sakura310

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; g  P' I; h5 l2008-01-18 00:25:24 | 阿感 | 2
. a% h# Y6 C0 j  f; _2008-01-18 00:24:20 | playbr2 | 23 L8 x- p( W  K  Q) ^
2008-01-18 00:22:02 | 但丁 | 2# K' P5 c% |+ ~. \9 x
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點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:9 j) w9 n0 z2 c
Filename: DSC01158.JPG
1 l# j% x" _) ?9 C! ]Datetime | Downloaded by | Counts! N% v1 M- ?6 N! E% _5 `) P
2008-01-18 00:25:24 | 阿感 | 26 d5 ^" y! X: W7 F/ \; P5 g
2008-01-18 00:24:20 | playbr2 | 26 P4 l2 e, _8 Q7 ], X0 Q( z1 G# p4 r( m
2008-01-18 00:22:02 | 但丁 | 2
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% F. I# M# n5 l5 E' D. q/ R1 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
) Q8 k" x' J6 l+ ~; _之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
+ y" O; H0 u# c- zFilename: DSC01158.JPG$ l5 Y3 y5 n) Z+ [2 |/ y: ~+ O- i
Datetime | Downloaded by | Counts
- `0 i" ~3 d* k2008-01-18 00:25:24 | 阿感 | 2
1 r; `" U  M! x4 ]+ p2008-01-18 00:24:20 | playbr2 | 2
9 ]# F/ W" }  a' `* _2008-01-18 00:22:02 | 但丁 | 2
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  D$ v) _( N2 G3 J0 \# _5 ?點解大家都down兩次? XD

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0 H7 `5 x& C+ J快d捉我錯處$ H* g8 Y- m2 ^" A; Z
話吾定我都打錯 + - 符號! t5 b- l% X+ |* q: ~6 c
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
, M8 q8 h" X4 u不過,c=101n哥度(解除n係正整數的限制,只是整數)
! [" P. N4 l' K  |& 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~)( u7 ]$ n& {* w/ Z' J  e- |
知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
: h0 o: R; \" l0 P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
  y; B6 H2 i+ x; p5 A4 B* w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( B/ ~4 L$ S4 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....9 |% t# g- E# {* f, Y$ [" {* G

9 R4 V+ E: a* Q- [8 w2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
- o0 [$ z% _  n- W+ x, A! G; N冇答案ga....
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0 W+ W" X; }7 h! v/ K3 B) f2條equation solve 唔到3個unknown ga....

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8 ~$ b$ @- K) f2 k& ^& ?agree ; ]* l. }& ^$ A7 `
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2 equations 2 unknows
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if 3 unknows there should be 3 equations - b% _2 K9 m, \

# x! V! y: r4 s* `7 Z' Gmake it simple
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say - X4 r; h3 U2 j) B+ h4 k
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a + b +c = 37 x: ]7 \( h2 R: R% U  T) D

/ {) f$ ?1 ], c2 ja+b = 20 c5 u8 v6 l" k# b' D% j

, Y, D; _; E. a# }then c is 1
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a = 2 - b . N( Z/ ?# T9 x2 M/ u6 a- X

( L2 p6 ~0 W5 _8 [so 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:" ^8 w# ~/ K0 D2 D* j( L; k
冇答案ga....; C+ n6 I$ ^# V6 C

! b5 N' C& A2 ^' R; E+ \2條equation solve 唔到3個unknown ga....

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0 J/ X- {0 Z9 L( X/ {' K1 {5 ~此言差矣~
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2條equation solve 唔到3個unknown ga$ S. _% x# [- ^! z" ~1 r
還欠一個條件,就是3條equation都是linear independent(線性無關)的
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  ]! O/ |! J! E6 E簡單點說,多元一次方程就是線性方程的一個例子
  l2 L- @9 U# F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  f$ l- m; F+ v! ?
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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~). ]* E  @* @2 {
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解& y' G5 W0 a: v+ u# D
有興趣就解解看
$ `" n0 i& n$ v2 s5 ]0 V不懂的話就問playplay,佢會知答案

playbr2

Originally posted by sakura310 at  10:22 AM:5 ?& V$ z* k4 C* J0 c
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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:8 d* b1 x! }6 l
捉錯處就唔敢當
3 Q) |$ \+ C, m' {/ ?. g( B不過,c=101n哥度(解...

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% J! F' M# ^, x- W2 A9 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: W" ?+ h  v$ P0 m
反而適當地調節一下 , 咁會理性好多
8 s3 g8 s7 A) S就好似隻game 由12粒珠 加到13粒珠咁) H8 ]5 H* K+ P2 j
當''堂''好玩哂  s) {6 i2 E  S% g* ]+ x" A
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p.s. 求''堂''字正寫

QuiGonJinn

Originally posted by playbr2 at 2008-1-18 14:57:, D9 h, `' h: ?( S
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p.s. 求''堂''字正寫...

1 X; Z6 w# r0 p9 X  I: C已是正寫吧