playbr2

Originally posted by sakura310 at  09:58 PM:
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對不起
& @1 X  R8 X* U/ V( {3 ~1 s% U0 W請容許我指出錯誤2 ~8 w% P2 i/ P9 y7 ]
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在...

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/ }8 G5 w; x8 Y9 |* F咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:  q4 ?/ E1 i1 m/ Z; b0 C& L2 {0 ^
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playplay你串我?:fig...

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乜咁快手ㄚㄚㄚㄚ! h# M- m8 }) b7 n* G7 R

  [5 F/ ^4 D. b6 ?5 Q* X* g2 S個答案可以咁.....4 G1 B% F0 b2 I8 I$ D5 R: U/ E
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1.ab+bc-ac=0- \# Z: v  B+ q) m2 C, M5 \
a-c=101" D+ i+ [! [8 L" w5 B( m* W
b=ac/(a+c)=(101c+c^2)/(101+2c)3 S( W! R$ }; S9 p
設c=101n+ a: H: V% Q& H
101n代入c
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[101^2*n+(101n)^2]/(101+202n)3 H9 e$ n7 h5 Z0 Y1 W
=[(101^2)n(n+1)]/[(101)(2n+1)]' V2 V8 s& C) L! K4 v6 Q8 C. ~: i
=[101n(n+1)]/(2n+1)
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- M% q: l9 p  @. c" i9 ~0 M7 l; c因為a、b、c是正整數, P' F& O1 g  D; P7 L
所以n是正整數
& |/ i( I! w* w所以[101n(n+1)]/(2n+1)是整數" H9 {2 B4 G1 \* ?+ N% i, k- z9 X
2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)& [) Q4 S5 x, w. g
n=50# K, M! M% \% {9 S4 I3 W
a=5151  <--a-c=101, I4 D/ A* p& f$ b9 H2 w7 s# X2 f
b=2550  <--[101n(n+1)]/(2n+1)' m; D7 ~. A7 ?. Y2 Z
c=5050  <--c=101n
2 t* Z- p! t" T5 C9 b3 H) M答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:
5 h2 p% J0 Q- `: J; t! cFilename: DSC01158.JPG
" Z8 p* N; W& O; y( @. u, G" F" kDatetime | Downloaded by | Counts
% x3 @5 ?& a* @& H; P: n" p2008-01-18 00:25:24 | 阿感 | 2
9 f+ o# E/ y- \! O4 _/ g2008-01-18 00:24:20 | playbr2 | 2
: u% W7 c9 T, T4 P% u3 p9 V2008-01-18 00:22:02 | 但丁 | 2
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點解大家都down兩次? XD

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7 {# \. ]/ R4 x5 B5 _/ A我第一次開睇左2秒就close 左
0 O7 u8 Z+ C- ^8 v  N9 ?) `& U; U之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:5 C5 [* R8 G/ N
Filename: DSC01158.JPG
5 ?* b" C: `2 ZDatetime | Downloaded by | Counts
3 K- x  I% @% \4 l+ ]" x* B2008-01-18 00:25:24 | 阿感 | 2
- f% m8 R, {9 c  N; K0 ?2008-01-18 00:24:20 | playbr2 | 2
, {# ~: B& j! b) l5 r& P' v2008-01-18 00:22:02 | 但丁 | 2
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點解大家都down兩次? XD

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快d捉我錯處" z4 H; K( ~! U0 W
話吾定我都打錯 + - 符號
! d- [5 w# C- P4 B, e7 Z4 `* v, y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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4 n- m0 H- [) k+ [# v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:
! ^; E. Q9 D& L! Y8 w4 r4 F捉錯處就唔敢當
) x! A# N) m* h: A不過,c=101n哥度(解...

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7 W8 }  E5 z$ d: t2 K2 o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! N# s; v# ~; j8 b
反而適當地調節一下 , 咁會理性好多  m! G9 u+ k8 {2 _1 o- q
就好似隻game 由12粒珠 加到13粒珠咁
* B3 t7 N/ p1 Z! \3 c當''堂''好玩哂
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p.s. 求''堂''字正寫