playbr2

Originally posted by sakura310 at  09:58 PM:( J% H7 e9 W  _! ]

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對不起
& i- U5 a3 C& J3 K請容許我指出錯誤
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5 {- `6 }; E- |# G& U6 v$ R! |+ U在...

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' u5 N7 V: C1 ?! e咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:( E( ?1 p( q& E2 ~

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playplay你串我?:fig...

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* [% `  Z6 u9 {, B6 }2 w乜咁快手ㄚㄚㄚㄚ
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! b" x" G: f: W4 t  w6 L, T* u個答案可以咁.....
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: \  K5 b# J1 w! U0 [6 i" [7 \4 d1.ab+bc-ac=0  l5 y+ d' }& H# J( w
a-c=101% V2 v, Y" ^2 W4 ]
b=ac/(a+c)=(101c+c^2)/(101+2c)6 T) z) C' C; J/ n
設c=101n. s9 G3 j; `; H, ?7 D& |
101n代入c
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[101^2*n+(101n)^2]/(101+202n)! Y" N; O$ q" ^+ a
=[(101^2)n(n+1)]/[(101)(2n+1)]. X7 [# Q5 f* E+ D4 n& a
=[101n(n+1)]/(2n+1)8 B9 d. g% B6 a7 c
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因為a、b、c是正整數
) d/ j* b# p* C1 a$ ]所以n是正整數- \" z+ O3 \9 C- ~6 s+ K' r
所以[101n(n+1)]/(2n+1)是整數
0 s# G: L5 J  @+ V! j# u% e2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)+ f, k: r/ A; P2 u  f' k
n=50
5 I1 G& k9 }8 g( |% j+ i. ha=5151  <--a-c=101
( T# a4 R, u# v7 E$ D) b0 B0 Zb=2550  <--[101n(n+1)]/(2n+1)6 N# N. n- G+ Q* S0 k
c=5050  <--c=101n
7 M1 M8 G9 [' ]答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:% c. L% _4 {+ `/ }6 L' W
Filename: DSC01158.JPG/ L* o+ r& x) y3 C( M* O
Datetime | Downloaded by | Counts
3 R, w% t4 y8 A9 c# w# a2008-01-18 00:25:24 | 阿感 | 2, V" m- G+ N. k6 M& T. n) v
2008-01-18 00:24:20 | playbr2 | 2
7 \. A  A  e6 Q# u/ _4 S2008-01-18 00:22:02 | 但丁 | 2
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點解大家都down兩次? XD

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  t4 j6 q9 O9 u* [6 r! [我第一次開睇左2秒就close 左
0 z, K* G6 _) c2 f- g/ K8 ^1 }; x2 j之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
" g! C* c! X2 x  zFilename: DSC01158.JPG( |4 O# F% w! y6 f5 C0 A
Datetime | Downloaded by | Counts3 d2 u8 j6 D' X* M$ i
2008-01-18 00:25:24 | 阿感 | 2+ O; y1 O' I5 r: d$ t
2008-01-18 00:24:20 | playbr2 | 2
7 o$ s, q+ s0 `2 z" o2008-01-18 00:22:02 | 但丁 | 2
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點解大家都down兩次? XD

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4 N# R  s0 `" l8 K# w, T9 h7 }( @; t快d捉我錯處& r% }; |7 R7 y. d6 ]
話吾定我都打錯 + - 符號
2 H% K! ?) T5 Z( @係電腦打答案...的確幾煩...又哂時間...

playbr2

Originally posted by sakura310 at  10:22 AM:" x) J! G% q6 x* [9 V4 u' Z- v
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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:% G% V- ~* A! `9 @
捉錯處就唔敢當
$ E5 A% Q; i/ }" b$ O不過,c=101n哥度(解...

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3 I$ v1 ~, @, m6 p! `* v; g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
, t/ B! U5 o+ B' @反而適當地調節一下 , 咁會理性好多
  F2 z! b6 z% y5 Z3 N: L就好似隻game 由12粒珠 加到13粒珠咁, J6 S& W+ o$ F2 c- d) v; i
當''堂''好玩哂7 \. ^6 m+ K- ]0 }0 C
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p.s. 求''堂''字正寫