playbr2

Originally posted by sakura310 at  09:58 PM:
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對不起  I7 m1 q. C! o
請容許我指出錯誤$ H1 L9 B# p( ]0 J

, K# ?- w/ M/ _  V8 \8 B. f在...

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咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:
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0 a6 n& B! A% N; V% R- e$ h
playplay你串我?:fig...

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乜咁快手ㄚㄚㄚㄚ8 e4 \2 N! ]" g* j

1 V# H" B" k5 Y$ f$ I個答案可以咁.....% @$ J4 J: P4 X1 _
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1.ab+bc-ac=0
% x+ K7 ^: e9 J; x0 m+ ]$ v9 K2 a$ l* Ga-c=101
. G" n( I) c2 _7 _( z7 g$ i3 ib=ac/(a+c)=(101c+c^2)/(101+2c); T  s8 p% d* F, m2 e6 \1 }
設c=101n
6 w5 l5 |6 ]; l. O9 J101n代入c; |8 W% O" q2 i+ b
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[101^2*n+(101n)^2]/(101+202n)& F4 ~) ]9 H- k7 L
=[(101^2)n(n+1)]/[(101)(2n+1)]
/ [4 B4 j; O9 F! o; P, H1 D=[101n(n+1)]/(2n+1)
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因為a、b、c是正整數
/ U/ [( L& q3 [7 E所以n是正整數
0 ]9 e. n% F+ d' b) s6 P# \8 g所以[101n(n+1)]/(2n+1)是整數
' n( k8 P5 i/ m' b8 G+ ?2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)' H! J1 i' l3 m; u9 B
n=50( I' Z# Z& B- z2 m" S$ X5 a
a=5151  <--a-c=101
! G/ w/ d0 D, c* _: B2 c& l2 Tb=2550  <--[101n(n+1)]/(2n+1)
" O7 S7 D  ]% z# Y4 Z4 nc=5050  <--c=101n
0 }' F7 s3 R4 k5 p答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:: A0 @' i# H% _) E
Filename: DSC01158.JPG5 O! ?" ~+ }7 l+ K. t
Datetime | Downloaded by | Counts& E/ A2 n6 t# i. N( I8 A1 R9 U1 \- _. E
2008-01-18 00:25:24 | 阿感 | 2
. ~- {& `4 {- J9 o* V5 J2008-01-18 00:24:20 | playbr2 | 2- U  d6 x& s/ W- Z+ y
2008-01-18 00:22:02 | 但丁 | 2" ?4 ?: y3 X! |5 Y3 [
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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
$ A0 c" U% W; S* r5 M# @: z0 z之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:% K$ V- w- f" a3 ?% `1 j: |  M+ {3 F( m8 T
Filename: DSC01158.JPG0 x" K# {( I$ v( [0 I
Datetime | Downloaded by | Counts
) ^4 V4 {& [+ w! y2008-01-18 00:25:24 | 阿感 | 2
. j+ F. M) I3 Z$ f5 C$ h+ l2008-01-18 00:24:20 | playbr2 | 2
1 t' i# @1 ?( i# n+ z5 ]2008-01-18 00:22:02 | 但丁 | 2
! b5 a% f! O9 n. s) t% J! g" `, X: G4 y" }7 u' L. h. `
點解大家都down兩次? XD

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1 d( Q6 m- n, }: Z* Q快d捉我錯處6 `+ j- u4 N# Q" l$ R0 A. X
話吾定我都打錯 + - 符號
  I2 O! s  X; L# W( P% u7 |% s% z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:
% f4 M8 k% p2 i, F8 H& M- a  U捉錯處就唔敢當
. Y, K# F6 \2 H2 S2 L9 w+ [% S# F不過,c=101n哥度(解...

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7 C2 M2 `0 b1 }& R/ t9 L! l4 D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
) r& }$ @: w7 b/ h) H" z0 @反而適當地調節一下 , 咁會理性好多
0 y" ^) R& ~7 Z+ k7 {( s) q4 }# H就好似隻game 由12粒珠 加到13粒珠咁, O& p( Y! j6 }& O& S
當''堂''好玩哂- |2 z$ {6 R4 y, j

7 P$ @( r0 M% E3 Z- Rp.s. 求''堂''字正寫