sakura310

Filename: DSC01158.JPG, G" i- q5 w. d. ^/ E- N
Datetime | Downloaded by | Counts; n; a. a; e6 N0 @4 Z" |
2008-01-18 00:25:24 | 阿感 | 2
4 X# d9 A  O* j2008-01-18 00:24:20 | playbr2 | 2
9 Q/ O% G9 k- D1 e- e$ w9 p2008-01-18 00:22:02 | 但丁 | 2% T5 ?* Y# W) W; O! w* ?& N6 J

- R6 k) \! l  W6 x7 C7 D點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
/ R7 P7 l0 p" t, A: \$ K& r7 @/ cFilename: DSC01158.JPG
# A3 R" K# d2 B& ]! B9 }; jDatetime | Downloaded by | Counts
. f( T9 ?7 e) g6 U% x2008-01-18 00:25:24 | 阿感 | 2
6 m; g6 c: N, ]% {6 |& l* F2008-01-18 00:24:20 | playbr2 | 2
' }' l, {' t. H% M7 j2008-01-18 00:22:02 | 但丁 | 2  H* W5 O% N: j8 b7 f; N
* ^4 R( N0 }/ K8 C: |+ G0 D
點解大家都down兩次? XD

" F  G% S" c' G6 ]8 J0 e  Z
8 d7 |/ w$ s+ ]8 H( ]+ z/ _我第一次開睇左2秒就close 左2 M0 }" ]3 W0 h1 M" E
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
/ @2 V; r1 k/ a( MFilename: DSC01158.JPG. r( r* P9 f2 Z$ e/ r
Datetime | Downloaded by | Counts9 G, m- |) m9 t8 B- f6 j, B
2008-01-18 00:25:24 | 阿感 | 2
3 A. ]9 ^4 g$ M& s3 G2008-01-18 00:24:20 | playbr2 | 2
! o( y  m. h5 I2008-01-18 00:22:02 | 但丁 | 2
  \; a  G( Z! u/ N6 _4 M3 i; m* F5 a, D2 s5 j  _; k
點解大家都down兩次? XD

0 J% ]* C; m0 E& N
% p7 U0 b3 e8 m4 p* z快d捉我錯處2 |$ N2 N- _0 N  z! s. R
話吾定我都打錯 + - 符號
/ [4 o$ }: I0 ^係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當. O, Q9 O/ w6 G- S. N
不過,c=101n哥度(解除n係正整數的限制,只是整數)
2 }% }7 M) x4 X6 ~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~)
& P0 z5 G7 T: G+ i( v! Q5 K6 y知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
: Q: R$ A  _& C* U# l; N! J! f0 I2 N但原先是不知答案,所以唔知有無失根
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3 l% W, E( `* Y/ C有時見到題目都感到有點不爽8 D; Q8 a5 M8 p/ ^3 b# ?+ V
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8 z6 V# _" o. A7 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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% a, x6 U8 ~) {# j) U" e4 O0 X6 g2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
: m8 ^6 A5 k1 ~$ D冇答案ga....
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4 H4 ]5 {% K3 W0 P2條equation solve 唔到3個unknown ga....

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agree 6 ?) S4 O, S9 ~% b
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2 equations 2 unknows0 }& G0 f2 [" p$ F7 J& j
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if 3 unknows there should be 3 equations : ?$ y) F& @3 @6 o7 l

$ q2 U* W, V+ mmake it simple
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" T) c/ b& }& ]say % @* f/ a8 {% X5 t8 S# L5 S: |6 Q

5 |: A5 ?+ e1 \4 oa + b +c = 35 G6 T# u/ @- f5 L* _. H2 \% ~

( x7 _" n8 N: a- Za+b = 2
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then c is 1
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a = 2 - b
8 `$ g& D/ p+ ?/ l9 y) c9 m2 \, C8 ]) A4 c, B
so 0 = 0 9 S: U0 @+ c3 F

" J6 ~$ c. w! I* `0 `/ x+ b

sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:9 U/ u9 M% D7 O! J/ M) [  L* `+ l
冇答案ga....
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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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2條equation solve 唔到3個unknown ga* A6 S  `/ A, }+ G  v9 M
還欠一個條件,就是3條equation都是linear independent(線性無關)的5 ^1 V. Z1 q6 N

$ g. a3 U* y- z4 h' ]7 D! L簡單點說,多元一次方程就是線性方程的一個例子
' T! L# K1 j5 Y3 T% a+ l4 v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: f! b/ _5 @6 }  j: N9 M" ]

4 @* }5 u; Q2 V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~)2 Y9 o  Q! m$ e$ r
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
# ]$ o" l/ v% i7 m- K3 j2 J) ^! b有興趣就解解看$ E/ P' y) s- s4 [! @) I( K
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:* q, d7 i& f/ ^& k. B

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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:1 U7 k4 f* i) I& C' }+ v/ ^8 a( }
捉錯處就唔敢當
% h7 J3 @& {) d9 ]7 w0 m3 h; q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7 X" I+ T: ]+ H
反而適當地調節一下 , 咁會理性好多/ L9 Z$ W+ R% N. u: D& e
就好似隻game 由12粒珠 加到13粒珠咁" q+ M& T) `) b
當''堂''好玩哂
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5 b6 T& i1 w0 ~# E1 R% I: Bp.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...

% {6 S# k2 m$ _) c: [0 B% }; j, p) }已是正寫吧