playbr2

Originally posted by sakura310 at  09:58 PM:* [" T& ^) ^  ^1 E( P8 E6 ^

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3 q* H' q3 d$ i- w+ r" q% r對不起
5 l, f8 z3 W" X" Y: G  e4 u$ M8 A' K請容許我指出錯誤+ h# d/ r! i1 G( `0 y
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在...

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咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:
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3 u4 Y$ _! S. q  n9 Gplayplay你串我?:fig...

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乜咁快手ㄚㄚㄚㄚ$ |& V: g; a6 y4 O- Q, A

' v7 m3 K# \% K4 a個答案可以咁.....% ]. p. o  ~" t- Q# E( V

9 U7 o# v0 X6 T9 Y1.ab+bc-ac=0
/ k0 a" }  X2 v2 v5 Ba-c=101
1 s- H4 x; x% c/ i& H4 ~& nb=ac/(a+c)=(101c+c^2)/(101+2c), l% k3 k% h0 t# F6 W# y
設c=101n
) a* m' B# P1 l0 v# x# M9 ~! K101n代入c
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[101^2*n+(101n)^2]/(101+202n)& t% ~( G3 I0 S' {! Q
=[(101^2)n(n+1)]/[(101)(2n+1)]
+ R. t3 x# f* m1 f=[101n(n+1)]/(2n+1)
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因為a、b、c是正整數
  t- M( T# h$ b2 I所以n是正整數. i1 K  Q3 O- K* U& J
所以[101n(n+1)]/(2n+1)是整數
. _$ P1 ~+ W( [# @& G8 K+ l2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)
9 R% P" u2 V, c. Pn=50
4 O% ~# a; D; F. o! F& q8 D) ca=5151  <--a-c=101/ R- w& c* H  k, }- q
b=2550  <--[101n(n+1)]/(2n+1)
& P, r' ]8 ^" a! g8 X; A# p" mc=5050  <--c=101n
# {) l- M) W! x  i' M/ B答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:5 }( g# o5 j4 j" j+ u3 \
Filename: DSC01158.JPG2 ]; _1 T' h! e6 S) q
Datetime | Downloaded by | Counts
0 ]1 G8 b+ H3 y+ }- Z+ i. U2008-01-18 00:25:24 | 阿感 | 2; L* ^& j$ L: @1 D" \. V
2008-01-18 00:24:20 | playbr2 | 2
( q1 J8 z* O' I2008-01-18 00:22:02 | 但丁 | 29 E6 p6 L' A" J3 E( a- G2 ]
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點解大家都down兩次? XD

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9 b& ?  P* t' T" o( a6 n3 c我第一次開睇左2秒就close 左6 \* `" R% g  W! a
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:' h- {* D2 ]' Z$ q" [: j
Filename: DSC01158.JPG
! p. j% W+ Q* w( [Datetime | Downloaded by | Counts
( y0 y2 l5 H$ ~( e  n2008-01-18 00:25:24 | 阿感 | 27 Y! Q4 ?  r. B9 q) J1 T
2008-01-18 00:24:20 | playbr2 | 28 a% {- x3 f  ]/ o' g& {0 ~
2008-01-18 00:22:02 | 但丁 | 28 u/ m3 L( ^6 s3 F8 C- Q
5 }, ]. c6 b# R: x
點解大家都down兩次? XD

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6 J0 h% B0 ^2 r3 x快d捉我錯處
8 O) Z  [' z& a1 R話吾定我都打錯 + - 符號
7 W/ u0 T% \$ }# [$ Z# `係電腦打答案...的確幾煩...又哂時間...

playbr2

Originally posted by sakura310 at  10:22 AM:) P% ^5 o# {' Y1 v

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0 l6 e' m) O0 n1 d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:0 M: F) p% G! ]0 t& D0 u) |$ M
捉錯處就唔敢當' V1 D. S& @- p! f; x9 Y
不過,c=101n哥度(解...

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! F% u$ k2 `$ k5 {8 Q3 ~. e+ V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4 C8 y7 W9 f) }
反而適當地調節一下 , 咁會理性好多
% T1 j; A; O' p- ^) L" n; ^! g, i就好似隻game 由12粒珠 加到13粒珠咁* E, H  I; ?/ J) X9 b  b% {8 ?8 R* P
當''堂''好玩哂
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p.s. 求''堂''字正寫