sakura310

Filename: DSC01158.JPG
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+ h# B; j, ~% K# e2008-01-18 00:25:24 | 阿感 | 2
; J. l+ N3 n2 T: r5 F: i2008-01-18 00:24:20 | playbr2 | 27 [0 F4 _4 M. k3 G
2008-01-18 00:22:02 | 但丁 | 2( R( k9 [7 \& U" S* T- t* v* L

. ?) @. u8 H* T, M& E9 Y3 d點解大家都down兩次? XD

playbr2

Originally posted by sakura310 at  12:27 AM:' z0 M$ c: t& S9 H8 X2 D$ Y
Filename: DSC01158.JPG6 d9 y8 i# c$ M' d1 {8 p& A
Datetime | Downloaded by | Counts
( c9 P, ~" ~. u% h0 r0 Y' H2008-01-18 00:25:24 | 阿感 | 22 q) h( D( p  w, t  I5 {
2008-01-18 00:24:20 | playbr2 | 2, s) B# s9 u+ L  X" {' D
2008-01-18 00:22:02 | 但丁 | 2
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7 P; T1 _* M3 M: Z/ [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( w3 U; }% k* `1 `
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
1 Q. Q+ V- G' S0 [  n( ~Filename: DSC01158.JPG9 M* ~6 z9 o7 N; ]+ C1 b) e( K
Datetime | Downloaded by | Counts  F4 |: T7 D. x1 E
2008-01-18 00:25:24 | 阿感 | 2
7 j2 c6 b" Q& l2008-01-18 00:24:20 | playbr2 | 2# y( X. |+ ^! y3 D( U1 Z% G
2008-01-18 00:22:02 | 但丁 | 2
: @2 Z5 l) o+ t: ?: y/ t. x5 v) n; i/ U5 [/ N
點解大家都down兩次? XD

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" K4 t& y( s* ]6 O# N快d捉我錯處
* k8 @+ F3 X! s  j0 H話吾定我都打錯 + - 符號% V1 p, r! L" w1 ]3 W
係電腦打答案...的確幾煩...又哂時間...

sakura310

捉錯處就唔敢當
6 I% ]1 G. R/ E" T不過,c=101n哥度(解除n係正整數的限制,只是整數)
3 t1 [  J' s  J1 O3 t' d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~)
2 t% e( i8 F5 V) M: M5 c知道{101,0,0}和{5151,2550,5050}係答案的話,當然沒問題
( J* ^4 C( O/ J5 s$ U' i但原先是不知答案,所以唔知有無失根3 d+ s$ V8 y& T, `* W8 f% H# g3 a. n! k

+ k# S3 m1 j# J/ L7 ?5 M' i8 {有時見到題目都感到有點不爽0 u+ k; O/ M6 E
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
9 N& Y. v, v5 z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....  w' [" q$ {+ a, l7 ?* b

+ ]/ V8 a0 e( e2條equation solve 唔到3個unknown ga....

Azuma

Originally posted by cutec at 2008-1-18 08:26 AM:
. H) V$ o& i/ s0 _% Q6 d冇答案ga....
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2條equation solve 唔到3個unknown ga....

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4 ~* l. i! N8 Y* i4 [, Q! lagree
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2 equations 2 unknows
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if 3 unknows there should be 3 equations
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" N2 f" P/ R& x% U7 Gmake it simple ( @* o4 b1 b$ N! }0 C0 d; s

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a + b +c = 3' r# f* s& H& O/ E* G/ |# y

3 C5 j" K8 O! n" S; wa+b = 2
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then c is 1 ; h6 v- Y2 {+ Y: Y3 G( d
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a = 2 - b
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so 0 = 0
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sakura310

Originally posted by cutec at 2008-1-18 08:26 AM:
. @  n" S" ^, I) ~冇答案ga....
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: v' i" u& E8 R7 a' J! n: @2條equation solve 唔到3個unknown ga....

$ A$ |* S# F2 G7 d2 c* d
3 |! D5 P% C7 `3 B% S此言差矣~) N7 \  E2 q) K/ E

: u# M, w" U0 e0 {2條equation solve 唔到3個unknown ga, K7 j+ [& ]5 R0 R. C2 x
還欠一個條件,就是3條equation都是linear independent(線性無關)的0 S- g" H, t6 d. v, b3 q1 z

. r8 N. s) }- y! y! n5 s( _簡單點說,多元一次方程就是線性方程的一個例子# g  L5 q3 G, E- z' j) f. Z
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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7 k3 t: @3 E. S% P+ m2 [  G! [) M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~)) Y4 V- E' T3 b+ W0 p3 T
例如 x^2-2(x+8y)+17+4y^2+z^0.5=0 就只有唯一整數解  @1 d5 v' J; w  [6 c+ N8 F7 O) y
有興趣就解解看: N$ f5 R; m* P, m3 I6 @6 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:
* a5 U! Q( |0 m& k$ i: t* E, H捉錯處就唔敢當; n' D3 u' e# N( N6 u% i, B) l
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 Z. s! N& T$ p" f! {0 r4 D0 H5 N5 l9 a反而適當地調節一下 , 咁會理性好多3 G# [+ Y7 E# v8 U
就好似隻game 由12粒珠 加到13粒珠咁
6 K  M2 w1 N; d( d6 H" i" i當''堂''好玩哂7 y: d$ o- o- n4 T3 I' N7 r; n3 Y

: n# x" B8 T( w8 z. Ep.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...

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已是正寫吧