playbr2

Originally posted by sakura310 at  09:58 PM:. Z7 }* U/ z( q6 k6 z

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對不起
! j9 @5 W$ |' z9 P請容許我指出錯誤7 T& P" r0 K. s

# ]6 Q( \3 N& _: I2 Z在...

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" F& K4 e2 Y) e! m- k0 s咁你又吾去計

playbr2

Originally posted by sakura310 at  12:08 AM:- H. Q( a& W" N. i) S, P

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; _; k& s) V: H) W: \( C- p8 Gplayplay你串我?:fig...

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# ?9 d! V9 G3 ^4 Y8 q乜咁快手ㄚㄚㄚㄚ
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個答案可以咁.....2 ?0 h7 j6 v+ |- e" \
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1.ab+bc-ac=0% ~9 f- L+ {3 W- ]* [5 v9 E" d8 N
a-c=1019 [4 H* }( z; W0 `; P! {
b=ac/(a+c)=(101c+c^2)/(101+2c); I/ |2 Y% U  ?+ v. n
設c=101n
# ~) [1 G# C" j- \0 m: \2 S+ }& `# a101n代入c
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8 Z8 d& s/ ^/ d2 p1 r[101^2*n+(101n)^2]/(101+202n)
8 d, S! v! w5 `1 `7 Q=[(101^2)n(n+1)]/[(101)(2n+1)]5 n* w% C% x5 B+ }9 |1 V  C
=[101n(n+1)]/(2n+1): d1 g. _3 j; ^9 m5 Z1 m" f# I+ o

% N' j8 a# q6 c) d1 ^因為a、b、c是正整數# s9 Y% W9 Q4 d( }' j9 _7 A- N
所以n是正整數& P( }- {1 O! Z6 x: p+ `
所以[101n(n+1)]/(2n+1)是整數
& r, z2 U. n# A' O  e- g+ `; m2n+1=101(剩下的2n+1=n或2n+1=n+1，n沒有整數解)
' D9 Y& p& x* Z, P0 Kn=50/ x3 V4 b; z' T$ D, @2 a; g
a=5151  <--a-c=101! f: R6 i$ }% R6 ]$ [
b=2550  <--[101n(n+1)]/(2n+1)' O& `1 y: o9 d- e4 _4 f8 S
c=5050  <--c=101n8 p* }0 Q* J2 c+ L$ d
答案:b=2550

playbr2

Originally posted by sakura310 at  12:27 AM:* O# f6 y, i" P) U0 x5 ^8 s
Filename: DSC01158.JPG5 q% M4 a! i1 k5 t4 O
Datetime | Downloaded by | Counts! m& ]% U8 Q7 m- w) h  B
2008-01-18 00:25:24 | 阿感 | 2- [- m  V* W5 [: v* s; P
2008-01-18 00:24:20 | playbr2 | 2
  ^1 D: l) u: ^# x- t+ N2008-01-18 00:22:02 | 但丁 | 28 B0 g& |, C' {, p# w& c

% k% M+ m9 z) c3 N. K1 n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! H, ~' Q; O/ t: b3 Y9 q' P& M
之後DL (就变成第二次)

playbr2

Originally posted by sakura310 at  12:27 AM:
* \: P) K8 q. S5 J( aFilename: DSC01158.JPG1 v* i4 {3 T/ F7 t4 }
Datetime | Downloaded by | Counts1 A0 L& O- R1 I
2008-01-18 00:25:24 | 阿感 | 29 L9 U4 I6 }9 C4 K7 ]9 i
2008-01-18 00:24:20 | playbr2 | 2
4 U2 A" e/ j: P) K- _2008-01-18 00:22:02 | 但丁 | 2
: p1 G2 a0 r' v  t8 ]1 F2 ~6 g, j  j- D/ F& Z; H7 m8 P
點解大家都down兩次? XD

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3 |; y' ]" I& p' o& n快d捉我錯處
5 l1 r! t6 V9 J4 u% {& \/ M6 `* D話吾定我都打錯 + - 符號- ^/ f4 S' ], Y/ v
係電腦打答案...的確幾煩...又哂時間...

playbr2

Originally posted by sakura310 at  10:22 AM:# y5 n1 ?$ V& P0 q7 V; g

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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:' o% h3 ?5 H: l$ \
捉錯處就唔敢當3 H' r% R8 C8 w# L7 B  r* b7 b
不過,c=101n哥度(解...

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" M% k6 t, d2 R7 P0 e, H3 A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; o: j- F9 Y: H( L1 n
反而適當地調節一下 , 咁會理性好多: `( P  C/ A* `5 z
就好似隻game 由12粒珠 加到13粒珠咁1 B+ j' r8 J9 @! S
當''堂''好玩哂
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1 b$ r- k+ A3 D4 kp.s. 求''堂''字正寫