sakura310

Filename: DSC01158.JPG, `; z% S) t& n- R" g$ N& f
Datetime | Downloaded by | Counts7 N/ t3 p7 A6 c( u8 ?' m$ ]4 e
2008-01-18 00:25:24 | 阿感 | 2
) b. V1 j. N( g! a# {( L2008-01-18 00:24:20 | playbr2 | 2( {+ P) j$ g0 m3 H# I( f/ F  E$ t% z
2008-01-18 00:22:02 | 但丁 | 2! [2 H. ~& _$ X0 L  i
0 S* d4 D  o& C; u* X6 P) b
點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
% y* t7 q) k) Y$ F6 @8 J% C  K1 |Filename: DSC01158.JPG
" g) z+ ?5 q3 \Datetime | Downloaded by | Counts
+ p( H) i" r3 x/ V! z' T2 V2008-01-18 00:25:24 | 阿感 | 2
/ r3 ^0 O! l) A5 a2008-01-18 00:24:20 | playbr2 | 24 i/ ~/ E% A2 O8 m6 j% ~0 }
2008-01-18 00:22:02 | 但丁 | 2
1 W( S0 I( K# |$ k  \$ ]
  u0 m8 b6 ~( {1 ?8 _$ a點解大家都down兩次? XD

3 k8 i! j3 n) S
& D/ v/ h. P/ ^8 `9 b8 l我第一次開睇左2秒就close 左
# w( [( E" R. H/ N0 ]9 Q  a4 P之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:: Z0 E; p* B( t" c" }. [: R8 p
Filename: DSC01158.JPG2 z, ]: M& o& x: C
Datetime | Downloaded by | Counts
5 Z" J' Z. ?2 a2008-01-18 00:25:24 | 阿感 | 2
7 j3 d& T$ S: A, n: }2008-01-18 00:24:20 | playbr2 | 2
$ j  G& W6 |3 s( e" \9 ?2008-01-18 00:22:02 | 但丁 | 22 d) `& E: T3 r# P" H  A9 ?
1 g$ t) M3 G  [$ B
點解大家都down兩次? XD

# y; E+ Q- ^) z' K; G
9 h) {  L$ m1 C+ u
快d捉我錯處
) ~  d1 ~& U8 g+ N0 r( h0 H0 B話吾定我都打錯 + - 符號
" {4 B  y) ^1 W9 _: e' ?* m係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當' r. m* h0 u- z8 Y+ e
不過,c=101n哥度(解除n係正整數的限制,只是整數)9 Z& F. l% J5 f; \' n
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~)8 i6 n4 Y/ T- m* B3 X# ]/ n: k. J
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
' N( ?6 x1 J4 C: Z% q" _: A6 \# [但原先是不知答案,所以唔知有無失根2 O7 I7 u1 S% |! S; k, |5 |
$ u* R$ s* u' `1 @8 c
有時見到題目都感到有點不爽. X2 _5 b- l% c; X- C
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
2 q5 ~2 h: X* t: f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....+ Q8 \3 J- r8 x- e, I, [

; Z; V' b, e: h% W5 ?2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
) i* w( l4 ^7 E  }冇答案ga..../ a; i: d8 k# l# R, P9 s

/ x4 s6 Q9 K6 i2條equation solve 唔到3個unknown ga....

3 a& L$ B2 y- n5 V+ l9 o0 C

3 b- T" ?/ m3 O+ Z+ F6 |agree
. M4 T4 s; j; d! z$ s* J, O9 h( J6 p9 k4 Z1 `
2 equations 2 unknows
& }9 ~7 T% b' q$ x) h. y' }% X. S9 Y
if 3 unknows there should be 3 equations
. K. z+ [9 u9 K$ w* c, }7 f% C! X3 x
make it simple
0 D" w! X6 Q( b, [( s( b
4 A' L! ~8 Z& r+ V0 i! ?' K) ysay
% e5 B; s. k1 u0 B  ]$ ~! v- y" m( C8 O& `  l
a + b +c = 3( F: g2 u4 |* S! }+ ^/ z
8 }& Q& m, H! t
a+b = 2
) r4 H& z# w/ o8 H: f- u+ |; O9 `; x* ?
then c is 1
8 v% N5 V/ ?# P3 j" O9 e4 a  i' {1 e7 B( R- l# l# K* W! _7 x1 l- ?" d4 ]
a = 2 - b
" {4 x. v1 E( V  p7 P( G9 [# W& h/ F. j! v
so 0 = 0 ' }/ W  h$ y2 ]% E' U2 F$ x  P1 R
' J- J, m7 R+ t# ?- R' b3 K6 s

sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:/ g& j7 q: Z' b; q
冇答案ga....
  V0 T9 z7 q, n; @1 u1 \. _
* G- Y: W+ U+ B2 I) k2條equation solve 唔到3個unknown ga....

+ D% j* D9 n' g2 i2 e+ Y6 ~' ^

6 L3 W& _) l1 k/ C' F& n" V此言差矣~
2 G" D% r. K& R+ L
+ a7 r1 X) u: j; F) u& ?2條equation solve 唔到3個unknown ga2 z1 h6 P( F; n( y9 g6 M9 y+ ~
還欠一個條件,就是3條equation都是linear independent(線性無關)的+ x  t. v7 u8 w7 B4 ^% K* C* f
3 s) t7 C0 Y. ]1 q  R0 o
簡單點說,多元一次方程就是線性方程的一個例子6 {: I8 y4 p7 Z0 k
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
* k) A. S1 M$ Y" p0 p4 J
' U' g' _4 y) X* Q8 R- c1 Z: 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~)- \; v  q- s1 q: T( I& ~
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
9 y4 B8 o  T. F. @有興趣就解解看& [5 g6 {& `4 F  \; R; s  J6 B
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:# Y# O5 F2 w* d; r( E5 c

* b- L* n2 G; Y
. J# O* j+ y' S7 T2 E8 i. F+ t不懂的話就問playplay,佢會知答案

) X& O; U% r6 r% B; w1 P  d; e* I! A1 C* ], y

playbr2

Originally posted by sakura310 at  06:47 AM:6 v8 `. e/ k9 r0 @
捉錯處就唔敢當9 U3 \8 k' U; J3 U0 d6 E6 R: ?6 N$ u: t
不過,c=101n哥度(解...

, q( T# p9 j; e4 w/ k; T
& J) `3 ^' L2 P( V5 ]9 Q2 v, t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 q/ p  z. y9 _1 ^) M
反而適當地調節一下 , 咁會理性好多" _$ `9 n* J) {: [
就好似隻game 由12粒珠 加到13粒珠咁8 ?9 o9 O4 J1 B; ^
當''堂''好玩哂3 o4 e0 H1 E: y" H2 [' B6 g9 A

& b* ]% i: H8 V% \p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
* |- P/ x5 N+ _( L& A) r% m2 `; g* U' ~1 z+ v4 L1 c
; Y( h1 h/ m4 m/ c# Z9 r
p.s. 求''堂''字正寫...

. y' Q& s: `6 K# C; s0 ?, B9 K已是正寫吧