playbr2

Originally posted by sakura310 at  09:58 PM:7 b: j  ]: f/ L8 l( ]6 O8 V
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對不起, T- H5 y  S) @5 a) v# Q
請容許我指出錯誤( e- s2 w: C: N: g' K( [
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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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& c7 ^  ^4 h* f# bplayplay你串我?:fig...

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乜咁快手ㄚㄚㄚㄚ
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個答案可以咁.....
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% Y1 V1 U. p+ H6 r: `1.ab+bc-ac=0
1 _' b" C* E2 y1 y( }7 {6 ga-c=101& G1 n' y, i5 j# t3 a1 t* J
b=ac/(a+c)=(101c+c^2)/(101+2c)
9 n, V& Z, L. a6 c/ t  m設c=101n1 k- N* R: @0 N$ A" x
101n代入c
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4 m) I/ \+ T7 @/ @3 H# G1 g  `[101^2*n+(101n)^2]/(101+202n)
, Y9 A. h( S5 C% O=[(101^2)n(n+1)]/[(101)(2n+1)]
3 k5 `/ f8 U0 t, h$ e) H6 a& }3 }=[101n(n+1)]/(2n+1)
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* f7 X% s, L" g$ p- H& \8 W因為a、b、c是正整數
/ b$ m/ C, A* i4 p" E) j! V/ Z7 |$ P6 T所以n是正整數
5 m6 o9 t" B+ @8 n" d所以[101n(n+1)]/(2n+1)是整數
4 u5 a7 d6 U! p2 F, j2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解): a' F( D* x0 u/ p/ G( w
n=50, S- p9 k5 D; w( h+ Z
a=5151  <--a-c=101
6 u0 A) W9 I) C5 |4 Lb=2550  <--[101n(n+1)]/(2n+1)
4 Y- @0 Y1 I+ c( S( Zc=5050  <--c=101n* ]7 v$ E0 @! q& ]  f7 y) O
答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:5 s" U# L/ n/ F# p& N0 M' w
Filename: DSC01158.JPG/ |. e$ j4 y# Z& o. V8 p$ _% {* Y5 q" S8 s
Datetime | Downloaded by | Counts) q8 T% y" Q1 S+ U7 T9 c; o
2008-01-18 00:25:24 | 阿感 | 2( j- v" {- f" s& q- |5 S9 o: w, V
2008-01-18 00:24:20 | playbr2 | 2- X' ~; n+ O' U
2008-01-18 00:22:02 | 但丁 | 2
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: o8 Y* {- R; }: }0 h$ p# j  \點解大家都down兩次? XD

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- K1 ^! Z5 B3 m9 A& V6 t' T我第一次開睇左2秒就close 左  {0 v$ t9 C; W- \6 x6 z
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
3 Q5 C1 D/ U. x. u& vFilename: DSC01158.JPG$ p3 H% b: l; C4 A
Datetime | Downloaded by | Counts
' P1 }2 b& r# ]! Z2 d+ W. r  G2008-01-18 00:25:24 | 阿感 | 2
: h% ?$ G! l& U1 L, K' S2008-01-18 00:24:20 | playbr2 | 2
" z4 \, f4 m# @* O( e  u* A. W) v% o2008-01-18 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
' u# ~9 J$ p. ]; G0 D5 b話吾定我都打錯 + - 符號
8 d  Q" D! m! @- K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:
" k# _7 B- s. n- E- u/ A+ \" C! q捉錯處就唔敢當
% q/ o, F( K3 r! 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: }$ H! J, X# _3 H4 s2 L' z0 L
反而適當地調節一下 , 咁會理性好多
" X% l+ a% s7 d0 U( |2 N就好似隻game 由12粒珠 加到13粒珠咁' S# ~; S" @: K, Q' f
當''堂''好玩哂
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( @6 q% c' p+ D% _% |$ gp.s. 求''堂''字正寫