sakura310

Filename: DSC01158.JPG) M/ I/ q; s4 s' ^6 l' r1 r8 i) o
Datetime | Downloaded by | Counts
  [. U& l1 V/ p1 j2 n; X# |2008-01-18 00:25:24 | 阿感 | 2* d; P3 ?! v3 t3 L5 F/ J
2008-01-18 00:24:20 | playbr2 | 2
5 w" P$ z8 h: S6 m$ E# Z2008-01-18 00:22:02 | 但丁 | 2; n4 e2 V+ M( Y+ G6 p& X0 b+ o/ q( @" R4 I
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點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:& ~" h9 }4 V7 d# h! n% p
Filename: DSC01158.JPG; I) B7 O( B& C0 L
Datetime | Downloaded by | Counts
2 V9 s& G  K! b! X2008-01-18 00:25:24 | 阿感 | 2. l2 c. R2 K- s* ]! q' Z: ~6 x
2008-01-18 00:24:20 | playbr2 | 2
* S8 ]+ b2 t6 @) O( ~7 O7 ^2008-01-18 00:22:02 | 但丁 | 2
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0 X7 K9 i  L. Q0 p- A3 c; \點解大家都down兩次? XD

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" l8 g7 a1 G6 D我第一次開睇左2秒就close 左
( |6 o+ g/ s2 V2 b+ ]4 ]  }% g% o2 F之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:) t" ?2 L3 q  i4 M+ V; h
Filename: DSC01158.JPG1 ?; M0 i8 E; u
Datetime | Downloaded by | Counts' J( m3 K! M0 P
2008-01-18 00:25:24 | 阿感 | 2$ k$ o  D. V% N+ P% [: g
2008-01-18 00:24:20 | playbr2 | 2
1 X( C! P- i; b  l2008-01-18 00:22:02 | 但丁 | 2; E: k" F  W3 V8 b; ]8 ^8 v$ x
9 l8 b& |% C% _6 |, t, k3 z, {
點解大家都down兩次? XD

: y. V3 c6 M# G$ F8 G# e

3 g/ V. E3 m$ c! \# S, S快d捉我錯處
/ l/ V  k' _# C+ l) o3 M1 h話吾定我都打錯 + - 符號* o& S5 Z7 A* @  ~7 e) s4 i
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當' r+ P+ R. U- o4 ^
不過,c=101n哥度(解除n係正整數的限制,只是整數)( R9 p$ t4 h: ?
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~)
0 o0 V' P4 d4 X知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題7 \6 T7 {5 m+ H0 s: C, K, [
但原先是不知答案,所以唔知有無失根! e+ w5 N$ A7 _2 D% i

; G$ E7 b; Q! j% t2 k有時見到題目都感到有點不爽2 s1 C. a: G; ^0 V3 _% B' z* p
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
) j3 g  M4 A! R6 i4 q) Y5 B  p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....5 r4 g# U, h* h$ e5 o6 e

; r* W, F* A! u8 p- q: w& b: S, n! R: `/ v2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:6 p0 M4 E( i8 w
冇答案ga....; H4 H8 q" c$ l. F
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2條equation solve 唔到3個unknown ga....

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agree
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2 equations 2 unknows
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if 3 unknows there should be 3 equations . a( D0 B: F6 |7 z( J( s
4 z# r9 D3 O% h; g9 S1 D2 z
make it simple   x8 J' x- N+ T
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say 8 D" _  T+ l5 b0 r" G0 R
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a + b +c = 3
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a+b = 29 J; |1 e9 w& A8 `  F3 R

5 F1 ?$ b4 R' g2 E: f$ bthen c is 1 ( M" ^5 k6 b$ L2 d* ]+ ?) S: H; @

3 r5 l% y5 S* p+ L* _a = 2 - b   j, H* p& B6 ~. U; o/ t
  q$ I2 t6 c$ \, ?" O7 Z# k6 K
so 0 = 0 . ~0 D9 f( x3 Q

, c# V1 ~7 q: B1 x

sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:% B, V4 [( a6 [, A: N. H
冇答案ga....
4 m4 o, Z9 q2 w/ H& E/ j
1 O( F  N% l% [9 j% H% q2條equation solve 唔到3個unknown ga....

+ c$ q- o( ~5 G# B& H4 |6 z1 ?( s* Y9 [8 r( J
此言差矣~) V: {+ ?0 W, U; X' E

: X+ c7 w5 {- \$ R2條equation solve 唔到3個unknown ga
9 q. W5 r2 d& |' A還欠一個條件,就是3條equation都是linear independent(線性無關)的+ |; ~1 E, ?+ ?8 S1 }3 ?- G% k. u
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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: G2 r9 D7 a$ ?' y% 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' e- ^1 ~- R) r5 Z) n$ U7 z- `
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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~)( g+ a2 S  c+ ^
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解! z& `, j) _* J  f
有興趣就解解看: D6 U8 J: b' W. ~2 J" P$ w
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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8 ~9 k: c! c2 X0 i, C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:2 g  y9 O* ?" W/ z7 h
捉錯處就唔敢當& r6 q3 m' Y7 X4 w3 v
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) v$ y" E0 Y" z( C/ a! Q( G
反而適當地調節一下 , 咁會理性好多
# k. ~2 v" b' A/ `. ^$ Z; `就好似隻game 由12粒珠 加到13粒珠咁
* C1 l" |8 f" h$ m& @! Z5 v當''堂''好玩哂$ L( i# X7 N) }3 M

7 c+ G: j6 t% B- r/ g6 ep.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:
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) f6 @6 V( K$ ?* S$ x4 Up.s. 求''堂''字正寫...

6 F7 [8 u( s9 s. m/ T" Q5 K已是正寫吧