sakura310

Filename: DSC01158.JPG
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2008-01-18 00:25:24 | 阿感 | 24 V1 B+ T5 G- V! w# v
2008-01-18 00:24:20 | playbr2 | 2
2 Y$ y# ~1 ?. U0 D: D2008-01-18 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:
4 j  I1 v' u0 [Filename: DSC01158.JPG
6 w) z/ [0 V1 f/ x1 M$ j+ I4 TDatetime | Downloaded by | Counts7 Q9 z# S6 k9 w6 K
2008-01-18 00:25:24 | 阿感 | 2
' \/ m9 ~) U5 r9 c4 k2008-01-18 00:24:20 | playbr2 | 2' S9 F8 _3 g  r* P  R! W( V& m
2008-01-18 00:22:02 | 但丁 | 2
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2 f9 K+ I: M  Z" A/ ~: h點解大家都down兩次? XD

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( X! y4 A( g0 ?+ h; u& n$ }/ o我第一次開睇左2秒就close 左9 e- S" K; Z# m$ V# e
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:! s; x+ K* x$ |6 r5 f0 Q
Filename: DSC01158.JPG
& \" Q+ i* ]/ T! U  UDatetime | Downloaded by | Counts
1 ?) T. q( x$ M& L3 q2008-01-18 00:25:24 | 阿感 | 2
! C( f8 `1 T8 x6 S. ^: I2008-01-18 00:24:20 | playbr2 | 28 ^% x; h2 z3 i9 e6 _
2008-01-18 00:22:02 | 但丁 | 2
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7 \; a1 [. L' a3 H+ p7 ?; {( G) u點解大家都down兩次? XD

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: I" i5 W$ K6 l8 b$ B+ B快d捉我錯處
1 c0 E4 `" m4 s+ c$ m* o2 Q話吾定我都打錯 + - 符號' S5 t# }: I% U& P! N
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當& C/ \# D3 a3 E/ Q
不過,c=101n哥度(解除n係正整數的限制,只是整數)) j. H6 B+ `! g
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~)
) V0 a1 j8 T* v6 A8 ?8 c/ _知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題2 Y8 _5 ~' \6 V
但原先是不知答案,所以唔知有無失根- n7 r3 _9 K8 p$ |+ S5 g
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有時見到題目都感到有點不爽
2 b/ s6 p( d% b# c6 C; S7 w4 E9 D! c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# D5 S; M/ s3 l% o8 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....' P3 t- H! O$ n

# q, ?2 C. Q2 o8 [: y' `2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:9 Z+ [# R2 g# l2 t3 B% Z; _
冇答案ga....
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2條equation solve 唔到3個unknown ga....

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agree $ K% B9 B& Q- [& \# v- p

3 O( B1 ]' p( l2 equations 2 unknows4 N7 \  L- I" d- D4 m+ u5 D! @
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if 3 unknows there should be 3 equations
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- ^- W8 O) w, q8 v1 zmake it simple ) q' q$ t, [2 x
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say
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a + b +c = 33 w  d2 m" g8 P* N3 P$ i0 Z
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a+b = 2
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" Q6 `: d# F! H# u# S) m# m9 mthen c is 1
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0 e" a* i1 ^0 x! N' x3 h* V7 Sa = 2 - b
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so 0 = 0 % O  O. N* P4 X9 M

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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:( U; L$ n5 @1 k* T( @: p
冇答案ga....
  c6 @0 q2 x- p9 _" p( V- p$ e
; w: d/ m2 E3 J4 l0 e! k2條equation solve 唔到3個unknown ga....

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此言差矣~* p1 m/ b/ Q' Y9 f4 p
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2條equation solve 唔到3個unknown ga% }( ^/ f+ E) c$ ?
還欠一個條件,就是3條equation都是linear independent(線性無關)的
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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" n4 E, r3 C4 C5 n% w9 }
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~)7 }7 T4 v# U5 u, g# r& q
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解5 S4 ^% h1 \$ B3 W$ Y: F% r, P7 i
有興趣就解解看" {5 n) K  Y  |6 ]. M
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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! V0 R/ a3 z" u' l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:
+ @. U1 \" W6 }' o9 `5 J捉錯處就唔敢當1 E  Z* Q+ j& p  g* h2 M
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
1 z! f: i8 K( s  g3 C' u& ~6 F! @2 G反而適當地調節一下 , 咁會理性好多; u; u  f+ A% Z0 `$ g
就好似隻game 由12粒珠 加到13粒珠咁
5 d4 p9 z7 c' @8 t3 p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:* a( e+ g0 q8 Z) V" ~+ {$ K3 B- F

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4 A7 B; D. N9 }( k- t+ m: @p.s. 求''堂''字正寫...

5 e/ l6 T/ L2 V3 g; d7 Q% W已是正寫吧