sakura310

Filename: DSC01158.JPG+ [% _: q% i1 _# r% ]  e
Datetime | Downloaded by | Counts
1 G& l: C0 v0 v2008-01-18 00:25:24 | 阿感 | 2
8 y4 M( k% l9 q9 |$ P2008-01-18 00:24:20 | playbr2 | 20 \* q1 `( T1 Q
2008-01-18 00:22:02 | 但丁 | 2; l& Z/ ~# k; a1 Y' y2 d1 C
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點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:* `  i) Q" m# `* J& t/ b
Filename: DSC01158.JPG2 `& b; H1 p3 K0 s
Datetime | Downloaded by | Counts/ h; H1 Z- X8 V5 g
2008-01-18 00:25:24 | 阿感 | 2, [* k0 F& f' g2 o5 |) r8 O8 ?
2008-01-18 00:24:20 | playbr2 | 20 a4 t$ ]4 s% }* \, G
2008-01-18 00:22:02 | 但丁 | 23 M' P, y2 [1 x- d3 l
4 l$ |2 O$ k5 n/ Y* T" E
點解大家都down兩次? XD

  H+ T3 Y4 _# v+ b7 {$ `

- b, Z! J" j8 [( [$ J) H我第一次開睇左2秒就close 左
$ N( k3 j* g4 R之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:0 {+ P8 i5 o; X. j
Filename: DSC01158.JPG% ~7 w9 z' B8 D8 x8 C3 {4 v
Datetime | Downloaded by | Counts
) d  |3 e( {% A3 J% G' t/ g2008-01-18 00:25:24 | 阿感 | 25 [& [+ g5 D8 T) o/ F
2008-01-18 00:24:20 | playbr2 | 2
$ h* O0 Z* D: c/ Z6 c9 S2008-01-18 00:22:02 | 但丁 | 2
- r+ U1 L/ O- ?$ k+ K- _0 H+ t5 ^& C+ e. N+ m! X! q# [
點解大家都down兩次? XD

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; h8 c3 J+ d: S* C, c  c快d捉我錯處
$ k! _  v9 H, Q1 J$ N$ {" K話吾定我都打錯 + - 符號
& {7 f! n  z1 {) [7 u4 C- [' v係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
+ f$ \1 a  V' n9 ]( ^+ h; C不過,c=101n哥度(解除n係正整數的限制,只是整數)* s9 w6 _  ?' _1 x2 I0 r- n. u
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~)
! y8 u& J, ?- y1 l! O8 T知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題- ~- \) H+ g& Y, O0 p5 S
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. v1 C* y3 U/ \1 Y6 Y+ A9 g
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! O- k; h# b( t% s6 G: g5 U
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....
4 {* M$ P$ S2 G' x# B2 _/ ]/ W/ k6 e' w! X2 J9 w
2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
8 b: b( E7 n6 W; c! a冇答案ga....- {" x) e2 M& ~

; b- A, U) w/ |$ W7 A" \+ x* L2條equation solve 唔到3個unknown ga....

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agree 0 h& B# {0 y$ i  U- D% Z

) p) Y" f* {, R  z2 equations 2 unknows8 R( T, t, U) n/ s
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if 3 unknows there should be 3 equations 5 P7 N* B9 y# C# J" n/ d- q! `

% e) `7 {( t7 D# g0 y4 d* K3 `make it simple 6 Z" a% {) t& O5 @

4 ~+ b. f4 _5 Y& t- N% m+ l, J1 v9 h) Psay
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a + b +c = 3/ L% M: o* t' F1 ]6 g7 `  G
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a+b = 28 m& r4 {, Z) d' S3 ]4 {* X6 D
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then c is 1 1 @, m7 ~1 \6 b# _
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a = 2 - b
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so 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
; H6 \% Q- A7 p- u6 J% s冇答案ga....2 S6 ^5 C' h& e/ b
  j- F+ W7 x( R, N8 r: d- }
2條equation solve 唔到3個unknown ga....

3 R. j" |: e, H" w5 ]8 f4 o/ i5 G% _
此言差矣~
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, ]% Y) g. J/ g) i3 _& p4 H4 M, T# W2條equation solve 唔到3個unknown ga
2 y* t7 g) ]0 `) k還欠一個條件,就是3條equation都是linear independent(線性無關)的
2 M5 o$ H, w2 a% v# f$ G. m# v7 F3 g5 t; F( D. e1 i
簡單點說,多元一次方程就是線性方程的一個例子0 l) J4 t! A8 V8 ~& r; t5 k# 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: I6 h1 |' i% U

! w$ Y, }" `; y, f% l, O- X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~)" S+ t' H, i, j( a6 `$ Q
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
/ ~7 ?8 l% u: P有興趣就解解看
! ~! W% g, y, L" I$ j不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:9 Z. F% [0 U& o% i6 G4 w0 ]

9 G0 P6 m+ e7 H" F" h+ o* u8 M# z2 J. K9 C3 b2 |9 I- B2 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:' e' Y/ L! Q1 u9 Y! G# d& \7 ?, `
捉錯處就唔敢當
& n; T$ @2 f3 @" X! d* ^* T8 X- ]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6 ?# c" A# K: b
反而適當地調節一下 , 咁會理性好多' i7 b8 t- F1 P, k; ]/ s+ @8 W
就好似隻game 由12粒珠 加到13粒珠咁
: r6 |' ^+ M$ S8 C! \7 Z' u當''堂''好玩哂; l; _" I3 Q, b/ Z! d
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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...

+ Q4 O+ V, x& ]8 q已是正寫吧