playbr2

Originally posted by sakura310 at  09:58 PM:" T! c% _$ P: Q, j3 W0 `

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對不起
/ h# h! _* o  Y請容許我指出錯誤9 H+ t& ~+ V( b8 t) {
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在...

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9 B& X& G% [7 c, E5 S咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:
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* ]$ e. w& F2 ~; z- A2 h$ pplayplay你串我?:fig...

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& M- ?( e: h* m- }+ j1 h4 P乜咁快手ㄚㄚㄚㄚ
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4 V  X+ C, O0 G! P個答案可以咁.....
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1.ab+bc-ac=0
9 |- B' P9 {+ _+ O# }a-c=101
. h- R( l0 s4 R5 @, ~" Rb=ac/(a+c)=(101c+c^2)/(101+2c)
% r6 D" \. i% M$ ^+ T設c=101n" ~' N# l7 u6 ]* N
101n代入c( W1 c; s+ v8 n! _( ?

( N0 y3 D  M3 t# _) T0 D[101^2*n+(101n)^2]/(101+202n)- b1 N/ t1 |2 Z! {5 j# [  _# n
=[(101^2)n(n+1)]/[(101)(2n+1)]
6 @3 u5 Q& [; q: x3 t8 V- m  z=[101n(n+1)]/(2n+1)" a* O+ Q+ t( I2 [* s7 z# r3 e
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因為a、b、c是正整數
$ L4 V+ D7 X$ z  o' L8 x所以n是正整數2 Y4 J1 u; R5 |# e6 r
所以[101n(n+1)]/(2n+1)是整數
# S, r) x4 l% B- x& n8 W2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)
* V  K( G3 z3 {* u7 }( Kn=50; X" O( \  }) r+ y9 u
a=5151  <--a-c=101
( _6 B* Y7 t4 C# tb=2550  <--[101n(n+1)]/(2n+1)
% I+ R5 x+ w9 B9 Zc=5050  <--c=101n* g  V' d7 h# ~2 }4 }; X3 _
答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:# h8 _/ Z; i4 f0 f7 J
Filename: DSC01158.JPG
) D+ P6 R3 I+ k+ |Datetime | Downloaded by | Counts6 j0 O! u& U5 E* p
2008-01-18 00:25:24 | 阿感 | 2" c. c) H8 a# `5 v* ^
2008-01-18 00:24:20 | playbr2 | 25 F1 n* ]& C0 |# o4 h! L
2008-01-18 00:22:02 | 但丁 | 2
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* ?* B5 o& v1 a  R" Z0 O& `點解大家都down兩次? XD

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" J2 G( V; _' S! s我第一次開睇左2秒就close 左. b0 |9 v! J" v7 w0 ^, j0 D
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
! G% U# S5 ?0 q1 r. cFilename: DSC01158.JPG
/ ^  b+ ]3 L( f3 N: W3 h9 [, SDatetime | Downloaded by | Counts
+ e5 U9 C: ~; U9 d% ?2008-01-18 00:25:24 | 阿感 | 2
$ l- P8 T! [' w5 G6 I3 r) g2008-01-18 00:24:20 | playbr2 | 2
9 E0 N+ [- n2 b6 q( P* I2008-01-18 00:22:02 | 但丁 | 28 F% m* N, R" Q+ q5 s

6 L( g7 G( M  _, Y; R$ K點解大家都down兩次? XD

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  k0 M: u+ W# ]4 m2 |9 k& \4 N快d捉我錯處% N0 O4 A+ s9 V  r
話吾定我都打錯 + - 符號
: |, E6 v4 Y% H- S係電腦打答案...的確幾煩...又哂時間...

playbr2

Originally posted by sakura310 at  10:22 AM:, W  u2 H0 I# Q( y- V7 W% O
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. v+ r5 X/ f, Y5 b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:9 w% m$ `0 b( U' V9 C" t
捉錯處就唔敢當
# a+ e' n/ q5 V5 N. l: E3 f不過,c=101n哥度(解...

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; J" X% d, O- R' S; J8 r" w- h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
% G' n& j0 J$ h/ v反而適當地調節一下 , 咁會理性好多
/ w/ Y: Y! D7 q5 c7 B# V就好似隻game 由12粒珠 加到13粒珠咁
/ _0 O( T2 O8 G0 X當''堂''好玩哂
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( J3 X+ @: _, Cp.s. 求''堂''字正寫