sakura310

Filename: DSC01158.JPG5 I. ]) p2 l; O, e( a( e3 M5 d3 z
Datetime | Downloaded by | Counts
9 ~! n, a% [3 w4 `2008-01-18 00:25:24 | 阿感 | 2
; e$ e9 P3 `6 R, G8 G4 w( Z2 A2008-01-18 00:24:20 | playbr2 | 2
2 }. B9 t- x2 d, g2008-01-18 00:22:02 | 但丁 | 2
8 V; \- ~* O- [) v1 S* K/ b! ~# y4 a4 S
點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
' h  g" N" B/ z% M- LFilename: DSC01158.JPG
* v  P% w: ]; M1 y: F1 JDatetime | Downloaded by | Counts
3 y( R9 n4 [1 D& K9 d, d" @2008-01-18 00:25:24 | 阿感 | 22 Y  x5 [2 r3 r! j$ t; q
2008-01-18 00:24:20 | playbr2 | 2
, K# w; c; r7 k0 k7 b2008-01-18 00:22:02 | 但丁 | 2) L# @5 H$ q( \+ g

5 }' x4 t2 E3 Q; U8 ?點解大家都down兩次? XD

# ]6 y+ `/ s+ ^( d8 W' _5 l) Y4 J/ p  I

( Q$ s& I4 ^% b* k; [" F我第一次開睇左2秒就close 左) e9 B% y% p2 h9 Z8 n# S$ j" Q
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:9 b! M5 \- e' r' Z2 N
Filename: DSC01158.JPG% Z$ n8 N4 N' f$ B* H/ j& m! P( c
Datetime | Downloaded by | Counts
- C. J. l* x; E5 M, s6 A& q# W9 Y$ b2008-01-18 00:25:24 | 阿感 | 2
' e& m2 J3 P+ @" {1 l2008-01-18 00:24:20 | playbr2 | 2; B1 m3 }5 g. e2 F& ?
2008-01-18 00:22:02 | 但丁 | 2
" a. l" [6 L& H  N* h3 l9 ^/ F5 |
2 z0 J: A5 D2 Q: B3 `點解大家都down兩次? XD

/ x. n* }, I' A6 i: n

! T- b( j0 T  K" J4 z1 {快d捉我錯處7 l1 U+ O4 j. j6 c* u3 d" _
話吾定我都打錯 + - 符號
/ p) h  F( A! g$ l) w係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
( W+ }* k9 Z; q% `3 ?# k: H) z不過,c=101n哥度(解除n係正整數的限制,只是整數)5 S0 R( u8 q! 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~)/ F) _+ n- P8 f( k% w% q  t+ g2 T4 r
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
5 y. V: H9 }% Q$ U. Q( X2 |+ i但原先是不知答案,所以唔知有無失根/ i( B$ q8 ], s( L/ t1 D

8 C4 M1 r) V& L- ]有時見到題目都感到有點不爽
6 E0 d9 o$ ]) c$ v$ N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
" }' ~3 q! _: W2 {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....
8 c8 O; `8 w7 ?0 o( T- i7 h
$ [4 |; q/ Q4 a1 y  w& a2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
/ {5 Z& y7 a3 W冇答案ga....0 _5 A% l" M! r3 `% K
2 s/ U0 s) }$ V1 M
2條equation solve 唔到3個unknown ga....

3 n3 b+ U2 n! H% h
. G% X6 q8 C: y6 |$ x6 n4 g
agree - b; @4 \7 X  o" Y
3 |4 o- c6 l/ U0 l6 h- L
2 equations 2 unknows- W" o! z3 t- H/ q' I' ~
' l: s8 C+ q) E2 L
if 3 unknows there should be 3 equations
% b; _( Z& N! B2 S* W/ N5 k1 ?0 I) I, R& D* K. N+ g8 n* f
make it simple 5 b! q# K! I4 u  Q0 S" P* N
  ?" A8 j# W5 C" {
say
1 J4 \5 X3 a$ q# C9 C, T5 c7 {
. y& u- B# u. Z( E! |: D: i& Wa + b +c = 3
, F7 U3 x1 O8 s; ?* t% {2 d+ N( Q
a+b = 2/ |8 e" _) w3 f% z) F& b! v" v3 ]

! @2 P( K3 Z# O. Y% @+ z# [then c is 1 : C2 Q; D' d; u- j6 D& W/ ?
# F/ G$ `! c. U4 v4 k$ X' r9 @7 L
a = 2 - b 4 s" z' J2 g- v) @1 k7 q
8 m/ Z- U/ _$ L" L" G- ]" f
so 0 = 0 ) }5 i5 Z+ [! @( ^; p+ E- L7 O
1 A& [) ~% T. r& ~

sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:3 k& A0 i( @3 L6 F: h
冇答案ga....' n9 M3 `; j7 G8 z; F. S
6 v) D; `8 L- ?: F' H
2條equation solve 唔到3個unknown ga....

" l6 t% X5 N6 R/ @! _
# |- g/ m9 c6 r+ @: G# I7 n" L
此言差矣~
2 [: k9 r6 W/ Z& m4 W! x# u' M
- N$ V% l) v" o4 q' Z$ u7 E2條equation solve 唔到3個unknown ga
. b6 B& m. Q) u$ D2 o還欠一個條件,就是3條equation都是linear independent(線性無關)的
- ~8 l2 {; |" k$ z1 c; p- O$ l
8 [, G; k' l+ F3 M8 |. U+ F簡單點說,多元一次方程就是線性方程的一個例子% @0 L0 {6 z3 X
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% [8 e6 l+ M  S
; B% Q% i4 a/ W* M: p6 k
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~)6 g: m" W' U" v' f$ }8 c
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解) `- u* A6 q" r$ U
有興趣就解解看
/ h% p* D3 e* _- g9 t- m' w不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:6 C5 P/ G. I2 r$ z5 l+ _) a# |+ H
$ `0 ~2 y: z+ `9 P+ h9 T: r
8 X  r- F( E! e) z; `- r
不懂的話就問playplay,佢會知答案

) T0 F6 J/ M* p9 L. E

% E  E* Y+ y6 j! u) I

playbr2

Originally posted by sakura310 at  06:47 AM:
5 c# C2 `, @/ F$ z; E捉錯處就唔敢當
! b  N9 a3 Y, H+ i2 S6 _' e# ^不過,c=101n哥度(解...

; E: O( |+ Q6 r* w
3 T  E! }9 ^: F. p2 m, I
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
+ o$ d/ _5 s# Q. V# y1 c9 J反而適當地調節一下 , 咁會理性好多
4 T; s: C( S% F1 v* \* s9 o* p2 i- s就好似隻game 由12粒珠 加到13粒珠咁( S; A: B$ K6 n+ _9 @: A
當''堂''好玩哂
- P' q" d3 p8 D& s- V, E" x
2 [% E( Q2 y  G9 Z$ q( R; v' ep.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:1 t+ f  i) z/ l3 e) S3 j6 B2 [

/ q/ x- e7 t7 X; }# B& x* @( [1 b- n/ `' X7 ~6 ?/ Q
p.s. 求''堂''字正寫...

2 o' l# o5 Z2 I: s: b
已是正寫吧