playbr2

Originally posted by sakura310 at  09:58 PM:
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對不起
* o% L+ Y! ~( H' }請容許我指出錯誤
# |3 e+ d, l) f# k3 |2 e- n% Z6 u0 p- _  m9 v. t* q
在...

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) T, d) y) {" D9 r咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:' X9 u" b; r! _( s5 s0 {( a$ R
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# o. q) `* K; zplayplay你串我?:fig...

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乜咁快手ㄚㄚㄚㄚ7 S+ f# S/ `8 ?

$ ~- _: g. w0 ~$ L( M6 w7 L% |; U; ^個答案可以咁.....
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1.ab+bc-ac=07 Q4 N  W/ N) G. Z
a-c=101
) g9 T: B5 f* o2 g" R' Ab=ac/(a+c)=(101c+c^2)/(101+2c)
9 ?# I0 E: j& ]4 |, z設c=101n
% F% C. n( g) ]101n代入c
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& U0 X* J! C: h2 E, ?3 v[101^2*n+(101n)^2]/(101+202n)
( S4 N( p4 Z* o/ {/ ]=[(101^2)n(n+1)]/[(101)(2n+1)]
4 w2 Y6 z. Y  t( n=[101n(n+1)]/(2n+1)
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因為a、b、c是正整數
: ^0 e7 H0 @* D. a% |  x/ A所以n是正整數: S2 r! C9 K& h3 r* Y! [9 n0 d6 {
所以[101n(n+1)]/(2n+1)是整數1 S0 g0 ?3 {3 x  @1 ], q; S3 `# E
2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)
( o& `* _& ?! n1 p9 _$ s* q9 Kn=50+ c+ |! c' T8 N; C- ]) J: q
a=5151  <--a-c=101
. ~/ U# P: Q7 B. L" {b=2550  <--[101n(n+1)]/(2n+1)( c. C5 ?+ T; a# p5 c, Z
c=5050  <--c=101n  _1 `5 i; u0 T7 @0 @
答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:
# }+ K) z* [6 c/ L& A% l; x! bFilename: DSC01158.JPG
/ Y3 U1 ^1 B0 D" S& n, sDatetime | Downloaded by | Counts* e8 S3 I- i) ^! N  w* ]8 t* B# l
2008-01-18 00:25:24 | 阿感 | 2
( Y5 A# l, G  n; m& ?/ S, |/ ~% a2 c2008-01-18 00:24:20 | playbr2 | 2
* L8 W- f8 n, F' d' }$ m: ?" p2008-01-18 00:22:02 | 但丁 | 2
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& r% T+ k& ~: L* Y4 Z% n: M* C點解大家都down兩次? XD

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. h+ I( \: J( u4 e8 \我第一次開睇左2秒就close 左
9 X4 F7 w4 P0 D4 H# y9 @之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
! Z* V" W! |! z9 }# D+ L3 B) d; ZFilename: DSC01158.JPG
- u" n6 f9 T; y6 RDatetime | Downloaded by | Counts8 `& N8 F3 [1 o) f9 a
2008-01-18 00:25:24 | 阿感 | 2
! {9 p3 o0 I, `, ^' {. X$ \6 s2008-01-18 00:24:20 | playbr2 | 2
# t* b& o+ M: N6 `! w" D2008-01-18 00:22:02 | 但丁 | 2- B$ s+ D2 _9 \) O, n
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點解大家都down兩次? XD

4 }% j* {5 M, D; C' Q, s7 a7 I2 f
  w# @& {# B+ Y. i1 |- z快d捉我錯處8 O% z5 e: A3 v+ c% ?4 @
話吾定我都打錯 + - 符號
& x7 ~% S; G1 ?# q" [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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5 c' p3 ?2 q3 e3 i4 Q- z( u  `1 O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:0 W3 Y# C  ?7 N; a; @9 k
捉錯處就唔敢當/ F3 K& J2 s7 U, w- q2 n/ W
不過,c=101n哥度(解...

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7 D1 [) [- q3 d) ?& g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
3 b" ^, q# X' M/ l* p. x反而適當地調節一下 , 咁會理性好多6 P7 q7 f2 F* G: j
就好似隻game 由12粒珠 加到13粒珠咁
$ M; j: ]8 z6 r' v6 U; U% s當''堂''好玩哂+ l4 Z9 g9 t# I5 |% ]

. h( b" W/ B, Hp.s. 求''堂''字正寫