playbr2

Originally posted by sakura310 at  09:58 PM:
( s6 l6 i! Z9 }; O! d. n* e  A
  l, J( j/ C' A( I* T2 E
4 y. W. ^" }1 r/ q) u對不起% X: P% I0 |0 M" f+ |4 b
請容許我指出錯誤
8 n# w4 s$ ^4 }. J/ K% ^6 D* Y9 a# N7 }
在...

4 A7 \. T: P& C* x) B+ {1 z, f0 G
' L. Q2 d% v2 w  }  x3 v; r3 L7 w咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:  y% x9 k$ d3 ~/ h8 H! ~7 b
3 K, o# U7 {1 I7 X+ d9 r
7 K4 d* V( K) m8 Y
playplay你串我?:fig...

) z) U- k7 J. Z( ?/ d
7 e" S5 c1 i8 ~" }4 n  k乜咁快手ㄚㄚㄚㄚ  x9 ]* V: l3 `: M9 o$ d
( X8 ^2 W  X  ?3 B2 L3 b  [, p' x
個答案可以咁.....
* l! \; ~8 z1 s1 v; N
( x5 ?- b. e+ [1.ab+bc-ac=08 z1 d) |. Q; [( \; S& A( N
a-c=1014 Z- N  F0 E8 h6 D- m+ [
b=ac/(a+c)=(101c+c^2)/(101+2c)
; H/ E$ L: d! B( G/ x' N( _設c=101n/ E. K& e& P% q
101n代入c
; g5 g# O( _6 Z0 t2 Y0 }: S6 x: s" Y. T
[101^2*n+(101n)^2]/(101+202n)
7 S+ j' u6 |9 W. _7 e: Q! n& L0 s=[(101^2)n(n+1)]/[(101)(2n+1)]
6 L5 w' P# ?  \- j5 ^% Y=[101n(n+1)]/(2n+1)( X/ }9 C1 S6 u  K* R' R+ u7 d2 }+ @1 Q

% ~% V3 K% }: S/ N因為a、b、c是正整數5 h6 h* E* h% T1 l4 T
所以n是正整數. m7 u" D; [! ]& f1 w
所以[101n(n+1)]/(2n+1)是整數
; Z- F0 Z9 \; D% Z; u! ^/ w2 ]# A2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)
# z% }# {) R- H8 mn=505 j7 Z& q+ |; H% o
a=5151  <--a-c=101
% W6 s9 t9 `/ \& p4 sb=2550  <--[101n(n+1)]/(2n+1)- A7 q0 Y+ t1 y: H* W( o: N
c=5050  <--c=101n
; W. v/ M# D! M答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:& d/ F( _" I& O& R
Filename: DSC01158.JPG+ Y. X' G7 _0 h4 p( y( c
Datetime | Downloaded by | Counts( p' _. m9 J$ h. R
2008-01-18 00:25:24 | 阿感 | 2/ h- G- \: \( i
2008-01-18 00:24:20 | playbr2 | 28 [) [4 u( S6 Y+ g! ~, F2 Q
2008-01-18 00:22:02 | 但丁 | 2: S# r, q4 _) m$ I" c

, B* S) P# t) x" z點解大家都down兩次? XD

+ m0 f9 |: U/ F9 ^# p  C! ?8 A6 ^* a  q9 |- H: X: M6 G
我第一次開睇左2秒就close 左
7 @6 B7 [# K) y% A2 M; c1 V9 {4 T之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
7 }7 ?" H* M0 MFilename: DSC01158.JPG1 a+ f. u. d( R" N- S
Datetime | Downloaded by | Counts# e, R- e3 }8 q$ ^. m7 U* R
2008-01-18 00:25:24 | 阿感 | 22 H; s; Q3 c2 [  w7 g  }7 `& \4 X
2008-01-18 00:24:20 | playbr2 | 2% D4 C: g" O3 J
2008-01-18 00:22:02 | 但丁 | 2
( ?* @5 U3 M+ h, J+ J+ @: a- m+ S- @, n) r$ m8 V$ q2 c
點解大家都down兩次? XD

9 Y* `/ a6 {2 `+ N$ P, i

, ~& N' m  t3 N0 b快d捉我錯處+ ~* s! w8 O4 [  y1 y
話吾定我都打錯 + - 符號& }6 y6 [- x8 g  g: E  F2 u9 T
係電腦打答案...的確幾煩...又哂時間...

playbr2

Originally posted by sakura310 at  10:22 AM:. l, m: P- ?, n
- r1 k' V6 y% m0 g

8 U7 v$ R7 k# M不懂的話就問playplay,佢會知答案

* S& r$ D) ?# a0 F6 A
$ x; p( @! U, L

playbr2

Originally posted by sakura310 at  06:47 AM:
0 O7 G( {8 z1 R* a! S捉錯處就唔敢當, u2 R* C; I* a
不過,c=101n哥度(解...

2 T0 p( o6 }5 c" Q+ V8 b& [4 F% m' L, l& d, B1 g" ]- ^  G9 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
& O4 i/ R; L$ ?0 |2 E2 Y- m' j) ]) M反而適當地調節一下 , 咁會理性好多* v, N2 u/ X& I8 V" b5 g/ N
就好似隻game 由12粒珠 加到13粒珠咁
7 y  q, l3 g/ B3 w5 p; e0 E當''堂''好玩哂
  S+ w7 H& |0 D4 w( \8 j3 A' {" g, q' s" V7 f' J' k( g
p.s. 求''堂''字正寫