playbr2

Originally posted by sakura310 at  09:58 PM:
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) q8 c. Y, U  o5 B) [* b對不起* q5 Z6 ^# K" s* J% ?0 V
請容許我指出錯誤3 C" B% N" P: x8 e* C

8 ^( E1 O4 `% R; N1 }. b) a在...

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咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:
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" Y% T" b8 B, Q; Splayplay你串我?:fig...

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乜咁快手ㄚㄚㄚㄚ0 x  w% x* y6 ~9 G6 e" h
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個答案可以咁.....
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1.ab+bc-ac=0+ i1 n* S& c0 G3 o* [# I( K* \
a-c=101
! u; P* F6 d! _$ \b=ac/(a+c)=(101c+c^2)/(101+2c), G% ]6 S9 d/ o
設c=101n
0 H6 ?! L7 ~) N# N  f5 n101n代入c
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, R: P" r. r3 }3 J( N% a[101^2*n+(101n)^2]/(101+202n)- D) ]5 z* D; L' U( l4 E. N
=[(101^2)n(n+1)]/[(101)(2n+1)]% F% `4 l- I  I
=[101n(n+1)]/(2n+1)
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4 S: U# f' Z  ^% [- b因為a、b、c是正整數3 t( u0 S2 Y3 c$ X
所以n是正整數
0 z: h+ G! F2 v3 K所以[101n(n+1)]/(2n+1)是整數
1 Q) _! m7 B  P& u" H2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)
7 R0 Y- g& _% g& C; ]! Jn=502 w" ^1 O( P) }% A
a=5151  <--a-c=101
1 l3 W8 x) [6 G; K5 f$ A& j+ db=2550  <--[101n(n+1)]/(2n+1)
& M. ^, C4 K  uc=5050  <--c=101n
6 J! ]* p% v6 R; Q: d答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:' {) X  `$ j) F" V  ^; H
Filename: DSC01158.JPG
3 n3 ]2 M, s" V7 Y! }Datetime | Downloaded by | Counts
3 k7 X8 S& \+ v4 _; V6 L- s2008-01-18 00:25:24 | 阿感 | 28 s) I7 c0 V1 |
2008-01-18 00:24:20 | playbr2 | 2
8 ^5 H( N. m! o2008-01-18 00:22:02 | 但丁 | 2. B% U6 |! c3 J0 `9 X$ P2 |1 k" _
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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
2 Z& s6 B5 z0 R9 R4 I$ d, l4 K8 p之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
* f7 u0 m5 w6 J" X8 sFilename: DSC01158.JPG
; m% y, _( ?: oDatetime | Downloaded by | Counts! ?( \' U- t2 {! }! H3 C
2008-01-18 00:25:24 | 阿感 | 2: }/ C0 H6 X0 z) ~2 D4 @  T
2008-01-18 00:24:20 | playbr2 | 2
: O( Q4 D/ {1 _' i2008-01-18 00:22:02 | 但丁 | 25 ~; p( \& O# @2 [' X

, X( a- w- K5 R0 d3 S/ ]& V點解大家都down兩次? XD

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快d捉我錯處
3 s# W" I$ E' U) |5 y話吾定我都打錯 + - 符號
, x6 v+ ?" y! k# l4 ^係電腦打答案...的確幾煩...又哂時間...

playbr2

Originally posted by sakura310 at  10:22 AM:1 V. F* l6 v6 B7 R3 D
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; w: [# z' R3 ?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:, [! q' t3 f# Y; u* Y& P( `4 Y/ ^
捉錯處就唔敢當
9 |' p# b" N/ x4 Y4 D+ o( m- H不過,c=101n哥度(解...

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- `" s8 N  |! i# \% \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
6 _9 C3 C" {$ X( _反而適當地調節一下 , 咁會理性好多
/ C8 p7 d- n3 q8 T# Q就好似隻game 由12粒珠 加到13粒珠咁
: f# p( C3 o4 R2 b" ~當''堂''好玩哂
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; G$ _* _! M: J. Ap.s. 求''堂''字正寫