sakura310

Filename: DSC01158.JPG3 T% t( \+ x, T) q+ `* c3 {# H
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1 g, _. X4 S% ^. \3 M2008-01-18 00:25:24 | 阿感 | 28 e6 l6 [  j* Z0 E. ?  ~. {( ?
2008-01-18 00:24:20 | playbr2 | 27 z% a9 S' \5 ?, M2 b
2008-01-18 00:22:02 | 但丁 | 21 r2 L% ?1 B! R  i# W
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點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:% W: y7 Z( K3 J. M4 j0 Y' Q
Filename: DSC01158.JPG. I5 A: |; e' j2 [" [0 P
Datetime | Downloaded by | Counts2 ~  A% q) y# Q/ `! T% W% k; w& b
2008-01-18 00:25:24 | 阿感 | 2
" y4 S7 C3 \7 q! i( Y2 ]2008-01-18 00:24:20 | playbr2 | 2
$ l5 i8 Y' @4 K/ U) ]+ A! H8 ~2008-01-18 00:22:02 | 但丁 | 20 Y) [5 d* l/ H- n* a

- q+ S4 F2 `9 X點解大家都down兩次? XD

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% g8 {9 P: ^. p6 v1 _0 `我第一次開睇左2秒就close 左. ^" Y, T+ E: x" p: E4 l
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:: j0 ]3 A% {( Y" a* A% ?
Filename: DSC01158.JPG! L$ F8 }) z# U
Datetime | Downloaded by | Counts
3 F1 n7 w  L" U( ]2 n$ J$ I. X$ g9 q2008-01-18 00:25:24 | 阿感 | 2
) ^: v8 E$ X1 x2 |2008-01-18 00:24:20 | playbr2 | 2
! T# T2 y. L9 E, E9 _& N+ X2008-01-18 00:22:02 | 但丁 | 2
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點解大家都down兩次? XD

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快d捉我錯處$ Z+ d+ u7 X# e- _: ]6 P
話吾定我都打錯 + - 符號4 U. p- g% V0 g  j* P2 a
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
4 N6 n5 t$ ?8 @5 L/ A. ]不過,c=101n哥度(解除n係正整數的限制,只是整數)
. f( j! l9 K# ^7 n5 S6 X+ v3 C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~)
1 E# V- |) A1 G+ C' Y知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題; R/ C/ D3 v  R3 A5 A
但原先是不知答案,所以唔知有無失根" Y+ _; g) g! P1 }% Z

2 y2 B& Y3 `$ |- j; J1 i有時見到題目都感到有點不爽9 ]2 l3 D: z, ^6 A3 G! p2 B
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
: q3 |) Z% |$ l" y9 s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....- W& z" e! U+ d
0 \, G  z- H1 a& X3 c
2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:0 ~* h) c9 _! ~0 ?1 |& F7 W6 {3 |
冇答案ga....
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2條equation solve 唔到3個unknown ga....

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9 b& b$ _! B3 f% w# magree
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2 equations 2 unknows: `0 h- P. [1 }9 h  I$ p
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if 3 unknows there should be 3 equations
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make it simple . Q" y# T/ |1 l. @; ^; }

3 _. x- ~- C" Zsay
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: j, ]) L/ M3 M2 Ga + b +c = 3. S. O' x+ T# l( D
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a+b = 2! Y& p. |* F- c* b$ l/ U
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then c is 1 + X/ n+ Y9 R4 C3 o  z% j3 Z
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a = 2 - b
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% m8 n- c8 w* Z5 Nso 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:8 ^- d/ Q  q6 V) Q7 L1 P) g: U  v
冇答案ga....
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2條equation solve 唔到3個unknown ga....

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此言差矣~
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+ z3 I3 q2 p, Q7 C" b: T4 q2條equation solve 唔到3個unknown ga/ q2 z1 ^! ?/ r$ {& y" U
還欠一個條件,就是3條equation都是linear independent(線性無關)的! _) Q$ a8 K) P+ K, f5 e- i
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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2 G" n. h! E; L9 M) K
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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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~)
. R' S( ^  V. w9 o4 z6 v例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
* A- p7 |9 l  i) X4 s: d$ C有興趣就解解看
# q6 K' @4 {9 Q) ?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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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:- D+ v9 I! }1 @$ o# I
捉錯處就唔敢當' a# o+ B# x' d4 c' ?  ?
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
" z  T. U1 Q' ]3 o反而適當地調節一下 , 咁會理性好多
. N/ r+ d7 c# d3 Z) X就好似隻game 由12粒珠 加到13粒珠咁
$ l0 o9 \% ]) K, \當''堂''好玩哂
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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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. e  {( G) M- G$ l+ Ap.s. 求''堂''字正寫...

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已是正寫吧