sakura310

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7 [$ N+ }" d. H3 R2008-01-18 00:25:24 | 阿感 | 2
/ s6 I. T8 o" ]- u2008-01-18 00:24:20 | playbr2 | 2% A+ F* g3 J9 z1 Y+ S
2008-01-18 00:22:02 | 但丁 | 20 D0 n' L+ q! u6 i9 q) P) n

* S( |! B! e  [+ Q+ s點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:4 p# |# Y( l7 w3 k
Filename: DSC01158.JPG9 B' s0 p1 A* l0 t4 t
Datetime | Downloaded by | Counts
8 D( l. _2 y# n- F! g2008-01-18 00:25:24 | 阿感 | 2
  d+ B8 [+ e2 e$ @* }2008-01-18 00:24:20 | playbr2 | 2- u& Y; U2 L8 x0 T% O7 }" i
2008-01-18 00:22:02 | 但丁 | 2
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/ O6 L5 R- b2 M$ l: X( Z3 ~' G9 m( Q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+ H  c3 L3 L% J
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:' D6 ^+ A$ q" K1 l! @1 p# V
Filename: DSC01158.JPG
( K' r/ U7 d2 h0 {0 e; wDatetime | Downloaded by | Counts/ _* \$ d+ b! L" W
2008-01-18 00:25:24 | 阿感 | 2& e& T4 ?. x" Q; P1 Z/ Q
2008-01-18 00:24:20 | playbr2 | 2' O; L$ M/ f5 h" u9 L5 q& N5 l
2008-01-18 00:22:02 | 但丁 | 2+ q7 [8 T8 W) n' H9 G
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點解大家都down兩次? XD

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快d捉我錯處6 c: Z6 L8 U+ k6 P1 C$ Q! U% u1 h
話吾定我都打錯 + - 符號
4 M/ d% T/ \" I# y7 P: p係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當: ?4 r+ m4 j/ R1 [; p4 }* S
不過,c=101n哥度(解除n係正整數的限制,只是整數)0 z. N& ~- g  j6 [4 T) z
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~)
# C" o- g) R- V- a+ s知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題, |6 B2 j* R% A/ v' D
但原先是不知答案,所以唔知有無失根: Q8 U! d0 f& f" x. L4 x6 R: d  S

: D9 B9 ~7 j5 q- Q有時見到題目都感到有點不爽1 D- K5 D- W2 A; v+ U0 C7 ^4 R% V) f! 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, c, _: x. E, e# Z
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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1 e5 Q" {  q. H* X3 e9 X2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
9 s/ L" p/ l  `# `1 \9 @9 y! C冇答案ga....: j& O7 ^5 d" j  P

+ H( W8 }" ^3 x$ J/ q2條equation solve 唔到3個unknown ga....

8 C) T) `4 H1 ^# j
5 S6 ?4 a9 O3 _" z! magree
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2 equations 2 unknows
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# b: Y5 x! Y8 }7 ~$ Tif 3 unknows there should be 3 equations 9 P, S1 g8 L1 F( F2 S
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make it simple ( M4 y0 m! r% @8 B7 m7 |2 G5 R

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a + b +c = 3
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- R3 C6 `3 R5 |$ L$ qa+b = 2
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then c is 1
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9 F7 L1 R2 R- I! ]. Y7 ba = 2 - b
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# s" y2 P) V; i* @  Oso 0 = 0 / [7 A( A6 N5 B' P1 _" R& x( y
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
4 m2 B, G6 _; j+ _9 e2 b5 L8 l冇答案ga....7 v8 B! y. n! @

: j) R& {  E9 y2條equation solve 唔到3個unknown ga....

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此言差矣~& _( x: l. E  o9 l" A( o; s2 f
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2條equation solve 唔到3個unknown ga
) C, t% g3 g; x1 H* N2 q還欠一個條件,就是3條equation都是linear independent(線性無關)的
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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* O7 I/ s0 V6 Z: N; W. |
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& L& m% u! E) Q+ Y4 n7 Y" x

4 {3 l" Y% v7 a9 S. b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~)
% P* E5 I" L. C5 e  H9 x, g9 {* c7 l例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解3 i) v/ `: i$ W; w: B: [  {2 l
有興趣就解解看
+ d  x. h6 c6 I1 U2 u& j不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:6 L, C% y% w: J

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  c8 A/ o# }! Z. W7 f, t( }. }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:6 }1 o- L7 k7 t8 w8 [  ]. o  Y
捉錯處就唔敢當
) N  [  m  }- h5 Z  E$ `- V% @- E; k3 Y不過,c=101n哥度(解...

0 |+ O- c, E' B4 v) D# B( A! O- u: 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' h3 h/ ]% Z2 n
反而適當地調節一下 , 咁會理性好多# h' f/ O: h- L( g; ^
就好似隻game 由12粒珠 加到13粒珠咁
" [# e3 I) m  z當''堂''好玩哂
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  g6 B; Z; c- P( \, {& y* Z3 b/ |p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
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) h4 I) Q, T+ z- mp.s. 求''堂''字正寫...

/ Y1 W# E  b: u+ Q7 m* G" G, S; M5 x4 j! n已是正寫吧