٥륯åĥ
66礫׻Ƥޤ
1010ڡ 0:09:35 48460
Mr.ǥ
٥륯åĥͤΡ#48460ƱǤ
1010ڡ 0:19:12 48461
⡼ޥ
ƱǤä ^^
Ǹ6礫...
6*(7/6)+5=12
12*(7/6)+4=18
18*(7/6)+3=24
24*(7/6)+2=30
30*(7/6)+1=36

äȥޡȤȯۤꤽʵ⤹...?
1010ڡ 0:22:21 48462
٥륯åĥ
ï񤤤Ƥʤ褦ʤΤǰ
ʢʡʤ뤤Ͼ޶ˤǤϤʤǤ礦
1010ڡ 0:22:55 48463
ǯ
̾1ǤΩʡ
1010ڡ 0:30:27 48464
å
ͭ̾䤤Ǥ
nܤοͤnȤλĤ1/mȤߤ(m-1)^2ˤʤޤ
ȡ郎ȴƤȻפΤǤǽŪƱζߤäȤդƤȻפޤ
1010ڡ 0:47:19 48465
٥륯åĥ
#48464ǯԤ
3̤οͤ3+Ĥ1/7äȤΤ1ϤʤΤǤϡ

ˤƤƱˤʤΤ򤤷̤Ǥ͡
1010ڡ 1:42:25 48466
ǯ
#48466٥륯åĥ
ߤޤ󡣥硼ΤĤǽ񤤤Τǡ
;ꤳĤϤʤΤǤ
֤äפȤϽ񤤤Ƥʤ֤餦ȤǤפȤ롼Τߤ񤫤Ƥޤ
1010ڡ 2:06:32 48467
٥륯åĥ
#48467ǯԤ
硼äΤǤ͡餳ߤޤ
1010ڡ 2:19:42 48468
ֿء׾ι
6̤6礫ջޤ
1010ڡ 3:34:36 48469

ȤǤ
߷
1̡n^2-1 = (n+1)(n-1)n
2̡n^2 -n-2 = (n+1)(n-2)2n
3̡n^2 -2n-3 = (n+1)(n-3)3n



k̡n^2-(k-1)n-k = (n+1)(n-k)kn



(n-1)̡n^2-(n-2)n-(n-1) = (n+1)1(n-1)n
n̡n^2-(n-1)n -n = (n+1)0n^2

ȤȤˤʤäƤޤ͡
ȤϤ狼ޤɬפĽʬʤΤϤɤΤʬޤ󡣡

1010ڡ 9:43:04 48470
ˤ
1̤ȣ̤ǡ6a-7b=2a=5,b=4ΤȤ36ǰʲޤ
Ķļˡ 1010ڡ 10:20:41 48471

1̤οͤäĤ6ܿǡ2̤οͤǽ˼27ܿȤȤˤʤ롣
6ܿ27ܿˤʤ־30
ξǻȤޤԤΤ36ȤɡʳˤϤʤɤϤɤͤФΤ狼ʤä
1010ڡ 11:22:16 48472

nܤޤǶߤäΤ
1 + 2*(7/6) + 3*(7/6)^2 + + n*(7/6)^{n-1}
򥴥ꥴ׻
7(n-6)*(7/6)^{n-1} + 36
줬ˤʤΤ n=0 or 1 or 6 ΤߤǤ
1010ڡ 11:48:26 48473
Ϸ
դ顢ͤˤ̤ο̤Ԥˤ1/7ο̤ȤιפĤȤʤޤ
ǸοͤϣĤ館ޤʤĤޤԤ6/7ˤ1/7ʬ0ĤǤ
äƽ̤2Ĥ6ĤޤǤޤ̤ȣġ1̤οͤοˤ­ޤ
ߣܣᣳ
ȱΤϤɤǤ礦
1011ʶ 16:29:42 48474
fumio
̵Ƥޤ
Ǥ
ĤʤäƤޤǤϤǤϤޤ͡
1012ڡ 0:44:22 48475
baLLjugglermoka
ǥ٥ߤ¿ȯ᤮3Ϣ١
1012ڡ 13:17:16 48476
ˤ
ϡԤȾǤ
Ķļˡ 1012ڡ 14:24:15 HomePage:ޤޤ48477
Ҥ
򤤤Ūˣ̤飶̤ޤǤߤʣ
1015ʲС 19:12:53 48478