playbr2

Originally posted by sakura310 at  09:58 PM:# G/ w  w- \- x9 I

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對不起
2 n) y& B9 N( H1 O& D( [請容許我指出錯誤. r! O. W6 i, z1 c7 S

2 R+ T7 g1 _5 O8 Y$ X% @9 i. T" v在...

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% M5 u7 j2 a/ y; {+ s+ u6 v咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:9 N' b4 n9 d. Z* i" B1 j3 y+ l

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. X% K% K; s# l: b) ~; \( xplayplay你串我?:fig...

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4 T& c3 i  P$ R5 h+ C乜咁快手ㄚㄚㄚㄚ) f$ W- V) e9 o, W) ^* [9 {) j* Z

* c+ ^1 N. K7 q個答案可以咁.....3 ^# k& Y) q1 G, e5 c2 c
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1.ab+bc-ac=09 y) u. h1 n; F4 j* r6 `! c' h
a-c=101
& I& E9 P* @+ {  Z& o& N8 a0 R/ h8 F7 Xb=ac/(a+c)=(101c+c^2)/(101+2c)5 o0 M5 M" M- V% M. _
設c=101n
* P5 d4 f7 e: N+ {2 Z9 _: }6 }& m101n代入c
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[101^2*n+(101n)^2]/(101+202n)
  A: ~4 v5 J4 v% W9 \* B7 H" z* _7 k=[(101^2)n(n+1)]/[(101)(2n+1)]
: d8 p- r* _* J0 v+ v9 |=[101n(n+1)]/(2n+1)/ A: i2 L$ Y- @, z6 G7 B

1 U; ~! _- H% Z+ o  E& v4 j因為a、b、c是正整數. B6 [  y$ P8 o$ F8 p
所以n是正整數
3 S# Y: A  G! o& G所以[101n(n+1)]/(2n+1)是整數
  G: z) W( [5 \  Z  V5 Y2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解); @5 @' ?, Z9 F& Z3 G: T
n=506 [. `6 L) G" A9 [9 k/ |
a=5151  <--a-c=1011 ]0 w. L" ^$ y
b=2550  <--[101n(n+1)]/(2n+1)
; I: P! f* i$ C* b" I: j+ \+ _c=5050  <--c=101n" X6 H+ u9 ~+ X& y/ y3 B+ {" ?6 ~/ n% i
答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:1 D; s( R4 ^, E4 G$ d8 q# j3 F
Filename: DSC01158.JPG
+ X/ X% W( @8 K; M( KDatetime | Downloaded by | Counts0 `: z. V0 {) b
2008-01-18 00:25:24 | 阿感 | 26 C4 k0 C! `& e$ |* M. _
2008-01-18 00:24:20 | playbr2 | 24 _5 _+ S* {& C( f9 Q5 K1 A% t' J4 ^# o
2008-01-18 00:22:02 | 但丁 | 2
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& c3 s( f: t+ F+ I  K點解大家都down兩次? XD

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我第一次開睇左2秒就close 左# w0 G" Z% E! L7 d* P1 x) I1 Q
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:: S; X) }9 E" r
Filename: DSC01158.JPG; a( T8 e8 R) g" a
Datetime | Downloaded by | Counts+ }3 j$ m: |: n  f) N5 X. I
2008-01-18 00:25:24 | 阿感 | 2) F0 W4 W$ p, Q1 p+ O! |; d- o; J
2008-01-18 00:24:20 | playbr2 | 2
  J& x9 L) ^5 M1 G3 e% V5 ~" P9 J  O2008-01-18 00:22:02 | 但丁 | 2
7 t! p* r/ _8 s" k
. |  Y$ N7 _" G點解大家都down兩次? XD

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快d捉我錯處
3 Q) [& Z9 ]$ V2 j! l話吾定我都打錯 + - 符號# G- [, v/ l, {* @' A2 h
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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' ]- ~3 j; e3 C& [3 p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:; a. u$ p5 K' r3 M  q# p/ q
捉錯處就唔敢當
# N: O% V4 w7 `5 z- N# J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
. l( k! d9 `1 u6 d& Z/ |9 I1 \反而適當地調節一下 , 咁會理性好多% B8 A: F- T# a
就好似隻game 由12粒珠 加到13粒珠咁1 g% B/ l, z' Q1 O2 ]
當''堂''好玩哂
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2 A2 I1 M: ^, \9 a2 u  h0 w4 Q# dp.s. 求''堂''字正寫