playbr2

Originally posted by sakura310 at  09:58 PM:
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5 g5 c& K" @' ]1 B對不起; G; s- `- @+ j; A
請容許我指出錯誤
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, P+ M- j" i, R/ d" {# m$ K  _! B在...

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咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:
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playplay你串我?:fig...

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- S! S5 @$ k% I" N7 ?+ i/ a乜咁快手ㄚㄚㄚㄚ
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& @* A$ U! J( [; N0 f8 i* F個答案可以咁.....
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5 Q8 K/ [7 d& |  c1.ab+bc-ac=0# [1 }1 d# N) W% A* Y5 |, E3 M( X7 e
a-c=101) \3 K# V) T0 I
b=ac/(a+c)=(101c+c^2)/(101+2c)
! z! x1 @# T" j( T2 Q% H設c=101n
9 O$ I- t+ `. ~1 K6 B/ o101n代入c
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[101^2*n+(101n)^2]/(101+202n)
. i# U# a( v% k) Y" [=[(101^2)n(n+1)]/[(101)(2n+1)]; M! p1 R$ c6 ~: _
=[101n(n+1)]/(2n+1)
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因為a、b、c是正整數
3 m# H( }# f. S$ }/ l, S" ?所以n是正整數
" u5 M& ?3 q5 l8 J  O所以[101n(n+1)]/(2n+1)是整數
, f2 O1 G0 B1 s/ @" [' y% ]4 q( `2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)5 M: D3 Q+ }$ V0 Y9 K) O6 b
n=50
5 Z& q$ r* k2 i: j3 n4 _% s' v) Xa=5151  <--a-c=101
. n" B' H$ n* i; R( fb=2550  <--[101n(n+1)]/(2n+1), R- g& O4 B9 m+ ~; o% n
c=5050  <--c=101n
$ v7 h& R8 h. x' r# s; h, A答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:
7 f; d# G+ W) F6 NFilename: DSC01158.JPG
" e  ]  \4 W. t/ Q" z" U7 k% UDatetime | Downloaded by | Counts
. a- M& a- h" w/ X! u2008-01-18 00:25:24 | 阿感 | 2; w/ z. X; J0 B- l7 w8 o
2008-01-18 00:24:20 | playbr2 | 2: N6 m0 {/ y; d3 X
2008-01-18 00:22:02 | 但丁 | 2: [7 o& Y; J& D, h

+ ~  B0 }& ^/ s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
6 }2 ?6 Y/ j3 A. {! I之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
/ i" h% F, M+ s& yFilename: DSC01158.JPG
0 O$ `' \$ }/ NDatetime | Downloaded by | Counts* i. H; d7 k6 q' s) V' H
2008-01-18 00:25:24 | 阿感 | 20 y! g4 N% ^9 q9 _( [9 S5 }
2008-01-18 00:24:20 | playbr2 | 2
* G. ?$ }2 e4 t" |% B$ Z2008-01-18 00:22:02 | 但丁 | 2
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* K; Q( |4 Z6 D4 ]9 Q點解大家都down兩次? XD

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# s4 v2 D  B; m0 o0 n( M- |. x2 f9 f快d捉我錯處
/ ]7 [, W' t2 m8 {! J話吾定我都打錯 + - 符號
6 F) n" {  F8 G- E6 _0 Z係電腦打答案...的確幾煩...又哂時間...

playbr2

Originally posted by sakura310 at  10:22 AM:
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' W9 s# I$ h7 N! `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:/ v  i2 `" c# a# B
捉錯處就唔敢當$ I  f; Y( O# x5 K, ]
不過,c=101n哥度(解...

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  ]3 H& n' o) Y2 M' r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
# p) ^" z+ f! i  u6 ^反而適當地調節一下 , 咁會理性好多9 ?* m8 _5 R: d
就好似隻game 由12粒珠 加到13粒珠咁
0 g  y) j, R2 }1 X. r9 ]! G) H  o當''堂''好玩哂
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p.s. 求''堂''字正寫