playbr2

Originally posted by sakura310 at  09:58 PM:
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4 Y/ ?; ]. A; ?& R! F$ u對不起" N$ h; T& I* Y- N" w+ J0 E
請容許我指出錯誤; g( ^6 V. j4 W# x% b+ B

" Y$ r7 j1 p8 Z8 ]3 v/ |! g9 |在...

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% ^6 i  ?5 |; J! ?+ Z& J7 y2 K咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:
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0 q3 S0 U2 {! ^! c+ s  qplayplay你串我?:fig...

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乜咁快手ㄚㄚㄚㄚ) l6 `6 R; o6 _* w1 x' ~( b& c
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個答案可以咁.....
4 A; B: ~$ |% [6 q3 B9 k( v2 n% `: K9 b- w
1.ab+bc-ac=03 w+ ]; }6 T, {; r5 I( t
a-c=101
! m$ _' C. }( t# C$ _5 wb=ac/(a+c)=(101c+c^2)/(101+2c)' g5 E+ f. Y' I5 g5 u" x
設c=101n. P% P" c* G" b% l/ H9 S4 l
101n代入c- ]7 N# Y) K  `& T  `, n

4 m& X" r8 S8 |[101^2*n+(101n)^2]/(101+202n)
4 B' `% P) z% ~=[(101^2)n(n+1)]/[(101)(2n+1)]
) m& E) |( v- f4 d  t9 c=[101n(n+1)]/(2n+1). {2 [$ F/ K5 }) j/ d8 O" A7 e
# P- C  a  i5 E  V! h5 P
因為a、b、c是正整數
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6 c% |( [" ?) A8 U0 G% j所以[101n(n+1)]/(2n+1)是整數
2 B5 a6 b" j7 s) z3 D+ I2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)
# I# I, Y8 ~: Tn=50
' |% m# p1 K9 `' G/ aa=5151  <--a-c=101
- ?5 [" ?! X" ^b=2550  <--[101n(n+1)]/(2n+1)
5 }) k' ]% _, i3 K+ |c=5050  <--c=101n/ P' x5 v0 D' x! w( c
答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:
8 l5 C0 h: k2 ~- r9 d2 X' \. NFilename: DSC01158.JPG
3 Z' R' r: i% i" o8 C# d8 yDatetime | Downloaded by | Counts
. D: q! N4 @0 e1 B: r' f7 C" n! }2008-01-18 00:25:24 | 阿感 | 22 w! I5 V+ c4 ~
2008-01-18 00:24:20 | playbr2 | 2
" n! h( T; B! h5 t) g: \7 {2008-01-18 00:22:02 | 但丁 | 2) k: l& T# }! B' l
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點解大家都down兩次? XD

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6 e" P/ u7 g( S; m- x' ?% f" B8 C, J# r我第一次開睇左2秒就close 左( E: H! y/ c* N6 U( o0 c
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
* y% q0 j1 w: Q+ t1 n; u" B4 HFilename: DSC01158.JPG5 I! }" Y! P( L5 X0 _
Datetime | Downloaded by | Counts
0 o" x7 g1 r! S. R1 E/ {2008-01-18 00:25:24 | 阿感 | 2
* Q, d# l" x0 o( E6 J. k2008-01-18 00:24:20 | playbr2 | 2* q, a. x# h4 z- @( ?
2008-01-18 00:22:02 | 但丁 | 2
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點解大家都down兩次? XD

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快d捉我錯處: D. Q2 c+ [( E; M) j
話吾定我都打錯 + - 符號0 e1 m& M1 m9 M+ x' `0 `8 N
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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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:
6 k1 H, }% Q! h: |/ K% A7 J捉錯處就唔敢當8 U' X7 o' m' K2 h$ Z; H9 D
不過,c=101n哥度(解...

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1 B; l( |& 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7 y$ h. M) A4 G2 J" v: y% M
反而適當地調節一下 , 咁會理性好多3 ^. a8 _" v9 B& x7 ]+ {
就好似隻game 由12粒珠 加到13粒珠咁
) `, t& H; r6 x" m當''堂''好玩哂9 g4 x5 a: d2 L( U
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p.s. 求''堂''字正寫