sakura310

Filename: DSC01158.JPG0 d& N& W* q. B" r4 B* }( f+ E. h1 m$ `
Datetime | Downloaded by | Counts
/ Z5 U; z: y; d/ i; L" ]5 [2008-01-18 00:25:24 | 阿感 | 2
' P/ U9 j& d5 L2008-01-18 00:24:20 | playbr2 | 2
4 ~) m3 Z* `  |, S# p8 g2008-01-18 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:: s5 U6 J& x! u3 a
Filename: DSC01158.JPG7 q( |9 `, P( @/ P
Datetime | Downloaded by | Counts
  O) U* z9 m5 e2008-01-18 00:25:24 | 阿感 | 2
+ \% s% `3 `3 `' x6 l2008-01-18 00:24:20 | playbr2 | 2
5 i; D. s& {2 `2 \2008-01-18 00:22:02 | 但丁 | 2
5 w+ ?+ i, J8 e6 a1 b" L. u- {$ K2 r* }+ a: _; s# _1 u
點解大家都down兩次? XD

8 ?" y. d" `$ K! C+ k8 m2 L3 W0 A) I* n" |3 u
我第一次開睇左2秒就close 左
7 s. n  T; j7 g9 k, m9 U+ a# s之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
' d0 B+ Z4 U2 z: yFilename: DSC01158.JPG& t, |+ Y7 G/ t) }/ {+ i. Z
Datetime | Downloaded by | Counts
1 b- D8 T" ]) T% K( w, X3 V5 X6 B2008-01-18 00:25:24 | 阿感 | 2% O% V0 L  S5 {. F
2008-01-18 00:24:20 | playbr2 | 2
1 {1 e5 a9 S( N3 E/ c; O2008-01-18 00:22:02 | 但丁 | 2# l2 C! e' {: a8 t# q# ~- S/ B

9 J9 F' S) o0 F點解大家都down兩次? XD

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1 n! W- ?6 ~0 V) s! g3 b快d捉我錯處( p0 V) [1 {! j. }  E; F  k
話吾定我都打錯 + - 符號
9 @" o) }$ M: w3 a' J) N  \$ F係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當2 @: k" m' t3 h$ Y
不過,c=101n哥度(解除n係正整數的限制,只是整數)  ]* Z# ~2 y* C) Y7 m% s
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~)
% i3 Q) E9 g5 j" W  c# \知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
; M' A& o- S0 |, ]2 G但原先是不知答案,所以唔知有無失根9 m2 \; s. I5 @

/ }/ v. n: v4 {" J有時見到題目都感到有點不爽6 C! c1 m; U; K  O! l
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
7 S) `- W& G+ D, D4 r; }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....% N' h" j9 ^# x0 r& u0 P
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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:
7 }' d1 B; ^. `% _" Y冇答案ga....
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$ w% i9 [. [0 N3 g2條equation solve 唔到3個unknown ga....

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  k& q! s6 |, R+ K+ T0 L  ~7 ^agree 4 E0 Y! e- x# ~. D
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2 equations 2 unknows
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3 M) W# s6 }" U, x% e6 ^if 3 unknows there should be 3 equations + c' L# z) u0 J4 o/ ]3 k

- J4 p* H3 N+ x* E: q% U2 _make it simple
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say   p7 R5 B- j# E2 _) @3 {7 q0 r' J8 \

* B: U% s" q6 X* z2 {% i( S* Wa + b +c = 3
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+ h4 e% p0 `# a3 Z) `2 \a+b = 25 t4 Z2 q7 l, C) C+ N

5 a  O# [4 c+ I, l( q# ^! n' Tthen c is 1 8 |4 O! i( n" f/ Y2 I
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a = 2 - b 5 h7 N2 B+ M* O2 w
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so 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
, @2 e. I4 L/ U4 h: b$ T冇答案ga....3 A9 a; m5 z+ W8 h  \5 w

/ t3 W' H5 u  F; U5 d% r, a2條equation solve 唔到3個unknown ga....

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) |; Z% S' f) d6 E6 N( n0 y此言差矣~% G* e  m9 s$ R
4 k# D* a9 b6 e, j' [  ?( c
2條equation solve 唔到3個unknown ga3 n- {6 l9 i6 H# O: g
還欠一個條件,就是3條equation都是linear independent(線性無關)的, h' _4 w! |0 y3 n6 F) ^7 N

, I; t; b9 Q0 F+ f' P5 y; b$ R簡單點說,多元一次方程就是線性方程的一個例子
8 B, I0 t( D) O4 i2 c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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. y6 o) D5 w" F% @+ ]+ j! b8 e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~)2 G. L  h  |0 j& G7 |
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
  D9 o. J' K( x# j; w# S8 v: x有興趣就解解看
1 ]. _4 @- z4 @不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:! ?& a$ Y! ]. a2 x/ a1 p
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+ J' P7 t) ^0 B3 M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:5 }$ f, t: }. B4 D, k. Q; c8 c
捉錯處就唔敢當6 l3 g- W; F/ ]9 O' A8 j& j
不過,c=101n哥度(解...

2 G8 D' B. ^2 x3 C7 D

: C1 V2 x, ]9 f% ~' N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% @6 P# o! [6 @$ X8 ~' f7 \! o$ F3 E
反而適當地調節一下 , 咁會理性好多
) m1 r7 z" N# B( U就好似隻game 由12粒珠 加到13粒珠咁
2 J. @) R  T, y! U- `% E  d2 L6 K當''堂''好玩哂
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* F9 O7 H7 _% Y& p/ o; [, Wp.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
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& f1 M( `6 o9 a8 i4 @$ \, Q- F/ J  _p.s. 求''堂''字正寫...

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已是正寫吧