sakura310

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2008-01-18 00:25:24 | 阿感 | 2
$ @6 w( ^* R. h3 _8 |2008-01-18 00:24:20 | playbr2 | 2
4 ]+ k+ _& C  f1 E% z2008-01-18 00:22:02 | 但丁 | 27 s# \5 U* P* ~( d& j! {0 I
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點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:8 Y8 {+ H3 h: r* C. _
Filename: DSC01158.JPG5 }  f4 S  s( ]% o! O* Z
Datetime | Downloaded by | Counts
- [8 K' N1 `3 q2008-01-18 00:25:24 | 阿感 | 2
: n) B0 W& f4 t; u2008-01-18 00:24:20 | playbr2 | 2, a  |; S/ ~/ B3 m
2008-01-18 00:22:02 | 但丁 | 2
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# x3 V3 }( U" w5 ?. U點解大家都down兩次? XD

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, i& ~! f: S/ S6 V3 q5 f2 O. k* ^9 ^我第一次開睇左2秒就close 左+ B8 y, @: l3 S1 L$ F* N" h
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:$ v* W( q4 B& m1 i, W7 S! H
Filename: DSC01158.JPG4 n# {0 ~+ P; _) M
Datetime | Downloaded by | Counts8 J) I/ _. e2 v. a
2008-01-18 00:25:24 | 阿感 | 2( ~; Q* \% a4 ]
2008-01-18 00:24:20 | playbr2 | 2
$ l, H/ I0 o5 m& \$ P$ T" l: i2008-01-18 00:22:02 | 但丁 | 2  R7 f6 n/ @/ U* q* {% m

5 l7 \, c, `7 d點解大家都down兩次? XD

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3 z, n5 [: G! E5 c; C6 k2 e快d捉我錯處  D+ \! N1 X7 V0 b, H  o- y- p5 V
話吾定我都打錯 + - 符號
3 v3 D& t$ ^" }0 X: c9 `係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
! s; _+ l' q+ a0 h不過,c=101n哥度(解除n係正整數的限制,只是整數)
7 j% ]) ~0 V7 ^3 F  d2 m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~)
* l7 \0 |' F- @! ^7 h! s知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題" H3 A  r$ U2 n3 k; o  b
但原先是不知答案,所以唔知有無失根
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  ], y: m: X) @7 E有時見到題目都感到有點不爽; Q& y2 H: Q; U8 K2 U- _
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, j8 f1 |7 ?8 f2 H; \" d- [9 c: E
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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" C4 l* i& o: [6 L5 U. _0 _0 r2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
1 d3 `. D: X  c冇答案ga...." Q$ c- ^% O* W+ f
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2條equation solve 唔到3個unknown ga....

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agree
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* {- r% k( z: G+ \- p4 R" y3 v! H2 equations 2 unknows: l1 {& O) j( y) S

1 |+ F0 D5 h2 `' e2 k+ ]+ k% Aif 3 unknows there should be 3 equations
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# S! x7 Z+ N( t" J6 J! }4 Kmake it simple ' y1 u2 b( o6 {( _2 p
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say
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a + b +c = 3- [) u5 r+ H7 \5 X

# V$ H! p' u3 W6 j! @6 F( Y' sa+b = 2
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then c is 1 # `0 H$ x* q( S( D/ M# {
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a = 2 - b # w5 u( Q) f6 b6 S5 `' G# C7 K1 x
( ^2 ^8 ^' [! w2 k& q7 Z$ ]
so 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
0 C5 d5 j. \/ T冇答案ga....$ F" x" W- |  N5 \
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2條equation solve 唔到3個unknown ga....

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$ D- z' h6 l3 H9 n此言差矣~
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1 C. a8 b6 J' Q/ x6 }8 O6 d* K9 o2條equation solve 唔到3個unknown ga
2 l: ^$ g. `- ~1 X% g  G& z還欠一個條件,就是3條equation都是linear independent(線性無關)的# g1 x$ f( o" q8 O" Y- B' w6 t) K8 A

* l: r+ H3 R$ E簡單點說,多元一次方程就是線性方程的一個例子
$ p  t! g# E. J1 ]& A8 f# \3 `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! O+ m" n+ ]! i$ z- Y

( r$ L) U( J1 B- R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~)
3 U0 y; X- K: E% }+ g5 {例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解( O& z! [) K* k
有興趣就解解看, E9 O8 z4 M& G
不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:0 y( I& G$ o, n9 r

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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:( F* \: X+ R( _, i2 m
捉錯處就唔敢當
6 s7 z% F, d, B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
* E" B. o( d+ c/ g反而適當地調節一下 , 咁會理性好多
8 k. Q, |$ k, U0 M就好似隻game 由12粒珠 加到13粒珠咁6 s. i8 {7 l& e: L0 i
當''堂''好玩哂3 a( y  z0 r, f! ^0 I) @
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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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2 i. g/ l7 E/ T( \p.s. 求''堂''字正寫...

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已是正寫吧