sakura310

Filename: DSC01158.JPG
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2008-01-18 00:25:24 | 阿感 | 23 B3 D% @6 |& N, A
2008-01-18 00:24:20 | playbr2 | 2
' Z9 Y& G( O/ G5 l; q2008-01-18 00:22:02 | 但丁 | 2
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- N+ P5 X  p5 N7 j$ E) z$ w點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:& n7 J/ E% i- f0 U0 P% h9 A+ K
Filename: DSC01158.JPG
& j9 y- |2 b( \* ]8 iDatetime | Downloaded by | Counts
6 K' Y+ L5 |, d, m2008-01-18 00:25:24 | 阿感 | 2# b0 ?: N1 g' n8 w
2008-01-18 00:24:20 | playbr2 | 2/ P! z. H+ ^* D* S4 {5 c! [, C
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% X, x0 r6 o8 F
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
4 ?1 n$ e5 h' ~1 u  e/ gFilename: DSC01158.JPG
8 X3 H" z3 U$ w9 HDatetime | Downloaded by | Counts
, M! v0 L3 c/ l8 U- a2008-01-18 00:25:24 | 阿感 | 2
& i- C% M. I; z4 c1 b2008-01-18 00:24:20 | playbr2 | 2% k5 j( B- U: H( e( f. ]
2008-01-18 00:22:02 | 但丁 | 2
, b; y7 N/ r5 B! @( B3 e* p/ L( |% d9 J8 F2 o7 c' F; ~
點解大家都down兩次? XD

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快d捉我錯處  D& ^7 J  c6 d
話吾定我都打錯 + - 符號
1 a" D" H3 f. Y7 I9 Z' v/ D係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當1 O% o  ^# b# w
不過,c=101n哥度(解除n係正整數的限制,只是整數)% [! o, R  j/ R* @, M+ z- ~( f
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 p1 e7 s- K9 |7 g
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題: D' ~& o. n/ ?% t
但原先是不知答案,所以唔知有無失根; D* A) V+ K, W: T3 T
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有時見到題目都感到有點不爽
& N  M7 ]1 n& E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
& z7 C/ D: G8 X: u' ?2 x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....6 v1 W6 U2 X. n3 Y
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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. n2 i) M, X/ \$ O. o冇答案ga..../ z* q, P& l+ h- b
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2條equation solve 唔到3個unknown ga....

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agree
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2 equations 2 unknows
3 Z  p) f; S  L
) Z' m2 D" [( \  G% Sif 3 unknows there should be 3 equations
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" N$ C0 c/ S% T% H# U; Smake it simple
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$ O2 p8 ?; T: O( [! Sa + b +c = 3
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a+b = 2
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then c is 1
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. T' h. K# ~' Ka = 2 - b
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so 0 = 0 & h; |% ?5 A7 @4 {/ `0 f% y/ S
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
! G$ [6 x) P2 Z& q0 j) b+ e冇答案ga....* v; Z& @" y2 ^  U# Q$ I

- [4 j# u, B: ^( r( J2條equation solve 唔到3個unknown ga....

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此言差矣~: I! P* i  a; B9 P7 e3 z9 }7 Z9 j

1 g! A5 o0 C- s+ u2條equation solve 唔到3個unknown ga% r* l0 Z2 Q; R+ J% Q+ \5 Z8 e
還欠一個條件,就是3條equation都是linear independent(線性無關)的# W, ~. r1 k4 d; ]# }

* _8 |1 h- p0 J. Z  M簡單點說,多元一次方程就是線性方程的一個例子
2 M* ?& ^6 \) P3 i. Y% h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* a/ J" G% ~! k7 A" w0 H  l

8 h$ G' Y: Z. k- _* F6 ^3 Z( s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~)- k9 _3 h7 m( G4 j
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
# o$ J% l) x' D1 I/ N0 j: q有興趣就解解看
2 v3 h6 y) n  Q不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:' z4 y0 y& W* `' }0 j8 a
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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:
% ?4 ^/ F$ q- _8 U& S$ _" r捉錯處就唔敢當
' h1 ^- d* A9 o/ N不過,c=101n哥度(解...

8 x  v- ?# }2 z. e3 E) Q. h7 W: g2 x/ \7 C+ g+ g
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
0 R* }+ T' `4 g: q2 R反而適當地調節一下 , 咁會理性好多
; q- K  c# [, l+ Q" \! m4 v就好似隻game 由12粒珠 加到13粒珠咁
( }: c( z" c. v! S9 p" M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:
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p.s. 求''堂''字正寫...

3 k5 h7 u9 K' s9 \/ |已是正寫吧