playbr2

Originally posted by sakura310 at  09:58 PM:
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對不起
9 D: i8 w! s- K2 D* {1 d請容許我指出錯誤
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/ w: B' j3 l# {0 D* d1 y. ?7 |8 Y. w在...

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咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:
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playplay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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1 z0 g& ?3 O4 u1 w2 }5 z9 p1.ab+bc-ac=0' j, q) F; E$ g- S7 L
a-c=101" a  H; D2 e) ?% g6 v; b! P
b=ac/(a+c)=(101c+c^2)/(101+2c)
; k6 Y1 u4 A1 m" K$ q5 j設c=101n
3 i# ]: Z! d) q) m5 y101n代入c4 [& Q- l1 V* E! U3 @- N* A

' Y& g! C2 y) `, g3 Z2 c[101^2*n+(101n)^2]/(101+202n)
' x8 ]9 Y  f  b' d3 x& m# n- T=[(101^2)n(n+1)]/[(101)(2n+1)]
  ]" I. n. m6 g  z$ @$ U=[101n(n+1)]/(2n+1)' \4 B1 W  K$ [0 p) l

+ P* h5 z# l) \# _- G因為a、b、c是正整數5 K0 Z: B0 e, h7 V
所以n是正整數4 Y5 Z( ~5 f: ~) v6 P
所以[101n(n+1)]/(2n+1)是整數
5 U' y- f7 {/ F! m) V3 Y% h2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)
# ?- v8 P0 K1 p/ j$ X; O) an=50
& ?, ~7 ~8 ]* S+ `a=5151  <--a-c=101
/ G* W& C) O1 B2 F0 Xb=2550  <--[101n(n+1)]/(2n+1)2 {# F: o: M& @& T
c=5050  <--c=101n
& `" s! k9 k8 E' E$ P答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:
2 P+ F% m; ]0 U4 F# b( J/ O  lFilename: DSC01158.JPG4 E& q* R. H, [; T- ]: {
Datetime | Downloaded by | Counts
. U* q9 q  \& u0 {2008-01-18 00:25:24 | 阿感 | 2
  o+ t7 L" P1 r1 j: X& l2008-01-18 00:24:20 | playbr2 | 2! M3 U' N6 M& M+ ]% Z/ d
2008-01-18 00:22:02 | 但丁 | 2
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+ ~& w. L& X9 m點解大家都down兩次? XD

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/ r. S: d! h- a* w* _我第一次開睇左2秒就close 左" g5 l: J) }1 M5 u6 q+ Z' b& x
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
% f1 V, I2 w- K% P& g& LFilename: DSC01158.JPG  g9 k7 y. @4 ]
Datetime | Downloaded by | Counts  p, `! x2 z/ d8 N
2008-01-18 00:25:24 | 阿感 | 2
& q8 L& j" d, b2 T0 g2008-01-18 00:24:20 | playbr2 | 2
  q5 Y) ?7 j6 I& K* Y4 U* {2008-01-18 00:22:02 | 但丁 | 2
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0 k2 C" S- b( r6 a點解大家都down兩次? XD

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快d捉我錯處* p% q" p! t, Z& M4 s- M, d/ F4 D' w
話吾定我都打錯 + - 符號
: G: V* Z! c( ]# r6 L6 C* 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:7 f5 x: v; U% p' Q
捉錯處就唔敢當
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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2 l/ c; Y! v( l$ F) M' |0 d
反而適當地調節一下 , 咁會理性好多* u' J& c# P: P2 \# Y8 G6 h! D
就好似隻game 由12粒珠 加到13粒珠咁
2 ]$ b% K0 S2 u5 Z6 [, \! R當''堂''好玩哂3 b7 h+ ~' ^# z0 p

: h+ U, `1 G! c# U3 S) A! Qp.s. 求''堂''字正寫