sakura310

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2008-01-18 00:25:24 | 阿感 | 2
) l7 F1 Q6 e0 x$ c  {2008-01-18 00:24:20 | playbr2 | 2
( h6 w) S' ?& Y* E2008-01-18 00:22:02 | 但丁 | 2% }' e' S" A8 m8 r4 x$ E

& m6 H6 E* ]& N5 L. Q4 P點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
% q  G1 M, C& e2 `: F' `1 x% m& XFilename: DSC01158.JPG( |' W: c  s, z. A6 x, H
Datetime | Downloaded by | Counts
* \& F; Q% g1 d2 i$ b2008-01-18 00:25:24 | 阿感 | 2  ]/ a: j1 K$ b, q
2008-01-18 00:24:20 | playbr2 | 2# o) U0 O; ?) ]  q2 e+ N" k
2008-01-18 00:22:02 | 但丁 | 2# F1 R4 X8 W4 N+ @9 X

0 G' O" z% f+ J1 V點解大家都down兩次? XD

: s7 W7 _% H1 v6 v

7 k" }, ~  n7 B; F' o) Q我第一次開睇左2秒就close 左% {7 i; y% z1 |5 v5 p3 r
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:! k) S' E; Q9 U, I8 d) y' {
Filename: DSC01158.JPG4 ^! Y2 [# x4 p
Datetime | Downloaded by | Counts
$ Z, T4 \3 T1 k# b2008-01-18 00:25:24 | 阿感 | 2
1 b: A/ a$ @3 x- B: m% i: m, T2008-01-18 00:24:20 | playbr2 | 2
7 j" Y. i2 @/ c. _6 Z0 e3 s2008-01-18 00:22:02 | 但丁 | 2
& @4 F1 d/ I3 }* U) X- q
/ H6 i- E% v0 p* T( m1 K6 ^( `點解大家都down兩次? XD

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4 L" v  |4 X% A0 L7 v' T9 @快d捉我錯處0 W+ c2 I, j# r( T6 M
話吾定我都打錯 + - 符號
4 ^- ^$ a" z( @2 n5 P- ^0 x6 H係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當8 [+ \9 }4 Q1 y6 ^3 [4 c! a
不過,c=101n哥度(解除n係正整數的限制,只是整數)
+ b8 k/ d6 O9 k4 {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~)
" W- ~+ B3 V0 q' i知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題! C$ D+ P* P1 L
但原先是不知答案,所以唔知有無失根+ D& B4 m: ]" F% j! N7 Q% I

: [% F- |' G7 @. N/ e0 G  t" o有時見到題目都感到有點不爽7 B6 c7 k1 B8 X, k9 g! _: t  b
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
1 J; C. \5 u4 B- |* i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....0 R+ N& r* B* Y6 z
: M2 O9 A& B! v8 b: m" x
2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
- i: @5 ~9 ]; F9 T$ S9 @2 Q, q冇答案ga....6 P: g0 k& |3 o

4 C- O; P6 Y, t6 K" W4 f2條equation solve 唔到3個unknown ga....

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. o: O3 }* Y. P" ~/ _6 `* d) kagree
* m6 [2 h2 t8 G7 a/ A$ a- [6 E3 I4 _$ Q, T! C* b% i3 o6 w
2 equations 2 unknows) W& A7 R9 ~$ E: `( o% r, H/ i
: {  M  v2 V0 M/ i3 T$ l
if 3 unknows there should be 3 equations
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8 @. ]  h$ B7 v* v5 Y/ S: Vmake it simple
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say
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; m) ^  w) T, a- Da + b +c = 3$ F* p1 L+ K2 T) ]2 r

2 w2 K2 [8 a+ j8 ia+b = 2
  o" k+ ]9 \+ F5 F
2 u( k7 a8 ]% I: k0 Ethen c is 1 " q2 H( o4 \, O8 {1 O

$ k7 {+ `8 r3 g, M+ e$ r: D) ~1 x' ~& Fa = 2 - b . ^/ F1 ^8 z. a7 l
* R* H2 e( ]  d+ h
so 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
0 J+ g) b) c9 _. ^  R2 F7 O冇答案ga....9 y7 ]* q/ v: l( S

7 |& z# }1 Z3 S% B  c/ c2條equation solve 唔到3個unknown ga....

( a6 C' e# d% X8 W% ]# @% y$ i, N$ \8 o' g! o
此言差矣~
4 @! [+ D& W0 r
# M: W& o! t0 x+ n- u2條equation solve 唔到3個unknown ga3 @* @7 ^& w* ]) h3 A0 e6 u
還欠一個條件,就是3條equation都是linear independent(線性無關)的
0 H+ K6 Y. |0 e- ^, u" L+ k/ G4 d- K/ o& p( ~2 @
簡單點說,多元一次方程就是線性方程的一個例子- G; `5 O' B8 f; X! C7 Z
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
* }! r) n. `; r8 [, l7 A) j+ ?
1 d  p$ ]8 V. l, R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~)* o# m1 w; _1 E0 G+ v1 b" }
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
! R* F, j1 |8 Z( w有興趣就解解看0 m( D% B( x6 I; Q
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:
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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:3 x( B5 I' t$ ^7 \  u
捉錯處就唔敢當
8 v4 e& V9 n* a0 y  r' y) }! j. Y不過,c=101n哥度(解...

0 u/ h" h% f1 j% j6 d' D7 z1 i# s- T& b2 V) W7 J) Q" |- |$ |: r
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
- P' C2 m9 D$ O6 @' X5 @+ w反而適當地調節一下 , 咁會理性好多
! j% i) Q6 ]2 M" {: Y就好似隻game 由12粒珠 加到13粒珠咁, l/ m7 o7 Y/ @& 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:
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) d) I5 S6 H8 Kp.s. 求''堂''字正寫...

/ u. f4 ?3 Y2 m已是正寫吧