sakura310

Filename: DSC01158.JPG
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: O1 w; |5 m5 v" }: a! e2 g# x2008-01-18 00:25:24 | 阿感 | 2+ q8 v2 Y7 B/ w4 z7 ~
2008-01-18 00:24:20 | playbr2 | 2
! B% j. H  n' p/ p6 b: t: @( ]7 y2008-01-18 00:22:02 | 但丁 | 2& u, L3 m+ k; }9 H3 p
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點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
, q7 [& E3 V: T2 @- f; l/ \Filename: DSC01158.JPG; O/ @  \0 m1 e# \! r$ H: i
Datetime | Downloaded by | Counts/ t" h0 {$ B0 U* v, N
2008-01-18 00:25:24 | 阿感 | 2
2 p4 J/ v( l7 \, D, A. M7 c. o0 V" Y- x4 q2008-01-18 00:24:20 | playbr2 | 2
, ~) m# A% d' ^$ R  l  ?3 }4 A2008-01-18 00:22:02 | 但丁 | 2( w  @' z9 Y4 M& N" C7 A

3 }6 y7 E/ j) f) {點解大家都down兩次? XD

$ M% O3 W+ l+ e  m9 |+ m
, o. C8 Y. Q  k5 _+ C我第一次開睇左2秒就close 左0 Y$ [! @& c) u, d, ^
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:2 S' z8 G1 [3 b' [2 j" H
Filename: DSC01158.JPG
" u0 W! A- l; \) N" S5 h" DDatetime | Downloaded by | Counts% O" B3 a) u3 C0 n8 B$ y
2008-01-18 00:25:24 | 阿感 | 2
9 \- m5 C; h  \5 L7 D; P2008-01-18 00:24:20 | playbr2 | 2
! K6 e- o4 L/ D6 R! d2008-01-18 00:22:02 | 但丁 | 2
. ?# X0 Y  y2 C& K7 X
% ~. n, [1 d& Q點解大家都down兩次? XD

) _/ r8 H, E/ x" S$ ]2 Q: z( Z5 J/ y% l
快d捉我錯處6 g. C9 a& W! [4 Y3 e
話吾定我都打錯 + - 符號4 L( ^, o3 r4 s4 ~5 _6 }. a
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當& J& j4 R3 `& v" R
不過,c=101n哥度(解除n係正整數的限制,只是整數)3 b; z2 s+ s; D% k0 G
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~): c% T) f9 c' [  ?. b
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題1 ~5 u: _# c2 r- H
但原先是不知答案,所以唔知有無失根
4 ^- ?( v+ E5 d
3 K9 G: n- v+ i/ Q$ r有時見到題目都感到有點不爽  C1 w6 k7 f5 T
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- D/ M7 L, r( W8 `
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....
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! e8 W! |" ~% ^& J2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:3 ]2 E5 ?/ ?3 W; e2 b
冇答案ga....
) D- X: ~! v5 G9 J* d5 M3 a1 |
. R9 r) _' N* n3 Z: T2條equation solve 唔到3個unknown ga....

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4 Y* `& `6 _' ^! I/ Q% K9 k, m0 S
agree + H7 \4 O) g& V2 P8 T( B/ G. n4 C
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2 equations 2 unknows
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2 |4 E/ l$ l, g0 jif 3 unknows there should be 3 equations . F7 |" Z8 Y, C* V- `
5 C- V% g, a# d; m, F% f& y6 [
make it simple / n6 w0 d" n1 T6 P6 _* x& i9 l0 h
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say $ M( v) r& z- k: y1 U. ?

! i  _: B" k; j# x2 c" p/ u! qa + b +c = 31 I: a2 r! K0 ?( ?2 @
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a+b = 2
2 @# p" Q1 Q5 S) s3 a4 U/ {3 |3 E+ \" U# H3 C3 g
then c is 1 . o- ~* J5 U8 `! ]. p; R& l& B

# [3 V+ O9 T, H$ T; I' n; sa = 2 - b ' S7 t* W. X8 N$ T& E3 |, ?8 C

; ?: ^$ A7 v* j# S( N* g, v; fso 0 = 0 # u1 l& W5 Q/ z4 X+ |9 ]( K
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
1 W. h- K/ a( K5 t9 @( W冇答案ga....& I) L5 l" N2 m6 n- [
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2條equation solve 唔到3個unknown ga....

' |  T4 n, O8 q# X/ f/ r

; n2 e  @6 W5 E9 s+ Z3 n8 L此言差矣~! c, Q  ?# Z2 P0 I* S# q
( ], U* Q6 M- }( G
2條equation solve 唔到3個unknown ga
) l2 n3 e% Y6 m1 {4 j還欠一個條件,就是3條equation都是linear independent(線性無關)的" s& G6 r8 @8 G

# S& Z) w: H! y: W/ v簡單點說,多元一次方程就是線性方程的一個例子2 Y6 w4 W% s1 V+ T& R9 V
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2 Z/ ~% d: V' T9 z& I- d
6 v/ _+ o% e& A# s8 ]( 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~)
5 m& n$ c7 R0 Y0 V/ P) J5 K例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
, `' }& C: j' ~7 ]8 U有興趣就解解看' ^* t" _, K, q
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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. _3 n  v& D0 m" G; J6 n5 k; W, `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:7 B$ G+ S. x( n) I9 O
捉錯處就唔敢當
( o0 _+ V5 Q& }不過,c=101n哥度(解...

; `! ]( }, E# H3 w9 u  X* W7 `1 c, I# V% ]/ g5 H5 h* R
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& Z' g% Z3 t& _9 L+ h
反而適當地調節一下 , 咁會理性好多( U, q- }, W6 P# f7 \( w  S
就好似隻game 由12粒珠 加到13粒珠咁1 l+ @4 m* A% D
當''堂''好玩哂
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p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
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. b' X) p4 T+ {3 d# D0 Z9 ?/ H7 d% }8 Pp.s. 求''堂''字正寫...

) o* b1 O  z, P' H, a4 F已是正寫吧