sakura310

Filename: DSC01158.JPG
6 d/ E) n5 l1 l& [$ @1 f3 E  o7 [: EDatetime | Downloaded by | Counts+ f' E1 y- n) ~/ ?* @- f  x, I) ]; t
2008-01-18 00:25:24 | 阿感 | 2# f! L* \  [9 o  t: X
2008-01-18 00:24:20 | playbr2 | 2
- i7 R3 b1 e3 s: l& b- m5 {2008-01-18 00:22:02 | 但丁 | 2
! \% k; f  i* _. o- E. f; o
3 [, v* e6 ~3 g7 Q. O  x$ S點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:; C- \  W' Z7 v% L$ E$ {
Filename: DSC01158.JPG
) G8 C8 A. v/ u( b& {Datetime | Downloaded by | Counts
( ]! V( j7 U. q7 |* C. r+ _6 i2008-01-18 00:25:24 | 阿感 | 2/ x( v: E( _, U* q! J. B/ E) T
2008-01-18 00:24:20 | playbr2 | 2
& C# l$ ^/ |7 b" M0 R2008-01-18 00:22:02 | 但丁 | 2
' }# W# Z! \5 ], }4 E
$ Z7 X" _0 }7 }$ W4 t5 j1 `8 E$ `+ e點解大家都down兩次? XD

1 F5 v/ A8 r8 Q7 I7 L
4 m! Q( P: D' I* [- G4 ~$ g* d' \5 u
我第一次開睇左2秒就close 左, U6 n5 E) f' a" E) V" k
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
/ L7 u" |% I! f2 G+ RFilename: DSC01158.JPG, a  o6 D' N1 ]% h# }: c) L: ?. w
Datetime | Downloaded by | Counts
5 u' b4 |3 B# q; k2008-01-18 00:25:24 | 阿感 | 2
" x, M$ ?- x7 F. P4 A4 l2008-01-18 00:24:20 | playbr2 | 2, u* }( @' S7 b: D4 V. {/ t8 N
2008-01-18 00:22:02 | 但丁 | 2  H( w# ]7 E5 L1 v! y1 ~/ v
( @$ t# |. [& m- L; x- ^: l2 N
點解大家都down兩次? XD

  z- A/ f" Y- O# m0 I' a9 c5 i. M
6 L% w0 Y) E4 I/ K0 B1 X/ ]快d捉我錯處
8 h* I2 w9 P, I" p) G4 K6 ^話吾定我都打錯 + - 符號- M) h, t4 S: p, `; @
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
$ M+ d* _  [! ?  s/ p) Q不過,c=101n哥度(解除n係正整數的限制,只是整數)' b8 R0 q# X8 P. _
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~)" e  K* `- k1 [  R0 }9 k
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題$ X+ U1 G7 m1 Y( ?# ^
但原先是不知答案,所以唔知有無失根/ a6 r' M% j( ]+ V( B
2 |/ e9 x. E  k- `$ S& A: s
有時見到題目都感到有點不爽# G! g1 U2 Q# @  B/ ~7 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 Y: v  q3 `" S% [8 o
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...." [1 y9 n, a- E' [$ g( E

& Z  v) L1 S+ C$ b. Y2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:2 B) s  K- S( @
冇答案ga....
: i7 V' [) x' W$ F% ^& |2 l* B
3 c  |. l+ M; h9 l+ ]& Z2條equation solve 唔到3個unknown ga....

# Z" u7 k' k: |. l' W7 @
6 b6 p3 d5 G& W" _; J/ O2 Z; Nagree
' d( e3 j1 Q% q: k2 J- b
7 t* [" {  }: E# ]. i' ?3 M2 equations 2 unknows
) D0 B8 g5 l0 Z7 }1 w) j6 B3 o' Z( N& [0 N+ ?
if 3 unknows there should be 3 equations
; b: Z9 {1 x+ r- I: U0 p$ G! A
8 U! X" \: n9 M& T( _make it simple
2 ?4 w* R7 ]7 P3 t1 N% e! J  Z- d6 Z
- z6 y( S  b" Isay ) E( i. n& r$ i: h1 D  j

% ?+ r( F) ?' B1 P* X6 y* ea + b +c = 3
3 _) k" ~$ l9 p2 X4 p5 {! v
$ l/ i& d  n! La+b = 2+ Q& \& o7 N& L* U& x

" ~6 ]  |5 [' |7 lthen c is 1 % K8 C' D9 I9 Z, I- s/ @
7 a) [) ?+ m2 I# f; C
a = 2 - b & z$ X4 M5 P8 f; j9 e; S3 L2 P% y

: z9 ^! X! b; K( n% h$ Yso 0 = 0 * w. V# i) k4 n7 m& f
) T- L8 w  T' w' I8 W

sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:4 A! [& u7 c& x6 _/ C9 f+ ?, A
冇答案ga....
; P0 ?; a/ F" V8 ?# v. T
4 w+ Y. i& l* f  j9 k1 o7 F7 |  {2條equation solve 唔到3個unknown ga....

4 n  W$ E  b$ V/ ^% {' O" m# ^, s* M1 _: \" h/ ?- ^$ K0 `7 [
此言差矣~0 D- k- ]% b3 u' w' k6 K. f* ^5 n
, m( U/ ], ]5 N3 p
2條equation solve 唔到3個unknown ga  q  d1 c. v: k$ S1 w5 Z
還欠一個條件,就是3條equation都是linear independent(線性無關)的
; G- M( l- G& K+ E0 Q! t% \+ I0 U$ u9 C2 Y" Y
簡單點說,多元一次方程就是線性方程的一個例子) d9 D) y; X) u. m+ {) h, _2 E. A9 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3 _7 u! b; s! E* g, |  G) Q

% [8 z% D: U, |6 W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~)
" Q' n3 S3 C4 R. {, X9 ^例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解3 r" W6 z( ^6 Y. i; h0 V7 a
有興趣就解解看2 [* e1 g/ @( B; P# |4 N- f( F
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:# b! j; D+ n+ l) H
. i. U2 l" a1 \8 w/ w0 c

2 p. B. W6 S2 e& _( A  s不懂的話就問playplay,佢會知答案

+ L% O0 d! x+ o5 v' t
5 r5 e  \/ S8 ~7 P3 d

playbr2

Originally posted by sakura310 at  06:47 AM:5 f; X/ x5 g' k% a2 e; l
捉錯處就唔敢當
1 H# Y7 B3 J2 T7 Y不過,c=101n哥度(解...

. e0 e" x# ]! W8 u' a

% N  H+ F3 C6 I, t% j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& D8 O) W  h( ?0 ~
反而適當地調節一下 , 咁會理性好多
3 y0 j# ]" s# z+ v# L0 j就好似隻game 由12粒珠 加到13粒珠咁
( V# ]/ b- Q; `+ R2 a6 ^- |/ Y當''堂''好玩哂
9 }, W0 M  v: `' w6 L4 p9 `
: n6 U- }- Y, `' x6 W- ip.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:4 K8 l% V& n3 p. o
  R- {. a9 D- [: _

1 t3 U& N/ K* {9 o! s5 U) \p.s. 求''堂''字正寫...

+ E/ V0 h2 I2 d! _' g% X6 Y7 z7 {已是正寫吧