sakura310

Filename: DSC01158.JPG7 b$ B4 ^) w) E0 A. u; ], q) p
Datetime | Downloaded by | Counts! ?( S0 b0 S- w3 _" D0 s! e
2008-01-18 00:25:24 | 阿感 | 2$ N9 h( Z2 |1 v! D& Q9 _
2008-01-18 00:24:20 | playbr2 | 2
1 c9 Q2 u& P( J! P2008-01-18 00:22:02 | 但丁 | 2
6 _. ~) q7 s& D) \: \" l. v- U  T: ?. f) ?
點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:  D0 Z- u% \7 [" f
Filename: DSC01158.JPG/ P; _' L: J0 k, l* u
Datetime | Downloaded by | Counts' `% ^0 j8 x  k
2008-01-18 00:25:24 | 阿感 | 2
7 ?  a; I- L% D! d. q+ n  t2008-01-18 00:24:20 | playbr2 | 2% k9 Y- V6 d( U5 O( q  x8 N* \
2008-01-18 00:22:02 | 但丁 | 2, K7 N" R" \+ l9 r. e' z- e6 ~

" N# b/ w4 f' f7 ~' B% I點解大家都down兩次? XD

# F  i7 q8 ]8 j! b8 ]+ e- l: n, _2 z* _0 L, Y/ C: f4 d+ G* Q
我第一次開睇左2秒就close 左1 |- [/ `4 y2 U' E# ^* U
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:( E1 O% ~1 W" y; m, \& N1 F
Filename: DSC01158.JPG( g1 H' u$ R' D: e8 E& Z* z
Datetime | Downloaded by | Counts8 A$ A0 u2 y: N# t6 b( x7 I
2008-01-18 00:25:24 | 阿感 | 23 \3 S; b4 X; e% R7 ^% [  Z
2008-01-18 00:24:20 | playbr2 | 2
) U0 S% z2 f- S5 \2008-01-18 00:22:02 | 但丁 | 2
" J2 q+ M1 W) X3 H0 v6 g4 _8 |7 ]1 `. O. |
點解大家都down兩次? XD

6 ]: Y; h4 b1 U' `5 s9 `% ]! u' h

; e  F8 O. ^. R. Y1 B0 i1 u' R4 X快d捉我錯處
1 R2 X7 Y- m  g話吾定我都打錯 + - 符號/ V9 a) F  f- a
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
- g5 x: L1 R$ B* \- \$ }; S不過,c=101n哥度(解除n係正整數的限制,只是整數)
  Q. @8 c" Q4 g# a+ S9 |& [* J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, @1 S$ H1 X9 x. w9 l, X知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題, W; t& D* g2 m/ a% B9 L8 L) F
但原先是不知答案,所以唔知有無失根
$ e4 x: d) H0 O# I" }1 a" Y9 e6 e( C. z! B
有時見到題目都感到有點不爽# l& Z6 v  X( O6 d- \+ _
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
* K) I4 P% e2 a, Y* Y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....5 S( Q5 s; x% C" v

+ b. c: y! T. {3 u2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:2 s8 \5 r( E1 k$ B: e- z
冇答案ga....2 T6 F' w3 ?% k; K" ?& C' a

+ |% H/ d3 g' n; c* g* k  C  V6 a& T2條equation solve 唔到3個unknown ga....

) T) F; K/ q' j( l) o) @
- e5 v9 g# C8 l1 _agree + R& f' C2 B# e0 `/ B' a/ i+ i; L! m

- ^1 C" p& j5 z2 e& f; ~2 equations 2 unknows: V( ]7 {3 |- d( l

9 j4 u+ i6 b6 P8 c7 Vif 3 unknows there should be 3 equations ; e+ q" O/ {) V6 K9 F# B
/ @: Q' G) }) v/ d8 b8 G) b+ y
make it simple . Y$ ?3 i6 L. K- x2 D+ L( M

& t" D- v! I, B6 Bsay 8 `% C% e9 }: ?9 x/ o7 x3 Z
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a + b +c = 39 T0 u% G- Z5 m8 @" `# X& f

- G8 t& E; D; u$ y$ I- Xa+b = 2- \5 S0 d* m* P* c

+ t8 \2 _- J/ C1 ^then c is 1
9 o5 ]4 D6 {2 ~2 _7 S" g2 |3 O. R7 U- J5 V7 ?& |& R# H
a = 2 - b 7 j- x$ Z% \; c: c  U4 C0 x
$ h. t( x  V/ |' U- c* ^! C8 n' M
so 0 = 0 9 o+ }- G3 e7 h) V3 z+ U
: p3 `; @* @4 P% y

sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:% Z0 @$ A, [, k8 U  }# @
冇答案ga....) i9 a) k  b- x, ^, I, \

5 |8 Z2 S2 u- i, C" {2 {2 e2條equation solve 唔到3個unknown ga....

& {6 d3 t* \3 E5 I. |! s# k! _, f: }. C+ `2 h
此言差矣~
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2條equation solve 唔到3個unknown ga
. O9 c: a4 _7 j9 v& N) \還欠一個條件,就是3條equation都是linear independent(線性無關)的
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簡單點說,多元一次方程就是線性方程的一個例子2 T: ]% N; }. u
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
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! ?1 ]9 p1 \% g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~)2 N# N5 W6 u# C! c7 d
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解( h! M# l' d! ~8 D
有興趣就解解看
. W1 h) h* C; f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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& q6 |$ U9 W( j& M* O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:
' r4 C# p/ Y0 e2 T! c; X捉錯處就唔敢當
6 q' n/ J, \6 ^4 K; d( q4 @不過,c=101n哥度(解...

1 C! w# d+ K/ r0 N% B  L9 F3 X! k( 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* U2 g# G  u, H% o" P8 o/ I; o5 d
反而適當地調節一下 , 咁會理性好多1 X2 o7 K" Q2 E6 A9 m& r
就好似隻game 由12粒珠 加到13粒珠咁
% q, ?6 p; f8 A3 L, U, k% w當''堂''好玩哂
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$ s1 {5 u' F3 _, T; B3 E3 X9 qp.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
  G6 J3 ]& }7 p9 S6 {1 a6 e. o+ V3 |* u( l8 `. J5 p

  ?/ ]! b9 e6 R( [+ y; {p.s. 求''堂''字正寫...

$ D3 P+ e- X' G$ [已是正寫吧