sakura310

Filename: DSC01158.JPG6 X) M" c' _; w. S
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2008-01-18 00:25:24 | 阿感 | 2
" i6 ]6 I) E9 d4 R& G0 P2008-01-18 00:24:20 | playbr2 | 2! t2 I- t. e; y- A1 p. }9 [5 l
2008-01-18 00:22:02 | 但丁 | 2! @& ~+ ~, R" h8 t! p; c" e7 V# |

9 c2 q/ v' ^0 ~- P  F0 o+ l點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
$ C: h  K) Z4 _! o- I. XFilename: DSC01158.JPG
! L# E1 E9 R/ _  Z$ V% ?" [9 v; vDatetime | Downloaded by | Counts  r) x3 V  T  o
2008-01-18 00:25:24 | 阿感 | 2* O) o& N* h" C; D4 Y
2008-01-18 00:24:20 | playbr2 | 2
7 N2 I6 R0 k# j9 I( ~' P2008-01-18 00:22:02 | 但丁 | 2
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5 T* U0 l+ H/ t& z- |# R+ {點解大家都down兩次? XD

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, o  w! K% _0 r5 \2 H5 \我第一次開睇左2秒就close 左  D7 K" F! P# ~( ?
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:6 G" A) Y8 o$ D8 T
Filename: DSC01158.JPG- O5 \9 m3 W! x/ D3 k' ]
Datetime | Downloaded by | Counts
  A6 C1 L9 h" w& R8 q2008-01-18 00:25:24 | 阿感 | 2
" \% T8 n4 r( K2008-01-18 00:24:20 | playbr2 | 2( j/ U1 I# z2 K6 l1 B4 v5 c
2008-01-18 00:22:02 | 但丁 | 2
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; {( y) Q7 j+ n# V點解大家都down兩次? XD

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快d捉我錯處
' r- `7 T, _/ j/ @話吾定我都打錯 + - 符號
* t) W7 d% k% ?! m係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當+ g& H* N) A! M
不過,c=101n哥度(解除n係正整數的限制,只是整數), E# g* ]7 z4 x6 A+ }6 T4 x/ ]  y6 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~)
9 r( y7 R5 J/ |/ d- M知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題/ [- @, y. ?4 Z4 M! |
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
2 v2 S0 b; |, e4 v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
6 D3 M& {8 W$ D" u* 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....
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% J6 v6 L1 v: k5 s2 B) m/ k/ |9 x, T2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:$ ^' ~6 L4 W2 _  Q% f# j+ T
冇答案ga....
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9 i1 \1 R7 b5 ^4 J* d2條equation solve 唔到3個unknown ga....

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2 equations 2 unknows
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if 3 unknows there should be 3 equations
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* K' f% x8 p3 m/ hmake it simple
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say
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a + b +c = 3- T. u' u% u6 b

5 K+ w- U. F3 j. m- G! la+b = 2! ^9 m0 v; ~1 M0 d7 q
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then c is 1 0 j% n" C3 l8 |+ B
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a = 2 - b ! X+ y) u6 M: P, J+ q6 C

9 \" `! O+ n( Tso 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
3 @8 ]0 j2 B0 W9 Q冇答案ga....- N" J! z9 {4 j3 Q; n. G
+ `1 h+ p. Z0 L0 ^
2條equation solve 唔到3個unknown ga....

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# X0 J0 [& ]% f1 u7 N( F此言差矣~+ F' @0 E" I9 V8 H2 O
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2條equation solve 唔到3個unknown ga% t% `6 L7 @1 ~, l) M; z- v
還欠一個條件,就是3條equation都是linear independent(線性無關)的, V, M# h8 M7 ?+ j  q
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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
$ U' }) ]1 w; i7 @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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1 F( ~8 Q: a* E* Y6 P! \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~)* _4 [: C/ k% ~4 j0 P; `4 m" U. Z
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
2 H) }% \9 e$ k有興趣就解解看: O# ~0 F& K9 `
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:' U( j8 X3 b5 F$ ^) i$ Q
捉錯處就唔敢當
0 r1 q- y( q4 m# 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3 X: W3 k2 w6 B" h) z3 s' L! ?1 M
反而適當地調節一下 , 咁會理性好多" O; }2 P5 l1 U2 L$ t8 q
就好似隻game 由12粒珠 加到13粒珠咁1 h: u1 O' A+ F; j* G  W$ N
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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p.s. 求''堂''字正寫...

5 N: ]  V( {- N' P/ x# Z已是正寫吧