sakura310

Filename: DSC01158.JPG# [0 K0 J% K' m7 T$ M( l
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# r( Y0 Y0 O7 I( }2 {; a2008-01-18 00:25:24 | 阿感 | 2! B) u/ \: f0 g
2008-01-18 00:24:20 | playbr2 | 2
1 O8 i9 \; ?( g/ g% D( R2008-01-18 00:22:02 | 但丁 | 2$ ^( a' X# b  D+ \3 P3 }

; P9 J2 ~( t! ^; K' N* P點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:  e8 F& p$ m( u' ^, H
Filename: DSC01158.JPG' `9 e4 Y; j; {  a
Datetime | Downloaded by | Counts
% B: s4 ]$ ]* s& V. t5 a2008-01-18 00:25:24 | 阿感 | 2
) S- F7 M6 N9 e. C# J2008-01-18 00:24:20 | playbr2 | 2% w! t% S3 I% [' b: m( {
2008-01-18 00:22:02 | 但丁 | 2
- I  K+ ]+ t0 j  k8 c% C, D( f7 R1 `: T1 Q! |. Q; P$ i5 V. O
點解大家都down兩次? XD

! B; A. U) Z: T$ E. |4 R% _5 f% j
/ S  W1 m) w9 U我第一次開睇左2秒就close 左+ j7 A0 W2 ~" b+ R& |! W
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:/ ?+ p: C1 r: p; q' l
Filename: DSC01158.JPG
  |. ]& F1 P2 I  }, l- ]Datetime | Downloaded by | Counts
; n$ R/ V# U, q' _: Q9 k- x2008-01-18 00:25:24 | 阿感 | 2) T8 H& H+ b3 y  a6 D6 n6 y
2008-01-18 00:24:20 | playbr2 | 2
. Z* l- M; |, g: P# P2008-01-18 00:22:02 | 但丁 | 2" E) E% @- \/ r

& e) V% W7 G& R8 _- J8 G3 w點解大家都down兩次? XD

* O& A0 M2 @+ c2 j; \* ~. m$ s( h8 I8 [) L1 L, K0 M9 p
快d捉我錯處! U6 ]% o9 b* Z' y0 B: @
話吾定我都打錯 + - 符號
( c* u- v# M0 C9 e0 ^3 m% l9 r係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
' I9 d# r4 y; j' n$ g! x7 A6 Q" O7 [不過,c=101n哥度(解除n係正整數的限制,只是整數)
% I& k2 y' ^- J0 n: c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~)
) L) P0 X& B) c9 @" G知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題! G0 G) r! U( `# D: W
但原先是不知答案,所以唔知有無失根( j& p! F# `3 J; a' }/ j' h6 v' b6 f: K

) i* J, M% |7 y0 a( w' z有時見到題目都感到有點不爽
9 q% w0 c* D/ K2 Q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( n& P1 H8 A" p+ z8 v2 p. u8 M
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....# b: Z* L- X" ?# W. `% O+ \) ^
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2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
( X0 A0 A! E5 {. z9 }冇答案ga....
  E& H5 m* @6 ?/ R7 e; y+ _1 s7 |) W8 @
2條equation solve 唔到3個unknown ga....

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$ T0 ~$ y7 {( t: Bagree ( k/ p0 i) Z7 x4 n/ U7 M- R/ z
6 {/ v6 j* {6 L1 }8 P0 S& f6 k
2 equations 2 unknows! w1 l* o  h( i" t6 t) V
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if 3 unknows there should be 3 equations
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0 S# N1 e9 E; e2 Tmake it simple / G6 p3 z. n- m& n; @

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9 s! d* N) B: z$ Ia + b +c = 3
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a+b = 2$ p) Q9 m% j$ q, q1 Y3 T% x/ q
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then c is 1 ; Y2 Z- k. u  U2 z

3 Y1 f) u3 R# f  Q8 ~0 u0 H* Ga = 2 - b
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so 0 = 0 # ]5 i- b% t6 g! I  ^
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
$ ~1 Z, L; A# h4 h' _) M冇答案ga....
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' i; @5 A( N, F4 w0 m2條equation solve 唔到3個unknown ga....

1 w; X. S+ B+ `& @( d1 v7 R( ~" c2 O+ z2 H' z" ^2 b  \
此言差矣~
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) @; n5 g! W1 C2 ]2 R2條equation solve 唔到3個unknown ga
# n  f) H; g6 J; o8 v- r) U還欠一個條件,就是3條equation都是linear independent(線性無關)的
9 A! z; \& O3 i5 U( I3 }+ b) M. {8 q2 P6 r6 h+ E$ S0 E7 V% r
簡單點說,多元一次方程就是線性方程的一個例子
0 s" D- Y5 ^/ _' _; X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; b0 {1 m9 D/ t* \

" ^& [6 O- H: m, j4 s+ ?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~)6 y/ L# j( |$ z+ @, x: A; \6 L, J
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解$ I# E7 q" G; E7 d
有興趣就解解看
( g, i9 M2 B# ~* C# h* A5 l& h不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:
- c+ J4 R% J& {/ t+ k, q) d  C8 B: S' k% u( W' ]' L5 Q$ A4 u

( Y1 y" l+ O. e5 G0 X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:% n+ T" o( I2 a9 f' l$ D1 A  J
捉錯處就唔敢當
; ?1 ^( W- U/ e不過,c=101n哥度(解...

$ b3 A2 V& t, n" n* z/ q  |* ?. x; 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) K  `$ r1 z% c: J7 V' o) _- Y- {
反而適當地調節一下 , 咁會理性好多3 y0 G5 g; N) N5 V5 ~. Z
就好似隻game 由12粒珠 加到13粒珠咁
9 H$ \; j- a( U/ K+ c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:% l: m1 o0 |: e8 \( Z
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' i/ R1 D" w4 N  j& K0 Q/ s! Fp.s. 求''堂''字正寫...

$ A2 V& x/ {& _% m已是正寫吧