playbr2

Originally posted by sakura310 at  09:58 PM:
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對不起
% A6 D7 }. u- S3 `1 J請容許我指出錯誤& h: R# U/ B0 U5 L

" |# V! M9 @- F3 D7 v5 Z# ~在...

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咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:. C) P/ n5 l9 `# u+ u) m9 ?

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* `. ]- J0 q. C! |3 O7 M% Y; oplayplay你串我?:fig...

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乜咁快手ㄚㄚㄚㄚ
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) K+ M3 I- J7 _* l: w# k1 e2 V9 I個答案可以咁.....5 O$ m  \- V6 c

" f1 c' D( _2 u! p1.ab+bc-ac=0
9 r, Y% z7 h9 K, h( sa-c=101+ b/ e) d- E$ Y( w
b=ac/(a+c)=(101c+c^2)/(101+2c)0 g) N7 i# R% ~  M
設c=101n. z  \0 B% j3 g2 D  X* t, @
101n代入c
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[101^2*n+(101n)^2]/(101+202n)
, X! N# z5 a+ a- s) L=[(101^2)n(n+1)]/[(101)(2n+1)]$ |7 Y1 |0 w4 p
=[101n(n+1)]/(2n+1)
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/ G, b" ]. B! |0 W( o因為a、b、c是正整數
5 J" Q- z" v. G1 X2 }5 y* H所以n是正整數4 v& q9 e0 ^' R; b) G
所以[101n(n+1)]/(2n+1)是整數" Q  c9 P" F7 U% K# l
2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)
9 Q( K0 y# E7 d; i& g, h  xn=50
" w0 O$ _# a% e: M: o5 Ua=5151  <--a-c=101
1 O5 n  A+ |5 q# c0 u1 U* c2 zb=2550  <--[101n(n+1)]/(2n+1)
* |+ [+ f/ i. ]* b6 t  p) gc=5050  <--c=101n4 S0 j* m) _( W
答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:
# ^3 P" l2 ~7 E2 A1 ~* n, JFilename: DSC01158.JPG( B) i7 a) u0 x
Datetime | Downloaded by | Counts5 y6 P' C2 [% |" x2 d; H8 z" h& q( _
2008-01-18 00:25:24 | 阿感 | 2$ o$ x9 n8 j. l9 R' U
2008-01-18 00:24:20 | playbr2 | 2. Z9 p6 N0 F$ Z
2008-01-18 00:22:02 | 但丁 | 2
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& Z6 K' d0 b0 W4 P5 L( k+ D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+ I7 A: K( y2 c/ P0 C. F( B" k( C
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:% s# N, L2 k! z( l
Filename: DSC01158.JPG! P% Q; ~/ S" W9 k0 _% F' h- q
Datetime | Downloaded by | Counts
0 _1 u2 ~. d# e* w+ w8 p5 M2008-01-18 00:25:24 | 阿感 | 2# h6 p/ ^) ?/ M3 H* i
2008-01-18 00:24:20 | playbr2 | 2
8 R+ x% x, `* d# F& ~2008-01-18 00:22:02 | 但丁 | 2/ O3 L3 v4 m0 x+ [

! W9 N- T  b3 f8 n點解大家都down兩次? XD

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  T1 \/ I- l4 T' `- Q快d捉我錯處
- Q6 I9 Z2 I0 R: x+ D話吾定我都打錯 + - 符號* F0 \+ _  }2 C- 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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2 H, ]' A; ]- R( Q; y  N9 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:: n2 C5 {* q0 B2 U7 ?. T2 I
捉錯處就唔敢當
& [' _0 [2 y0 g( ]. l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
0 h7 c" p, [, m7 n4 c% |反而適當地調節一下 , 咁會理性好多& o% `0 ^1 W% l! I
就好似隻game 由12粒珠 加到13粒珠咁
3 C' H$ E! ]- r- {2 N& X9 v  ]9 c當''堂''好玩哂1 B5 `" A$ E$ D2 o, r- ]  {6 U8 t
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p.s. 求''堂''字正寫