playbr2

Originally posted by sakura310 at  09:58 PM:0 j, z& s1 a2 o- `: x! k
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3 a4 T  G# _  {. m0 l3 A9 r對不起$ q/ V" i! ?/ [
請容許我指出錯誤/ f4 i+ P+ K4 K6 M

( s0 M& K" {& V* z$ Y在...

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咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:; N. B/ N& d4 Y7 M9 \6 B6 i- [" X

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playplay你串我?:fig...

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乜咁快手ㄚㄚㄚㄚ
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- ?. i4 Z  x; j個答案可以咁.....$ h" k% q) Q: ?& n+ s7 z
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1.ab+bc-ac=0
! A- j/ ^' R4 Q- |a-c=1015 |1 I; E  C1 @% _  W  x
b=ac/(a+c)=(101c+c^2)/(101+2c); ?; g: [" {1 r
設c=101n9 E+ t# r0 m1 S+ e
101n代入c" e5 t- z0 }' u

. T% O! g4 }# p3 r& [[101^2*n+(101n)^2]/(101+202n)! a, [/ t4 d9 A0 l. U$ z( k6 x9 ^
=[(101^2)n(n+1)]/[(101)(2n+1)]) Z4 c9 `9 J. p# l+ v
=[101n(n+1)]/(2n+1). {; k3 Y4 g' ^; S

! O- V0 {7 r$ A' C; i# r! U* B: K0 A因為a、b、c是正整數( a: C- w& C, S8 A% R2 v; Q( |0 U# E
所以n是正整數4 Z0 O6 I9 L. d- {
所以[101n(n+1)]/(2n+1)是整數
9 W; X& F3 [5 H  N2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)
$ R$ ?. _* p% z1 Z1 a8 gn=503 p9 Z- _6 ~' {5 d$ R" e
a=5151  <--a-c=101
; I4 g$ k4 N# Q" I; [( @8 d8 h/ vb=2550  <--[101n(n+1)]/(2n+1)
# ?/ j$ S* Y6 t: ^9 e- d- E, c3 zc=5050  <--c=101n
8 m- I" J2 J; z答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:
1 f( ?7 C7 T& Y5 @" M: p+ ]& JFilename: DSC01158.JPG3 E" V2 D1 C/ \
Datetime | Downloaded by | Counts
" `% E, A7 m# \9 ^! h" s. f; \2008-01-18 00:25:24 | 阿感 | 2" C2 i$ ~' V7 a# d
2008-01-18 00:24:20 | playbr2 | 2
. `- a- b. {1 U: P0 r4 K" G2008-01-18 00:22:02 | 但丁 | 2
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點解大家都down兩次? XD

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我第一次開睇左2秒就close 左
% g8 l% t% z; z3 _7 S* y之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:+ [/ q& s/ o: N) a) e( H! Z
Filename: DSC01158.JPG5 H. z0 b4 A* M. s) }; B& d2 l
Datetime | Downloaded by | Counts
1 P- @+ R! I- m2008-01-18 00:25:24 | 阿感 | 2
& Q, |9 A6 {  @2 ?% K7 ^7 T2 @  \2008-01-18 00:24:20 | playbr2 | 2
/ O- E# z, v- E2008-01-18 00:22:02 | 但丁 | 2- Y6 \; S- {$ l

! }3 R4 O0 E- q8 o點解大家都down兩次? XD

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3 R7 M, U% _* ]+ E: h; q快d捉我錯處
. f/ W8 w; C; u$ r話吾定我都打錯 + - 符號( E# {9 o, _! q  u0 W; Q8 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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$ ?9 H: n7 u3 l+ z0 q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:
: Y+ K& M& T$ k# t- d捉錯處就唔敢當
8 o8 _" O8 @: E  |. `8 h- k! H不過,c=101n哥度(解...

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1 P9 b  Y1 w  z7 X/ t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7 J! C: d$ o( M+ E) ^! y- r' m
反而適當地調節一下 , 咁會理性好多
1 _$ l# [& r$ I( o就好似隻game 由12粒珠 加到13粒珠咁9 Z! N" |3 D% @1 ?: z. C: p  w
當''堂''好玩哂) B* L, H2 \9 N. T- ?

3 U$ T" I2 s* G; Q$ O3 Jp.s. 求''堂''字正寫