playbr2

Originally posted by sakura310 at  09:58 PM:
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: W! P$ K) J4 z* ~2 s+ v6 L對不起
; G* m) b" d0 S請容許我指出錯誤" u4 W2 Y* r+ V4 u
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在...

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咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:7 M+ I0 z% y$ ]9 p, G, @5 }
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( |6 v! x( x1 s; x' d: \playplay你串我?:fig...

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: K6 p: K& j5 e% Z! g乜咁快手ㄚㄚㄚㄚ
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; R( t# D. p9 v個答案可以咁....." S/ t! g- s" G6 t! T+ b% c1 @
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1.ab+bc-ac=0
2 l, p% U9 S" e) u. V, E) `: }+ m0 Sa-c=101
0 V9 P5 d. @! l, n6 ib=ac/(a+c)=(101c+c^2)/(101+2c)
5 U/ n1 q7 P6 v4 x( ^" }" q. h設c=101n8 \. w6 V7 T7 n: A  Z9 V
101n代入c' }& C# x% Y) {

. `8 x. ^2 s5 [! K( q[101^2*n+(101n)^2]/(101+202n)! o# w$ D+ `! w6 L9 x4 a! S5 x* C
=[(101^2)n(n+1)]/[(101)(2n+1)]
3 U5 @8 Y$ @% Z4 |9 E=[101n(n+1)]/(2n+1)( ]" D; F" Q+ G8 s4 S/ w) k
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因為a、b、c是正整數
9 C- A8 W5 ?; E: y5 S( {* S% i6 c所以n是正整數* @. @; e- H/ T. q
所以[101n(n+1)]/(2n+1)是整數! F/ `6 ]& Q( |1 G% b3 y- O
2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)5 r% Y4 F8 u6 P: ~5 F) O( P
n=50
5 H9 W# l1 L; ?+ p  t! i2 Ca=5151  <--a-c=1015 f* l9 W3 n5 E0 h# {8 e
b=2550  <--[101n(n+1)]/(2n+1)
; r, {, x2 o+ B, wc=5050  <--c=101n
3 U) D- H/ e9 m$ y" F- Y6 z& D+ ]答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:0 x2 v7 m" m3 I- W1 |
Filename: DSC01158.JPG
$ v2 E6 X5 r$ ?& Q1 P: p$ I' J/ hDatetime | Downloaded by | Counts
. _$ X- k  s* O8 {5 o' z5 `2008-01-18 00:25:24 | 阿感 | 21 K  g! i5 E, C* x
2008-01-18 00:24:20 | playbr2 | 2; M, V3 q* m* G: s  U% u
2008-01-18 00:22:02 | 但丁 | 2' x& Z* {6 T; v- H% Q
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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
& K# U* e9 e  h之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:. N6 e5 A& k- E: f( b- d
Filename: DSC01158.JPG
# v/ c" L/ ^5 b, G4 `Datetime | Downloaded by | Counts
7 u* v" h4 q% X2008-01-18 00:25:24 | 阿感 | 2/ |3 T# B8 P; P: t: h
2008-01-18 00:24:20 | playbr2 | 2
9 A' e% D+ b# m9 W# @2008-01-18 00:22:02 | 但丁 | 2% c- m/ ^2 M7 ]. N- c

7 C  u1 H; y# d+ M0 U% {, M點解大家都down兩次? XD

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; R" n8 t: c& s2 _( ~6 s快d捉我錯處
0 W( D( D. P1 E  e: @話吾定我都打錯 + - 符號' _+ h$ c( c1 k1 w+ }2 T
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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" f. R7 B$ F; t, M8 W, N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:
5 b) b: W# e' d. e- V捉錯處就唔敢當/ ]( w8 e3 V! |# F" h
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
2 K% [6 Y% U$ k$ `1 a0 q! w5 b反而適當地調節一下 , 咁會理性好多
9 B$ V9 [* z$ P/ X( W; J- F; _就好似隻game 由12粒珠 加到13粒珠咁
/ U; F- s' z& F- B3 X% |當''堂''好玩哂) D  ]9 M" i+ _1 [6 C  f

+ p, N$ I3 d; @8 N4 w5 C* Y! e! v3 Op.s. 求''堂''字正寫