sakura310

Filename: DSC01158.JPG
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2 G+ o5 C2 Q' w! y! c2008-01-18 00:25:24 | 阿感 | 2: `* a- v# S- A- i! v# F9 ^+ S
2008-01-18 00:24:20 | playbr2 | 2
/ [% {" `+ h/ G5 a2008-01-18 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:
: o' ~) |0 ]/ P2 D. a4 t3 iFilename: DSC01158.JPG" H& i* d  L2 ^+ u
Datetime | Downloaded by | Counts
' G" d* f2 u" A2008-01-18 00:25:24 | 阿感 | 2
$ L7 C' x; s0 Z/ y. ~  d2008-01-18 00:24:20 | playbr2 | 2
, w. ], m! j4 O5 T" U$ r1 ]& d/ m' L2008-01-18 00:22:02 | 但丁 | 2
  S+ r/ h( G0 Q3 b* c' J- f( Z$ F4 V# q2 B) u+ L/ p
點解大家都down兩次? XD

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我第一次開睇左2秒就close 左
1 F5 ?6 e! a$ H/ A之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:1 T8 l4 g1 k  L' H- i
Filename: DSC01158.JPG
& k- J9 y4 N( BDatetime | Downloaded by | Counts
  K2 I0 Q/ e8 Q6 ~1 i; ^2008-01-18 00:25:24 | 阿感 | 2
5 B4 n- |5 T8 ^% C2008-01-18 00:24:20 | playbr2 | 2
; \5 J' N1 t6 L2 p9 L2008-01-18 00:22:02 | 但丁 | 2, J% @4 {. h! c. w/ I4 Q

4 \8 S; X, v& V* y6 W3 n. o1 @點解大家都down兩次? XD

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快d捉我錯處
$ \/ ?% X- m1 C話吾定我都打錯 + - 符號  m  k5 t) _1 g$ X" H6 ^' w
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
6 y0 S4 r# C1 R& r, N! n- u不過,c=101n哥度(解除n係正整數的限制,只是整數)
% l& e" m3 c6 c& _- Q) h* `7 P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~)
. g- g2 E, e0 r知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題* G4 F# b' j3 a% X' x  X4 g' M
但原先是不知答案,所以唔知有無失根2 f0 r; \1 Z" M

( w6 q9 @5 R0 e, z. m* Z0 ~2 O有時見到題目都感到有點不爽5 k/ u: ^4 A' z( d/ Z+ 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. a% o6 Q8 a+ y- Y# Q2 K1 i/ D
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....1 G' P  V9 o$ z! X) @7 ~4 @

8 b3 C" m8 ?; W; s! _5 P2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
  W" H) P8 N2 z+ c* n- i( e冇答案ga....
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2條equation solve 唔到3個unknown ga....

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2 equations 2 unknows8 ?- Y" b1 g: X( U

1 a( W3 ]" P) b5 g' S9 b( N$ e. Kif 3 unknows there should be 3 equations ; k6 U7 S$ j$ C, T

- `# R2 u: h6 b: @. Z, y, Vmake it simple
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a + b +c = 3
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a+b = 2: Z6 V) \0 M* A/ E2 U. E. s* _
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then c is 1
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4 p" y3 z/ f6 y- v5 wa = 2 - b - D5 d2 q0 s# C1 ^: g" `% A% j0 c

0 m$ D! o6 x; V% rso 0 = 0 % m* O" F' l" Q6 {3 k

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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
: s1 g+ L$ |* l+ I0 a冇答案ga....
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2條equation solve 唔到3個unknown ga....

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* X% j/ G7 B7 ^4 o: X" M( t; s1 t此言差矣~
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2條equation solve 唔到3個unknown ga
7 |3 \  k+ }3 {0 I3 S) [* e; |: C還欠一個條件,就是3條equation都是linear independent(線性無關)的1 R2 j- D( I% z7 J9 m0 H0 F
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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" v) e& c3 \' ]/ R% `$ }% X
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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9 \+ |& \& L6 U* j4 K. |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~)1 I4 E, R- l' k; |1 D: c, o
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解! v" E) I( j# T7 ?7 o
有興趣就解解看' L& M, x  z) [7 K
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:
3 k, x, \" c6 L* n4 \. a* N; F* p捉錯處就唔敢當) W8 L9 U# \5 O2 i
不過,c=101n哥度(解...

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: o$ }( b. D  k! z+ T% g1 A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 O: x% n4 [0 }- O反而適當地調節一下 , 咁會理性好多4 T! v8 e0 T. N, l% Q
就好似隻game 由12粒珠 加到13粒珠咁
% |$ x8 x6 g! R  z- f8 o% W. E' N3 U當''堂''好玩哂$ R3 R% g: \: X. d% f
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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...

$ \: H, _1 w7 g* i) j已是正寫吧