playbr2

Originally posted by sakura310 at  09:58 PM:4 B3 r6 r) @" ~. m( O4 u
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2 z2 l: W6 b- j2 W5 M: {, `對不起
/ q% f% z3 e6 n5 u- z0 c請容許我指出錯誤
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$ ]* I5 u1 U$ k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.....$ {0 d' Y6 }# y4 M3 v0 U, w

( @9 W0 D  C# M: T6 g1.ab+bc-ac=0# O1 p1 b6 `5 F% L5 r
a-c=101& x/ a+ y# K, v
b=ac/(a+c)=(101c+c^2)/(101+2c)
1 u  w  ^/ b8 b設c=101n
1 X. o  W, ~. D1 J; U101n代入c
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[101^2*n+(101n)^2]/(101+202n)0 e- a0 q' C& M( H7 W! A% r1 f
=[(101^2)n(n+1)]/[(101)(2n+1)]+ _1 p  K2 P* T# X* h( x; U6 y
=[101n(n+1)]/(2n+1)$ B% ?' m( a$ m
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因為a、b、c是正整數; e3 n) n# r$ K! G
所以n是正整數
* \" ~; ^' U$ ~  m, F所以[101n(n+1)]/(2n+1)是整數
! b) [4 m% C( |$ `2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)
3 e3 \+ _$ V  K. |n=50
) j  h2 e* @' H5 l% W  Da=5151  <--a-c=101
* g5 N5 S1 k! a) v4 D: `b=2550  <--[101n(n+1)]/(2n+1)
, O  ~1 ^+ n0 o" \2 Zc=5050  <--c=101n0 @8 p* h. U/ {5 ^
答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:
1 D5 h+ j' {1 r0 `5 [- E- d. V( _Filename: DSC01158.JPG
  c+ ]; d1 ?' zDatetime | Downloaded by | Counts+ G9 A2 [8 }5 ?# U
2008-01-18 00:25:24 | 阿感 | 24 F  D0 j. e" d( T3 l/ ^8 l. x# e
2008-01-18 00:24:20 | playbr2 | 2! O  g, y, r4 Z% Q
2008-01-18 00:22:02 | 但丁 | 2
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點解大家都down兩次? XD

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: M0 ?  L3 P( }' [我第一次開睇左2秒就close 左
; D2 U0 g. p" X0 D& |之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:! x' W0 u, X- b# A. I
Filename: DSC01158.JPG
+ ?  ^  D& r& Y2 e. Q1 X4 |- c. cDatetime | Downloaded by | Counts
' z" b: q! D4 q7 C8 L+ |/ w2008-01-18 00:25:24 | 阿感 | 25 J) Z' w" P5 K8 Q! {; F* B3 V* a
2008-01-18 00:24:20 | playbr2 | 29 K$ E. R) U5 o. a/ Q
2008-01-18 00:22:02 | 但丁 | 26 H6 i/ z% O5 f" z) w

7 R- q- `6 @7 h& H* d2 {# J點解大家都down兩次? XD

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快d捉我錯處! K' K7 V; w, Z6 c
話吾定我都打錯 + - 符號
; _( q. ^4 U1 F* c/ u# F6 P3 `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:
# ?5 E+ O% R; n1 m9 T捉錯處就唔敢當
" H% {8 a  I7 I: k- _: Q不過,c=101n哥度(解...

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8 k7 h  U; {9 I5 B' a- F2 J2 y: H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) S$ d! u3 f  B* Q8 a/ C2 F9 U- C
反而適當地調節一下 , 咁會理性好多
/ e# U' M7 a6 J  D0 l+ [3 W就好似隻game 由12粒珠 加到13粒珠咁
$ k6 d7 w1 q; `* [0 I1 I當''堂''好玩哂6 d7 I0 }; @  T% Y5 y( D

3 ^8 ?2 e! G3 `& b0 n* k" c! cp.s. 求''堂''字正寫