sakura310

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2008-01-18 00:25:24 | 阿感 | 2
5 }" Q  c4 n) F+ P2008-01-18 00:24:20 | playbr2 | 2
# V& Y& l6 F: M2008-01-18 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:1 D+ h: p' l7 X
Filename: DSC01158.JPG7 V5 N; A& z% ?! n2 @' `* s5 l
Datetime | Downloaded by | Counts4 F6 V& q/ B% s. ]& [9 P
2008-01-18 00:25:24 | 阿感 | 2$ e; p' U+ M: g- R
2008-01-18 00:24:20 | playbr2 | 2
; h' H9 ^9 ^+ Y5 L: F' a2008-01-18 00:22:02 | 但丁 | 2
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7 O+ j) V, E6 T點解大家都down兩次? XD

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8 B- u+ P; b0 y: D/ [我第一次開睇左2秒就close 左
; N! _+ d. f0 w, U: Q) k: R+ J# ?之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
# t9 d5 w5 ^5 F6 r' RFilename: DSC01158.JPG; Y& B/ i+ j, ~+ p- f: d- W) G
Datetime | Downloaded by | Counts
( F( E  Q2 c7 I; L2 s3 F7 d2008-01-18 00:25:24 | 阿感 | 2
, L* w4 y4 ~, ]) w2008-01-18 00:24:20 | playbr2 | 2
: F4 u4 e- K, f1 i2008-01-18 00:22:02 | 但丁 | 22 x2 L2 m- a, _& d6 z. ]- l4 l
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點解大家都down兩次? XD

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0 D0 T; b( Z4 k) K# D快d捉我錯處0 N  _7 o! \/ \2 p  l# o
話吾定我都打錯 + - 符號
) p0 x+ r5 @4 S( ^/ \( P' A; ]係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
0 U. V9 q# ~5 g9 f, H4 {不過,c=101n哥度(解除n係正整數的限制,只是整數)
  ~0 c+ t: J) J& y# 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~). q# @2 j: p2 l1 J7 y: H& ]# ~
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題9 f9 K9 q* ~0 K) @1 y
但原先是不知答案,所以唔知有無失根
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, T" Q8 R$ ]6 w2 R# ?6 w, l有時見到題目都感到有點不爽
' b( Q2 E5 `" p1 x2 W8 D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, d( U* P* w7 d+ J3 @' ]
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....- Y5 m) E% t4 J; d/ n

" L' M3 k& m2 g2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:1 o' }8 `1 c% k  Z$ W+ j
冇答案ga....
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) f" X( k. @7 F7 @4 \. }0 T# w2條equation solve 唔到3個unknown ga....

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) t$ Y6 W2 Z+ Z  j# K/ iagree
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* [) ~5 v. q( U4 `2 equations 2 unknows/ y1 V- Y1 W9 `# b
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if 3 unknows there should be 3 equations " b8 m: u! h) q8 V* J! h3 N
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make it simple - Y. }0 j  C; L5 M$ G. l
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say
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a + b +c = 3
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a+b = 2& a% y% H: Y" Y1 g
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then c is 1 # I% Z3 _! f/ @9 F% X
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a = 2 - b
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. b$ s+ Y2 D7 }$ S; l) Z% B  P3 d4 gso 0 = 0 % {- U/ k( `1 U' V/ [6 }
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
4 E% o8 @- ]+ I& p9 s# Y( k+ o冇答案ga....7 G) ]+ |+ ~) f
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2條equation solve 唔到3個unknown ga....

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此言差矣~: e' {( A" B, Q: m

% L: B7 H3 A/ Q# ^! \: V1 P+ S: n! M2條equation solve 唔到3個unknown ga
( a* h' ]" a, Y* e: b還欠一個條件,就是3條equation都是linear independent(線性無關)的
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# Z2 u3 d& Y  K# H5 `2 O- P0 S* r' z% P簡單點說,多元一次方程就是線性方程的一個例子3 o# o2 I- U. ?# t$ g
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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0 P4 o" t# C. K3 U  s8 I# \) H. O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~)
  S! F) N1 p* y7 F4 F4 y例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
2 o2 r% Z# H, d2 L有興趣就解解看) U) `- d* S9 c- y9 R
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:5 `" H  H4 c3 F& ^; j! s: m

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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 B2 o9 X* C( n: Q捉錯處就唔敢當4 r9 ?$ @6 A! e* t' Z$ q, a
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
. ~' [. k8 u( T- V1 r9 [% D. N反而適當地調節一下 , 咁會理性好多1 d- ^3 Q# y/ Y) L; `4 C: e
就好似隻game 由12粒珠 加到13粒珠咁* e0 r( W3 g1 X/ ~, ?+ ]
當''堂''好玩哂
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3 I$ `& d) w- ~: P3 Z- |p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
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& n7 B9 e, v1 R3 @8 Np.s. 求''堂''字正寫...

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已是正寫吧