playbr2

Originally posted by sakura310 at  09:58 PM:' ]. y% d: k0 i- i+ l& [% d5 _: G

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對不起
% z) O7 R9 j0 o1 D& d請容許我指出錯誤
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$ |% [& B# `! _% a& ?在...

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8 A" L% t! v, W, m& [& p咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:& W1 ]5 V2 A* {# v7 `; z
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% T5 l: [" _& ^: Y; Y9 wplayplay你串我?:fig...

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# `$ V6 e; g7 l: ~) f. Q& N9 t乜咁快手ㄚㄚㄚㄚ
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; E! S3 X% b4 d4 K* u7 V個答案可以咁....." R5 d, F' z: a$ M8 |6 Z% ^4 j
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1.ab+bc-ac=0: {9 }) V5 U% A9 L  b) b; W
a-c=101! O: v5 l2 q7 N, I9 ?
b=ac/(a+c)=(101c+c^2)/(101+2c)
0 D# H7 T' v. f4 \6 m設c=101n
. `9 t, B; x( O( c" P4 S' ~101n代入c
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/ ]" @0 Y6 F( C, y0 W[101^2*n+(101n)^2]/(101+202n)
+ F+ f' i: `$ |# r  e=[(101^2)n(n+1)]/[(101)(2n+1)]0 G3 v8 r3 _% S* o. T! q* e! ^5 W
=[101n(n+1)]/(2n+1)2 }" y1 }3 ^* P6 G
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因為a、b、c是正整數
3 K! o' _  a( F2 b. I1 ^! a( _所以n是正整數# S4 M, @/ a& F+ D3 ?
所以[101n(n+1)]/(2n+1)是整數# Y/ n+ f3 R! Y0 W% h
2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)
9 B; Z! T, t2 u4 O' U' ^, T8 E& D9 P. tn=50/ T/ n6 v$ Y/ p
a=5151  <--a-c=1019 k8 u' s; O" [* f
b=2550  <--[101n(n+1)]/(2n+1)
8 Q% |* q6 q) f" }) \0 F; |/ tc=5050  <--c=101n  y3 V, {! }" ^* N" a; f$ ^
答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:
% ]% C5 m5 z7 I) c, T/ F. A8 yFilename: DSC01158.JPG+ O% u1 u2 B% f( q
Datetime | Downloaded by | Counts7 T7 z' [8 R# y- p; }' f  y
2008-01-18 00:25:24 | 阿感 | 2
( S/ q* D6 @5 U* Q+ ^; U2008-01-18 00:24:20 | playbr2 | 2
5 x7 i2 {1 y* K+ O2008-01-18 00:22:02 | 但丁 | 28 ?0 F* @1 Q: G4 ~7 B) P

: G8 a, d4 g; }* N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, r: G( K3 b% D0 S" {
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:4 m6 o9 }' b  e! F
Filename: DSC01158.JPG
: x/ m/ I. @: r: W& x; l' SDatetime | Downloaded by | Counts
3 ], X7 ]9 }! o0 a9 K4 ^2008-01-18 00:25:24 | 阿感 | 2
, E" Y- l0 r* a9 d1 c2008-01-18 00:24:20 | playbr2 | 2
! h6 S* ^3 \$ r) @5 j: K2008-01-18 00:22:02 | 但丁 | 2
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/ d, f8 i2 T' I. Y% ?6 Q點解大家都down兩次? XD

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- J; r; C2 |4 e1 r" s% j) j$ g; h4 ~快d捉我錯處
' L! L. Q2 I% T4 |2 }話吾定我都打錯 + - 符號
" ]& u% }: l; W6 m7 T係電腦打答案...的確幾煩...又哂時間...

playbr2

Originally posted by sakura310 at  10:22 AM:0 t% {: _1 d' Z! V

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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:
' m9 ?5 |( D+ p2 M' @' o7 a捉錯處就唔敢當" v8 h% O5 C  t- ^$ I" c
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
* g$ o" O: y6 V3 m反而適當地調節一下 , 咁會理性好多
9 l% l1 y. ]/ q: A3 e7 x2 o7 N) o& I就好似隻game 由12粒珠 加到13粒珠咁$ M/ i% e  A1 x4 K% H
當''堂''好玩哂
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9 d$ p# e( e: M" _p.s. 求''堂''字正寫