sakura310

Filename: DSC01158.JPG
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9 h1 W8 h  h: {' m) A2008-01-18 00:25:24 | 阿感 | 2  X5 I6 R% J) R8 x/ N/ R
2008-01-18 00:24:20 | playbr2 | 2
" C6 C+ h( Y% i8 J: f: ^: T2008-01-18 00:22:02 | 但丁 | 28 L3 q* w+ y- V* x* d

9 e6 ~' Y. ]/ |4 n, W" i點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
! J; o' h+ H* _: g0 E7 f1 NFilename: DSC01158.JPG
, r' E; @) f# v* L# hDatetime | Downloaded by | Counts
$ s: Q9 j& U) s5 y4 P2008-01-18 00:25:24 | 阿感 | 2
5 D, L% e3 `! z% r) ~5 ?# B4 G7 C2008-01-18 00:24:20 | playbr2 | 22 A+ N" t. ?$ h
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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; ]) Z' x" V4 U2 r4 y9 E我第一次開睇左2秒就close 左; ~! z+ X( i, O# O* G( ?, Q
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:+ C  p, J, \7 n; I6 S
Filename: DSC01158.JPG7 G$ A6 K' L; R/ I+ t
Datetime | Downloaded by | Counts4 E! u4 c6 i5 Z! r+ C3 e
2008-01-18 00:25:24 | 阿感 | 23 H8 ~: }8 H% t( I: g5 d
2008-01-18 00:24:20 | playbr2 | 2$ Y" Q9 I2 m& U+ ~% @
2008-01-18 00:22:02 | 但丁 | 2. A. d8 c; \# S1 u, V; J6 m
, G9 d; {# j8 [: |9 o5 f: D8 l7 U
點解大家都down兩次? XD

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快d捉我錯處9 q4 Q% K9 x0 h+ y
話吾定我都打錯 + - 符號* y" t0 d  r  q3 Y& y- ?
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
/ {# X& p+ y  g3 [不過,c=101n哥度(解除n係正整數的限制,只是整數)
, w* h$ ^. A7 ?$ `+ E4 V$ i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~)
  R! \) d* ^* u知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
1 t4 I  k5 I3 N+ t9 J但原先是不知答案,所以唔知有無失根7 b  \* b% {+ K8 j5 {  }. d) @
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有時見到題目都感到有點不爽3 d% d3 |0 S5 r1 k* _
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; q5 c$ u) n; 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....
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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:
5 g. ^2 Y/ H% H. \& Y冇答案ga....
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( h# l4 M% C- h* w2條equation solve 唔到3個unknown ga....

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agree
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2 equations 2 unknows  A5 q# R% a/ m7 A. R) [

4 c' k4 R) f  t7 {if 3 unknows there should be 3 equations
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make it simple
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say
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a + b +c = 3* X3 E1 q9 t" v5 ^, f* M/ _
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a+b = 28 [1 {" t* l" F' Q9 ~

  w# v1 B! ]9 v4 Y% Zthen c is 1
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$ W4 U7 E# ?& N' R- K; }a = 2 - b ! d% M/ c7 W. |3 J. ^5 M

! f( S! [- M8 f: xso 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:: o# W& P7 }6 J- D4 |
冇答案ga....
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9 \+ k" w8 y" A& W# p6 v0 B! [2條equation solve 唔到3個unknown ga....

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此言差矣~
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2條equation solve 唔到3個unknown ga5 X2 ~& z7 c" H# G+ _4 j, _
還欠一個條件,就是3條equation都是linear independent(線性無關)的! F* ?( I4 j. ]5 E/ E2 Z
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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* o4 L& J3 n5 J9 X& R4 d
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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4 z  G/ K4 {4 N7 c! K* ~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~)* e( s8 U  \9 }% G1 S
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
: m) O* R; W% f有興趣就解解看6 V: M. d4 M; t% S! I7 u
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:, z/ W" c0 M! b' l4 p% H3 g
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1 N! x" @  ?0 U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:
+ t7 p( u, Z: p8 w捉錯處就唔敢當4 N* Y" R9 K7 I' v1 [
不過,c=101n哥度(解...

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6 |' h! ?7 w( |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, X1 E) X4 b* I  Y( b
反而適當地調節一下 , 咁會理性好多
9 K* B5 [" `0 i9 N& _$ ]. |就好似隻game 由12粒珠 加到13粒珠咁
" U1 L. h" I6 v) t當''堂''好玩哂6 F6 s3 i4 G$ M$ O6 ]3 Z
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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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p.s. 求''堂''字正寫...

( B$ B4 U* e  x) y% j' a已是正寫吧