sakura310

Filename: DSC01158.JPG8 J- r- z' f* q& _
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! P* E% A& K3 \% C( b  P3 S' u' [2008-01-18 00:25:24 | 阿感 | 24 j$ ?) |9 P: ^( j. Q. R
2008-01-18 00:24:20 | playbr2 | 23 j7 Y/ P) S/ f
2008-01-18 00:22:02 | 但丁 | 2
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點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
9 F- I. d; A- l3 x, UFilename: DSC01158.JPG* o) p; M% W5 {/ l6 A/ u
Datetime | Downloaded by | Counts
2 Y- w" u+ s2 B2 i$ A0 a, {4 r2008-01-18 00:25:24 | 阿感 | 2
# f6 y# t8 n$ ]  _; R5 p/ ^2008-01-18 00:24:20 | playbr2 | 2, e9 k& @+ i0 Z2 L
2008-01-18 00:22:02 | 但丁 | 2/ H8 C# |2 v! \  d. m5 x

  Z% l' P4 `" S1 S7 y$ f點解大家都down兩次? XD

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! s- w. I# n, R$ P! ~我第一次開睇左2秒就close 左9 _$ z# G4 f7 h9 D
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
3 }# A  Z6 Z) e# ?: {; {Filename: DSC01158.JPG
" K9 I$ @* V( W! i6 T0 W: yDatetime | Downloaded by | Counts
. s- D" A! F, x2 n: u* ]2 h; b0 `2008-01-18 00:25:24 | 阿感 | 2  T8 q5 n5 ]' S+ r2 a
2008-01-18 00:24:20 | playbr2 | 2
& o* K1 I& O; Q4 i0 c5 ^2008-01-18 00:22:02 | 但丁 | 2
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# p1 b, q5 T7 f. h點解大家都down兩次? XD

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快d捉我錯處
8 v* j/ `3 R; ^$ m話吾定我都打錯 + - 符號6 X( s5 h% x# I
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
( I$ I8 {9 q3 X% f* ?* H# _7 o不過,c=101n哥度(解除n係正整數的限制,只是整數)
5 w; N5 M) a9 Y9 g$ `- j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~)! s7 u1 M9 {5 s* E: |7 Y+ `
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題/ W% M6 D7 Q/ `5 V  X3 W
但原先是不知答案,所以唔知有無失根
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有時見到題目都感到有點不爽0 C: y4 ]+ B0 J+ Z
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6 O( d0 L& [% E( d4 N
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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& z+ _: k) x; D1 k+ K) e4 v2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:- U0 x6 h9 Z+ b) V
冇答案ga....
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2條equation solve 唔到3個unknown ga....

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, Q) f+ p1 ?7 h" oagree
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0 ^$ z9 x! E* O7 r9 e" _2 equations 2 unknows$ [- m( o6 O5 ~

# H% ?1 M1 J8 B6 V- G" zif 3 unknows there should be 3 equations / h+ l$ ~0 d9 r* p( `& I

8 [  S. i; G, q' F. N6 Gmake it simple
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say : W7 K8 C6 ?9 i; \& m2 ~6 Z, P

$ x8 L$ s# A8 k2 Ba + b +c = 3
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2 \. b0 {/ @) H4 e6 q' }* Ya+b = 2- a! _3 T9 ^3 i6 Z& H
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then c is 1
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a = 2 - b
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. ~: p: P/ G5 K) l! Cso 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:. `6 H* }1 ?- Z  _* G7 |
冇答案ga....3 V4 l) F% C. K

; ~& T% a0 }. ~2 a; p1 y; T5 _& Q2條equation solve 唔到3個unknown ga....

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) P, |9 i$ j1 f3 T此言差矣~/ ^' B2 B4 _4 E: q0 o# c6 ]
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2條equation solve 唔到3個unknown ga$ a5 L) w5 F' \3 @2 u
還欠一個條件,就是3條equation都是linear independent(線性無關)的
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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
, A8 U  r/ e9 S$ B( q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/ h9 g7 F7 b5 D' J
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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~)" s8 @) U0 u: x- b/ C  w1 B
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
; W8 u( J# Q- w5 N$ l1 v& }有興趣就解解看" f" W$ v1 y3 ]4 F4 Z
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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7 [. _' Z; j% ^( ]6 j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:
1 q5 C" }' t$ a) z! S捉錯處就唔敢當
4 @: Q  X2 @* ~- u2 n4 Y9 L不過,c=101n哥度(解...

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" U0 ?$ J9 u$ Z) v) n/ ]! c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
7 O4 v/ a: p7 q  M, z9 v反而適當地調節一下 , 咁會理性好多
- p0 ~$ Q+ J& l3 U, P就好似隻game 由12粒珠 加到13粒珠咁
- b# _4 x% a+ g3 M  M當''堂''好玩哂
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% X; Q/ G/ c/ O- V- p9 op.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:, U) u$ d5 f; n% t9 D* n. q$ N' m' n

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p.s. 求''堂''字正寫...

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已是正寫吧