playbr2

Originally posted by sakura310 at  09:58 PM:
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對不起% x- K4 ?, o2 x, T+ t
請容許我指出錯誤
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在...

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0 s# \! b' B, f0 r# l$ A- i1 v6 R- S咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:' k1 {6 c+ s$ U7 F- `( ~: e% [0 l

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) i# I' u% h' b! ?0 f  M1 Xplayplay你串我?:fig...

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+ Y( n1 y( q3 X* }& l$ F乜咁快手ㄚㄚㄚㄚ6 w/ s& Q, k" r1 f, }# w
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個答案可以咁.....
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5 w& p& D8 @: [( M  m1.ab+bc-ac=0
, u& {* g* H6 g9 K! e& sa-c=101
8 C8 m8 R: E7 Ib=ac/(a+c)=(101c+c^2)/(101+2c): ?+ E* k( [: a6 [! B# I7 A9 M: ~
設c=101n* V+ k0 P8 s# s# F9 ^* |
101n代入c. D+ A) q) H# P. w5 H- T
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[101^2*n+(101n)^2]/(101+202n)7 F4 l. o& C% L0 p, v& C
=[(101^2)n(n+1)]/[(101)(2n+1)]2 {; R2 Y6 _. f7 M+ Y
=[101n(n+1)]/(2n+1)5 ]! G% o# |  V6 F% Y& X8 {! C$ f8 O
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因為a、b、c是正整數
, m& t  K! Z6 B4 K' z' ]所以n是正整數4 G$ X9 q% s7 K. `$ w; Y
所以[101n(n+1)]/(2n+1)是整數
8 w) p4 K3 A; @4 ^* ]/ o! B; {2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解); t% {6 F) P* [; X9 c: ^
n=50
1 K/ |6 `7 E* k( A; s/ ba=5151  <--a-c=101
8 u" ~; B, ^$ s2 h+ qb=2550  <--[101n(n+1)]/(2n+1)! i! r  a9 s' L& b8 I
c=5050  <--c=101n, D2 Q7 ?. C' w0 y- K& H
答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:( l" u3 A) A' g! s
Filename: DSC01158.JPG) G$ n% o( [0 z4 _
Datetime | Downloaded by | Counts
  s- }# L( ?9 z2008-01-18 00:25:24 | 阿感 | 24 K5 G+ P& R" f# k) E
2008-01-18 00:24:20 | playbr2 | 2; G7 V8 A# y9 w4 t
2008-01-18 00:22:02 | 但丁 | 2" ^+ o; A/ {6 i" Y: \2 b4 S; C

5 k8 X% F  z- h# Z點解大家都down兩次? XD

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1 F, z- K; [. ?( ~( e我第一次開睇左2秒就close 左+ X0 B: H1 k4 y. H3 w
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:3 Q4 x  z, ]0 Z# ~6 H0 X- |, f
Filename: DSC01158.JPG
! ]9 J; w8 P( f, s. G/ J5 }Datetime | Downloaded by | Counts7 X/ f3 V% j( z6 j% ~
2008-01-18 00:25:24 | 阿感 | 2. C& X6 A0 @- ^% C  _: e8 J
2008-01-18 00:24:20 | playbr2 | 2
5 m# A3 `8 V  ?; u' s6 Z# _( O2008-01-18 00:22:02 | 但丁 | 2
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- n3 y$ w4 H, ]- e) ~* R6 E點解大家都down兩次? XD

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快d捉我錯處
  P5 X( ]: ~( ~. Y0 U話吾定我都打錯 + - 符號
( T+ C6 R& V7 G4 m6 G# h! W係電腦打答案...的確幾煩...又哂時間...

playbr2

Originally posted by sakura310 at  10:22 AM:3 ?8 r8 Y1 I& b" Z; I3 K1 R
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6 A" f5 U1 k# R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:
7 H, K4 \( [- Y, x; s捉錯處就唔敢當3 R; b+ g" q6 r( M: U- t
不過,c=101n哥度(解...

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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& w. b+ L. A+ X
反而適當地調節一下 , 咁會理性好多
5 T& K0 @, a2 o6 q' J* S就好似隻game 由12粒珠 加到13粒珠咁
6 A2 X) Z9 ^. D9 a當''堂''好玩哂
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  Q" n% e% m# c4 s' j- Np.s. 求''堂''字正寫