sakura310

Filename: DSC01158.JPG% }5 C1 S, A& h6 U' k0 I
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- s. a& Y. q; k8 \' L: @  j$ o2008-01-18 00:25:24 | 阿感 | 2& `7 I; t9 a, r
2008-01-18 00:24:20 | playbr2 | 2
1 G1 l( {6 ^7 `% \3 q2008-01-18 00:22:02 | 但丁 | 2# t  d/ w0 u) A1 d

1 I) O3 _! n5 m6 {3 }) y點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
8 n+ n5 K+ k# G" E* X# }) uFilename: DSC01158.JPG3 s: ]2 z8 Z2 H: Q$ x6 Z
Datetime | Downloaded by | Counts
9 k# p7 ^) ^9 u% x; b9 _) t2008-01-18 00:25:24 | 阿感 | 2
. K5 A, X8 P: r7 Y4 Z2008-01-18 00:24:20 | playbr2 | 2: ~  T, x* _  i$ F: a. E) K4 v9 G
2008-01-18 00:22:02 | 但丁 | 2
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點解大家都down兩次? XD

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我第一次開睇左2秒就close 左
, l0 B( u( r' L9 b0 T' n: ?之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
: v& s# C: B2 l+ y0 Q, X* EFilename: DSC01158.JPG/ O  t- W/ o0 J- ~; i, ?- \- E
Datetime | Downloaded by | Counts
$ P, O' F0 R9 G% D! l% ~2008-01-18 00:25:24 | 阿感 | 24 W/ a1 i$ ]" r/ L  V9 Y2 \
2008-01-18 00:24:20 | playbr2 | 2
6 {0 T3 c6 g# ?& a2008-01-18 00:22:02 | 但丁 | 2
" `4 e& t' O7 L5 k  f" `1 t5 _9 |: g  P1 m, B) v8 I
點解大家都down兩次? XD

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. C! ^1 V) u: x, `8 E% X6 E; M. N; g% {快d捉我錯處' s3 x) X! C! ~! h
話吾定我都打錯 + - 符號
' y& s8 i$ F! ?& f4 J係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
: p3 p# G) n: q2 U不過,c=101n哥度(解除n係正整數的限制,只是整數)
5 \- O. ^( E5 W# u: Y: t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~)
; H( C- P6 c4 n2 G- R+ G  X% Q知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
% k7 _4 K' E) O* M0 K) Y但原先是不知答案,所以唔知有無失根- y9 A+ j+ w- W* N  \7 D
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有時見到題目都感到有點不爽# h% S* G/ a( I5 r+ H1 V- N- j0 g% x& \
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& O- I, B$ v  `+ h
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....2 R6 d3 n  U2 h6 ^5 u, `
+ ?( t, c! U& b
2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:/ [9 c: L2 K8 e
冇答案ga....
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2條equation solve 唔到3個unknown ga....

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agree ( o8 p- s9 t5 f4 m

1 H8 w0 w+ b& @" m7 w) ^2 equations 2 unknows
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if 3 unknows there should be 3 equations
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make it simple - T$ C8 ~) P9 y5 W/ I" n# y

9 k( g# ]. W, W6 M! `4 N1 Qsay
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a + b +c = 3" S9 R- A6 m& h4 m- O. Y
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a+b = 2. v9 A' [3 r3 K6 X- Y+ f, f
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then c is 1
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a = 2 - b 4 p7 w% C1 K$ ?& K5 m
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so 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:6 c, R5 P' ~- H, M3 n2 @- J
冇答案ga....
4 x, F& b" s* x( y/ e
- P" }7 y7 c; T+ c9 ?2條equation solve 唔到3個unknown ga....

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0 g5 M# U3 f  S$ i( J6 h此言差矣~
( g) Q' k' @) F& u' m% y& J
! m( i! {/ ]4 `* H: X2條equation solve 唔到3個unknown ga
# D$ a& k/ e6 S+ w還欠一個條件,就是3條equation都是linear independent(線性無關)的" W0 n" A0 ?- |

$ K7 h# o+ ^9 C, e% N簡單點說,多元一次方程就是線性方程的一個例子% H- d5 [0 f& ?; n
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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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~)
  E5 I' u" W9 x4 f) M7 Y5 Y例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
4 D8 }1 l; p+ Z4 _8 h8 f, `6 T" n有興趣就解解看
4 J" z1 l' c+ ~; w! ~' b1 y7 U% @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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. j( r3 J, @0 m5 @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:
- g; |' }+ |+ l/ u, K捉錯處就唔敢當
+ I7 d+ z6 }( o6 H4 p; J( ?+ i# Z0 U不過,c=101n哥度(解...

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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2 A& ~3 t# p  t, k0 j5 h
反而適當地調節一下 , 咁會理性好多
) V9 Z& O+ g3 {. s4 u# H( y  j就好似隻game 由12粒珠 加到13粒珠咁
2 X# |7 v8 {2 J" r$ ?; t7 _當''堂''好玩哂
' m$ ]  }5 R" h$ o8 D+ s* w+ r- e9 ^+ s/ K. _
p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:7 @% k* Q4 u- T2 J# }9 a0 a
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3 N  W4 z# }8 O8 Vp.s. 求''堂''字正寫...

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已是正寫吧