/ j1 Z# |" Q' f: g/ C; l
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a = 2 - b
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* d  s# E) Q1 H3 `5 Rso 0 = 0 / Y2 O$ Z/ H3 v( f  y, \& g" c

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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:8 z% `- g: J$ ~
冇答案ga....3 v4 q! }( P3 ]( [" g+ N8 k
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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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5 m( \! n" w) a2條equation solve 唔到3個unknown ga2 |! @* l( V/ ]% H3 }7 r  \
還欠一個條件,就是3條equation都是linear independent(線性無關)的. j, a  ^# J$ `, W
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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' M& k" t, Y8 E- l
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+ q1 d4 w7 O! Y* a
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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~)
; G. ^7 s" a1 J. v6 S  S例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解: q' U- Z/ R2 X! |3 C
有興趣就解解看
3 Z9 b% K; x- I  }8 c' `' y不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:9 ~& {! t- \0 _+ y

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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:+ ]9 I8 V6 `& A" C+ Z% |: z8 H
捉錯處就唔敢當
/ l' j0 y) ?- w1 a: Y不過,c=101n哥度(解...

' F* `1 b. w/ m  F, y, y) h

7 E. ^9 o, d; w! A- v" S& {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' S! I: n; [3 d0 z
反而適當地調節一下 , 咁會理性好多5 ~! i1 @' N; S4 [
就好似隻game 由12粒珠 加到13粒珠咁
3 Z. o1 a) f/ V  z* Z  V; ^# k3 s當''堂''好玩哂
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p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:) ]/ k" F5 [- g- t6 y
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p.s. 求''堂''字正寫...

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已是正寫吧