sakura310

Filename: DSC01158.JPG
1 K( ?& o! ^$ u/ F" A4 D5 ?Datetime | Downloaded by | Counts
- [; `9 |8 x" y5 J: e( e! |, o1 p' c2008-01-18 00:25:24 | 阿感 | 2: h- v5 b% Y5 i5 e7 {. Y/ _8 X8 r! m
2008-01-18 00:24:20 | playbr2 | 2
; M) g9 v6 p9 f2008-01-18 00:22:02 | 但丁 | 2  V4 S, M4 X+ t: h6 `% g- S
3 ^7 k  ~" O+ L8 L7 ?1 w
點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:2 X: f" g+ I; W+ T+ p
Filename: DSC01158.JPG
' h7 G1 s9 o8 [! _! N: b7 }% F5 `Datetime | Downloaded by | Counts% S# `: g& t, f: u+ B: C
2008-01-18 00:25:24 | 阿感 | 2- `9 a; ~0 D' Q
2008-01-18 00:24:20 | playbr2 | 2
6 k, J$ S) q7 x. \0 w2008-01-18 00:22:02 | 但丁 | 2
  ^' a, M& N; o! ~) m& |0 M0 ]' b8 G0 Q7 z
點解大家都down兩次? XD

. \! s1 N  N' U) _" B. a) T6 ^0 j3 P8 c2 X  X2 P
我第一次開睇左2秒就close 左6 F/ Y6 p% x9 k& T+ v8 e. S4 d
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:$ R. \* L) }) Q* P9 ]( p4 t
Filename: DSC01158.JPG
) d3 ?8 v- X# Y3 v+ r3 [Datetime | Downloaded by | Counts6 ~. G# g) b0 W1 N) k  Q; {) f
2008-01-18 00:25:24 | 阿感 | 2, n6 `/ R2 ~3 o1 T4 f2 y: U- A$ \
2008-01-18 00:24:20 | playbr2 | 2
* j! Y: S! M- n- K% `2008-01-18 00:22:02 | 但丁 | 2
+ e) E- H, Q/ g
% f9 Z% [2 j3 Z. t' }) o點解大家都down兩次? XD

* T0 p' k1 K# s2 s
3 ]9 [' [3 S7 n) a1 `0 u# \快d捉我錯處
% c1 l' Z$ |5 g: y話吾定我都打錯 + - 符號
9 ]4 X8 s7 G8 \0 S係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當% b9 {/ {) H! ^' B8 O: A9 V/ Q
不過,c=101n哥度(解除n係正整數的限制,只是整數)1 x+ Z/ z4 N8 ?& d2 v
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~)3 ]5 o, L( A& Q& d0 K
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
- M3 J9 v) \1 d- x) }& E- Z但原先是不知答案,所以唔知有無失根7 f$ Y/ e$ z; m$ _0 l6 E& Z% q

; R7 h, \, x- i5 q有時見到題目都感到有點不爽# Z/ [4 r0 d: 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2 G3 L# {* D/ ?+ K: j
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....7 V, [; h3 {3 M" U. z2 H+ F9 k

% l' E* p% N0 Y; i2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
& b. N5 }8 p+ y3 j# k' h' H$ h. z; E冇答案ga...., b& J4 z/ {5 I, y: q

. F$ I+ K3 V/ U. o( W: D2條equation solve 唔到3個unknown ga....

; y+ l+ E$ r4 ?" g0 ~) b7 m. ?
agree
( I; ^3 Q7 G2 B8 \) p; k+ X3 ?5 A$ V1 J3 {3 y7 x- A8 B
2 equations 2 unknows
- s! p8 d9 S! l, I2 Z! @
! c1 l+ ^( I$ {7 y" Hif 3 unknows there should be 3 equations
# Q# R' A; c  a, w0 ^* A# o: \5 W! W1 \: m
make it simple
8 l1 @( N& w8 Z) O' n' f5 @; k  w
say . h3 m7 m+ b* Q( o' ?0 S9 e
) s) K$ M* M" R( j6 K/ D% g9 Q
a + b +c = 3: y$ d9 P/ k+ Q3 I# c% s( W4 }
" m/ n& h5 @7 u/ o: E
a+b = 23 \  j" Y$ _' x
8 f( b4 o$ d% `! c4 o
then c is 1 2 [+ G! v. x+ g% |4 o3 U! V4 V
+ D! l( r4 p( v" d5 w4 g
a = 2 - b & t- x* L0 [# ]4 ]& t
8 |/ a; d$ {/ x7 }8 }
so 0 = 0 0 c; \. P7 ^6 ?  t  z7 s

& H. [# y- }% c3 M* P* f" }) u7 H

sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:1 Y7 d3 t7 T" [. ^0 G& x
冇答案ga....* D& @# q8 n$ _( S2 [
. j0 Z$ ?* C+ |2 ]: f3 y
2條equation solve 唔到3個unknown ga....

. x% ^3 n8 Q  d' w1 ]  n
; l8 Z$ p. z* m/ w4 D- ~3 s2 t
此言差矣~0 T' [0 `5 o7 W; N% f' V

- c) }, V/ ~& P9 `! G( y2條equation solve 唔到3個unknown ga' K8 K9 C0 k- W
還欠一個條件,就是3條equation都是linear independent(線性無關)的7 G0 c2 c  e4 [( x* `5 p

/ K: w6 F3 d( c/ n+ F* v簡單點說,多元一次方程就是線性方程的一個例子1 y5 H8 q: @  ~, U$ i
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
- _( ?" F0 G' T1 Y
! ?- b4 F$ {7 c, `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~)' _# W- ?. N7 b$ @$ e- [
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
7 i  _% A& @5 J3 X有興趣就解解看
! u4 h* f6 F" e0 j- S0 ]不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:
' C. e! F" I9 T+ y3 P7 Y& Y' e
8 s2 _; ~- S* A( c! ^
+ B: b7 u0 Z( E6 b% l: d' ~不懂的話就問playplay,佢會知答案

# K/ n& k$ x6 J$ y& z( D3 ?4 ^* E
1 i1 t0 H" x- G

playbr2

Originally posted by sakura310 at  06:47 AM:/ Z5 D8 A+ _8 h
捉錯處就唔敢當
9 C6 H1 _8 u8 E1 ~$ W不過,c=101n哥度(解...

# H- O; F6 h+ `( ^8 A1 Q

$ r  C$ j) \: T; j( e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, w1 e& d$ e8 T- u# ~; q# J
反而適當地調節一下 , 咁會理性好多
: q- g  t! _6 f. c+ ]就好似隻game 由12粒珠 加到13粒珠咁2 O# j) l1 |+ i. v
當''堂''好玩哂, z& k  f, l# P, n' _
) u& `4 q8 _0 r. i! `- s
p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:. X% r! p/ P1 Q9 {

# o  t2 x5 ]! g3 u& [1 f9 P* d8 x4 H% I6 D1 z1 s/ }: Y( ~
p.s. 求''堂''字正寫...

5 C* }6 r3 r7 |; b7 }% _1 T' t已是正寫吧