playbr2

Originally posted by sakura310 at  09:58 PM:
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對不起& m% S: [6 ?$ u. ~' I
請容許我指出錯誤, o3 F' V! X; d3 e& }/ ]4 p+ R

( F, w# v. u$ `在...

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咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:; O0 o+ s! _: q! f, u
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* X1 u) V" `3 M0 q% ?playplay你串我?:fig...

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乜咁快手ㄚㄚㄚㄚ9 _& x& F' K, p4 R/ g! m/ a) p2 j9 R
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個答案可以咁.....1 e0 d! o, f2 w& J+ O

0 N; a) s- K3 @! C# T# O! f6 |1.ab+bc-ac=0! U' O2 Z7 C  `& U5 X
a-c=1016 ]4 y; Z- N* z- C/ F7 W4 _. v
b=ac/(a+c)=(101c+c^2)/(101+2c)
$ G( I) ~, Y4 c- o+ ]" A4 y設c=101n
$ R# O  P! h# o2 I* J101n代入c
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# u" I$ |0 _( q  |- F[101^2*n+(101n)^2]/(101+202n)
" }" ~, z' L: ~% C$ L& Y=[(101^2)n(n+1)]/[(101)(2n+1)]# \- c4 G" c& U
=[101n(n+1)]/(2n+1)3 x/ L( f7 S' E7 V) e' Q
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因為a、b、c是正整數" T4 A' u; Z5 _* e
所以n是正整數9 i/ v: w* n3 U  T9 g
所以[101n(n+1)]/(2n+1)是整數+ u# W0 K( e  y7 Q/ G+ c) e: B
2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)
! ]) C' C( |. ~n=501 o0 b% i  F. I8 L
a=5151  <--a-c=101
4 _( |  M) P6 t% Kb=2550  <--[101n(n+1)]/(2n+1)& H# k5 S" B* Q: O
c=5050  <--c=101n
$ p* D' ^# T5 z0 u% \1 }  I$ y答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:: s- y, }  M) l/ `( E& Y* G
Filename: DSC01158.JPG# S& e% Y. L4 ~( w) u+ o
Datetime | Downloaded by | Counts
6 |4 C3 u/ ~( V& f: d/ y0 V7 d4 E2008-01-18 00:25:24 | 阿感 | 2
1 f8 ~  k: `% |: c# E+ C1 x2008-01-18 00:24:20 | playbr2 | 28 u/ J3 x1 I5 K% O5 h2 y" t; }
2008-01-18 00:22:02 | 但丁 | 2
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點解大家都down兩次? XD

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我第一次開睇左2秒就close 左
; M& |! ?$ h0 E9 {之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:2 p; ?, Z2 R7 o- `* }$ d
Filename: DSC01158.JPG
  T/ o# _9 `9 C. X9 oDatetime | Downloaded by | Counts2 y/ s8 E- I, n5 p8 Q
2008-01-18 00:25:24 | 阿感 | 2
- f2 J4 a/ q; P9 h) \- i  S/ ~9 g2008-01-18 00:24:20 | playbr2 | 2: K! f: s6 ?- q+ i  m" Z- i7 D' `
2008-01-18 00:22:02 | 但丁 | 2, }; Y1 v0 f; e% u3 a: D$ S3 G3 C- j
* |4 k: G3 X4 [+ a1 ]
點解大家都down兩次? XD

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快d捉我錯處
7 F8 ~6 W/ x2 G- t/ p2 V話吾定我都打錯 + - 符號
) u; o$ ^1 S& n( i係電腦打答案...的確幾煩...又哂時間...

playbr2

Originally posted by sakura310 at  10:22 AM:" B5 j/ F# B( e6 h# B4 ?, l# d0 D

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7 ^9 ^0 t/ h& a3 o* u( `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) O. h, w捉錯處就唔敢當5 Y& f- S6 n1 ?/ Z$ n2 V
不過,c=101n哥度(解...

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* ?; G# X5 l  A1 p1 h/ G' l; u0 x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
; M& P6 V% b% G* O7 u反而適當地調節一下 , 咁會理性好多
( C" u7 |: B) K2 Z  g  e& k就好似隻game 由12粒珠 加到13粒珠咁
4 @. j9 M. s4 p* ]( `' W1 b當''堂''好玩哂' Z  A0 U7 d- G! g! y

( y, c1 S9 u, S& np.s. 求''堂''字正寫