sakura310

Filename: DSC01158.JPG
. a6 Y: R% T8 CDatetime | Downloaded by | Counts
; x& ^  ~3 y# @4 {2008-01-18 00:25:24 | 阿感 | 2, {9 s* N$ h! A
2008-01-18 00:24:20 | playbr2 | 2
/ Q2 M* v3 V. y2008-01-18 00:22:02 | 但丁 | 29 O( f% _& _0 D+ m8 p: I$ l, o
7 [* {, N% o# g, y1 {
點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
1 P3 o. K- p. ]7 p4 t6 B9 B# A$ R5 wFilename: DSC01158.JPG2 b6 G" j: h, A9 c4 g
Datetime | Downloaded by | Counts
4 O7 o' q3 m( A( V* j) z6 Q2008-01-18 00:25:24 | 阿感 | 2, P, S4 `$ a( T+ S  V7 L/ H
2008-01-18 00:24:20 | playbr2 | 2
  v7 s. \) L3 n4 S$ q5 f6 o2008-01-18 00:22:02 | 但丁 | 2
6 K0 d/ `1 K$ M* S
! a# T7 p, m: @" C! Y+ @6 @9 L點解大家都down兩次? XD

1 o1 l8 C% R: m
1 f! [& ], g" [' ]我第一次開睇左2秒就close 左  Z0 z! t* L6 c* E, O% G) C7 ^. u
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
' n, X9 ?* @6 _! KFilename: DSC01158.JPG
, u- I9 {: k4 m+ p# {  HDatetime | Downloaded by | Counts- m" l6 g0 i8 r# P2 s
2008-01-18 00:25:24 | 阿感 | 2# n' V/ M, M" U6 P* D2 Z5 H
2008-01-18 00:24:20 | playbr2 | 2
) z: j9 s) J9 d4 v. H5 \3 u! l2008-01-18 00:22:02 | 但丁 | 2( D' e% \, j( p5 R0 F4 N
! Z; A1 {, r- e5 D: Z7 R( ]. @
點解大家都down兩次? XD

5 X- u% `% k- Q1 B- C5 I: X! Y; v
快d捉我錯處
2 V' W* o/ V4 s3 F6 o* I: E# v話吾定我都打錯 + - 符號' P0 u5 N. X  _7 `5 }
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當  B8 u5 M  k- Q% b
不過,c=101n哥度(解除n係正整數的限制,只是整數)
8 H/ s( D3 O1 F$ {: k+ }6 ?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~)
* {2 j1 N% t3 l( y- C" D知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
. L9 c3 ]7 f' e- `0 J/ I1 w但原先是不知答案,所以唔知有無失根1 w# L/ Z& K5 @1 E# x% _

2 `( |  ~1 B- ~有時見到題目都感到有點不爽
: [# y! s. o% Z1 }4 e( y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
; T' a; B$ H: L) K3 k; Q/ E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....
  |: v% m4 q4 D9 [* l7 a
& i* ~5 [6 X- X1 @% r" `2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
) r1 _9 e+ R6 A, r5 R冇答案ga....$ e! U/ _4 r# M& G2 I+ g9 q8 N+ f

+ q( H8 Q. Y7 V1 Q# t/ V) ]2條equation solve 唔到3個unknown ga....

) w" _' W+ D+ X# y

+ s# I1 d, h0 b3 |7 K- X" Xagree
: @3 J. H  R& h
7 a/ x% @0 L1 B7 e/ Q2 ~9 c. [! Z2 equations 2 unknows
' ?. ]; {6 ]* X7 k% |% U$ B  w5 B, \( _  A7 ~3 Z- y" S* U
if 3 unknows there should be 3 equations ; v* j" O  |% w6 f0 d

9 D4 W7 g" D3 e' u- \' `make it simple
9 `$ m8 `0 P# j
8 K  ?& H$ r# ksay
% Y* T9 t3 F3 m+ E( p9 a. p& L- ~5 W" b4 X, i: h
a + b +c = 3" @0 ~' _- n/ a) g- ^

; e' c, L! i5 N. H: k3 ua+b = 2
- g& N, U& g/ K& {6 ~7 F% K* x  b6 j" J) |# F& R2 P
then c is 1 0 g4 f5 J6 e. V& Q1 ?$ P

) m3 Q2 O2 w$ q( oa = 2 - b 8 z* S% `8 A0 J) v  U7 w3 i- [, q& M
- _5 K3 Q  j! \7 R" `0 O* K4 ]+ K
so 0 = 0
4 z0 ?4 M" P7 M& u7 Y) l6 P- i( [% v! }

sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:: l; w: s* T( y3 j3 o% B& n0 w
冇答案ga....
( c5 J1 P. z/ K/ E
5 l6 |, ^8 f: v/ H, w/ t2條equation solve 唔到3個unknown ga....

& M4 w; W6 i# E0 ?) B. E/ j
# m. m% F: y! P% F
此言差矣~
0 y) H# T1 i" Y! C* ?2 r
+ s) z& b% n9 P. e4 N1 _. }! x: a( }% D2條equation solve 唔到3個unknown ga, x2 y# i# @  N* n  `+ ?7 m
還欠一個條件,就是3條equation都是linear independent(線性無關)的5 _7 J1 c7 b. d0 G- @

0 T9 A; }4 J/ v5 N8 C' r, D4 V5 k5 I簡單點說,多元一次方程就是線性方程的一個例子
" n- ^. k; C% W. 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
! h6 j' u/ M4 ?* m) ^% j# U% ^$ G* i
. G* y2 d2 g8 u/ n4 X! T) w0 {& n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~)
, ?' R( N# I* H( {  _例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解) Y: ~1 b: S) _' w; U( o7 T9 l; b
有興趣就解解看( O5 m$ d# X* c" W( B$ P( F
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:: ^* A" u+ }9 m
4 H9 d/ O- i$ o9 j

. Z9 F% e7 ?3 H+ m5 e& E不懂的話就問playplay,佢會知答案

' \2 d& f" B' z) A
8 r) K) ]8 o9 v& y

playbr2

Originally posted by sakura310 at  06:47 AM:+ k( l4 @/ H, ]9 \, j8 ^
捉錯處就唔敢當
9 o0 c% H4 Z1 |2 q% F5 }不過,c=101n哥度(解...

+ P' G! i6 h9 z" q% L8 b
0 j0 x+ N9 X. @" V2 Z5 n# `, O6 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2 p: U. a4 v/ X; Y9 F
反而適當地調節一下 , 咁會理性好多
. g  Y8 N; c0 U$ u% @# c* q就好似隻game 由12粒珠 加到13粒珠咁) \3 Q/ T+ l" E$ T+ Z- y
當''堂''好玩哂' P1 c6 Q3 |2 C& G/ o# F

7 i+ Y: |- Q' B+ B" D7 ep.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:0 t* L6 I5 t, Y) S# v$ _" l
3 l3 c$ Y/ d  }' Y- Z

; I1 V8 M9 q6 h2 u+ S: }2 g8 Np.s. 求''堂''字正寫...

/ t6 X/ z( d2 A& `6 n已是正寫吧