sakura310

Filename: DSC01158.JPG
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2008-01-18 00:25:24 | 阿感 | 2& B) o. Y: ^% p. y2 N
2008-01-18 00:24:20 | playbr2 | 2, r0 ?! C. i/ b5 n3 g; \
2008-01-18 00:22:02 | 但丁 | 2& p* k7 t; [% a9 F% c
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點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:
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Datetime | Downloaded by | Counts& U& F& L4 W" `3 Q& I
2008-01-18 00:25:24 | 阿感 | 2
: x" H0 E; v% ~0 L2 r4 m2008-01-18 00:24:20 | playbr2 | 26 g' `9 m4 _9 @! r7 P9 [4 j9 H
2008-01-18 00:22:02 | 但丁 | 2+ r% e& X# Q; K  g1 S

  t# s, h) D3 J5 ^1 O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  z: E$ d4 ~) w
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:$ D6 f- k8 J2 g$ I
Filename: DSC01158.JPG
; R1 u( z" l5 g+ Y6 G7 b2 f( KDatetime | Downloaded by | Counts
' w2 m* Z( e% V- `9 `4 J2008-01-18 00:25:24 | 阿感 | 2( ~7 O# M+ i& B* j) C/ ?- I
2008-01-18 00:24:20 | playbr2 | 2
5 z1 V: u6 V6 j9 |" y+ d, W  W! Z7 P2008-01-18 00:22:02 | 但丁 | 2$ N9 O  r0 S4 u: Z2 e  ^& y# J5 ~9 g( t; S
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點解大家都down兩次? XD

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  ?) S5 q0 ]- i4 T; t( X1 A  X快d捉我錯處' U& e3 i+ h# q. G) r6 A* d+ e$ K
話吾定我都打錯 + - 符號/ _9 F. R7 t7 N1 a
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
; C9 {$ N1 |' {  W7 D3 Q. R不過,c=101n哥度(解除n係正整數的限制,只是整數)
" D( |$ G% B, d3 ^4 L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~)' |$ P9 K4 _: X0 N3 a; V$ \
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題4 l0 K& e- x# z2 M" u
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4 C1 M  G* V9 d9 N2 f* }" D
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
+ L0 l0 O3 O. i" H1 W: X* Q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....: M3 X  v/ d1 Z+ N" `  V8 E
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2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:9 U4 {# ^& Z, T5 G$ I$ f  I
冇答案ga....
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2條equation solve 唔到3個unknown ga....

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agree ( `" @% {0 E6 ~9 Q

- Y/ l) R2 Q1 Q4 @2 equations 2 unknows
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1 M1 i7 _5 }' v4 Mif 3 unknows there should be 3 equations
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make it simple 5 L3 y" _) ?% K# s- N0 j' ^  G
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say
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a + b +c = 3
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a+b = 2% w$ @  c: P) I7 y4 b
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then c is 1 . V+ S  ~  j. J( d! ]5 A& \. X
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a = 2 - b
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so 0 = 0 # `! Y! c) y2 }6 S, i0 x5 `$ }
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
; K" T* j$ x1 a+ f冇答案ga....
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3 H  B2 F1 G2 T  F$ X2條equation solve 唔到3個unknown ga....

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" O2 Y* j% i; o/ O6 c, g9 s此言差矣~
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9 n: }* C* m* O0 z' x2條equation solve 唔到3個unknown ga
- H5 t7 @, r* _% m# \還欠一個條件,就是3條equation都是linear independent(線性無關)的# {; M, V) Z( B8 n" T. r
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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
& ~8 W' j, Q; p0 b7 m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$ N: v1 a- _3 k. D. f' M9 N
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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~)1 o2 n' s* j" @8 q: a/ R2 S7 {( G
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解
, ]$ W! ]9 B2 K/ Q3 A$ e有興趣就解解看9 U5 Z( I6 h+ W/ S. g
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:# o1 n$ O, p; p+ w
捉錯處就唔敢當
# x$ n5 N' E( F2 Q# J* g& t/ 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. ^0 [; D) M9 A) q( M
反而適當地調節一下 , 咁會理性好多5 l6 _6 B0 _+ T0 {# D- Y
就好似隻game 由12粒珠 加到13粒珠咁
% F/ k& Z5 k3 c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...

+ ~2 C/ s, ?( ?0 x已是正寫吧