playbr2

Originally posted by sakura310 at  09:58 PM:  m+ ?, Q' R* ~2 C

# y( K7 I4 l) \/ ~9 T* t, `; K7 p* I2 B5 h
對不起+ f6 D1 E3 A/ {6 T
請容許我指出錯誤
* y9 |5 _$ i$ o6 C- [( a; `) m
7 z3 o, k/ g9 U4 E+ O在...

# @/ K0 k* E3 Z" S
5 E4 w  S5 U, R6 C* h
咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:, G5 `+ I$ E; o0 v/ G! m2 Z
" S% p( Z; I5 J; _. Y( U2 X
9 i+ b& R1 R+ f9 t2 |; g
playplay你串我?:fig...

+ e$ Y& L( r& U8 H; q( N. \

" w# q2 V1 I$ J: ?; y$ N* K! x乜咁快手ㄚㄚㄚㄚ! Z4 Y* g" a2 ~5 N

2 J# e5 D) e7 [, `; @個答案可以咁.....
) Q! P+ g5 B5 x' {! Q7 r8 f6 }  j  y8 h' ]5 H8 C
1.ab+bc-ac=0& _% U3 ^1 n5 v0 [
a-c=101
% D, x5 j4 E; D" R8 i/ H6 bb=ac/(a+c)=(101c+c^2)/(101+2c)
3 y  @8 }0 }& m: m# I設c=101n, k3 S7 ]# ^4 h
101n代入c. R8 f2 [  Y9 H) |  a
! V0 h" K) j# }: C, |
[101^2*n+(101n)^2]/(101+202n)
. ^$ _+ x+ [0 M- c% s/ f=[(101^2)n(n+1)]/[(101)(2n+1)]
! S* |; S0 K6 v% x9 j& b* Y=[101n(n+1)]/(2n+1)
; h  ]2 }/ Y. B7 Z6 k0 Z# U7 j- B* a: w/ l7 v2 }5 P' X* G% {
因為a、b、c是正整數: m4 |( l( m$ o% V
所以n是正整數8 g: V, m5 J5 W6 O5 P/ i$ i
所以[101n(n+1)]/(2n+1)是整數! K' O$ }  X) c! N( K
2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)3 Z, d) r; y0 F  L% T: [5 P
n=50/ Q$ M& d/ y) c
a=5151  <--a-c=101
5 Q* k- t! Y) B; v. d* w% Bb=2550  <--[101n(n+1)]/(2n+1)7 @* G' r0 Y7 G2 {( I
c=5050  <--c=101n
5 D5 h$ M( o" m5 `答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:$ p' }* X1 w% \
Filename: DSC01158.JPG
; s' f# i- G0 @9 b  yDatetime | Downloaded by | Counts/ s" D; [' J3 {# o0 K! ~4 z
2008-01-18 00:25:24 | 阿感 | 26 p( U& g1 u' u2 _7 K  L
2008-01-18 00:24:20 | playbr2 | 2
0 F. o; n; B( q! y. m7 F2008-01-18 00:22:02 | 但丁 | 2* o/ U' V) X" @3 ?7 V

; Z% c( d' ~0 S點解大家都down兩次? XD

8 N+ p3 Y2 r9 U! M3 o$ [2 {  O

) |4 e5 T$ y5 i# q- i2 e# V我第一次開睇左2秒就close 左5 b* z/ M% g. ?( M, d% G' p
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:* i' i- c4 V+ {
Filename: DSC01158.JPG
) G2 E- ?) G1 F/ k! |+ Q( wDatetime | Downloaded by | Counts
; t7 ]+ R: Y7 h3 F8 k. ]2008-01-18 00:25:24 | 阿感 | 20 f% ^* Z1 S" v
2008-01-18 00:24:20 | playbr2 | 27 \7 V. L7 N: a5 O" z" ]& n
2008-01-18 00:22:02 | 但丁 | 2: Y% @" p& z: u
( }- X1 `% ^) t$ }( R( y3 E
點解大家都down兩次? XD

" Q+ J( s: Y& h" O7 ~! f. U& f# k5 B& X. U7 x
快d捉我錯處
, i3 H4 X4 `7 x2 |2 L話吾定我都打錯 + - 符號% V( h: e& N0 ^  \. i
係電腦打答案...的確幾煩...又哂時間...

playbr2

Originally posted by sakura310 at  10:22 AM:
/ g( {: A2 _2 [5 h' j0 [$ p* `- U+ R4 G! K( k, A% U
; A+ S# Q5 e6 |4 V6 a! n% z
不懂的話就問playplay,佢會知答案

" s* h. q2 O7 M$ Q2 w" u5 ?; o! k
! M& B* w6 Q3 A

playbr2

Originally posted by sakura310 at  06:47 AM:# b8 [/ M5 G' J( _7 \. O
捉錯處就唔敢當
6 ~" n. [) G- p: {, w; i$ P" H不過,c=101n哥度(解...

; Y& p. \3 }/ B3 G1 _4 T  H8 Y. _: Q
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/ U, w3 E- L% c# Z2 N9 C' g* o
反而適當地調節一下 , 咁會理性好多
' \/ Q$ T9 e4 d. X& h6 p就好似隻game 由12粒珠 加到13粒珠咁
& b  }  ]; [7 k當''堂''好玩哂
: B8 H- N- x# ^- C9 D
& B" L: y1 U1 R! f. L( e5 [4 Fp.s. 求''堂''字正寫