已知{an}中,an＞0,Sn是{an}的前n项和,且an+1/an=2Sn,求an.

已知{an}中,an＞0,Sn是{an}的前n项和,且an+1/an=2Sn,求an. “已知数列{an}中,an>0,Sn是数列{An}中的前n项和,且An+1/An=2Sn”An>0,求An 已知数列{an}中,an＞0,Sn为{an}的前n项和,且an+1/an=2Sn,求an. 已知数列{an}中,an＞0,Sn为{an}的前n项和,且an+1/an=2Sn,求an. 已知数列{an}中,an＞0,Sn=a1+a2+.+an,且an=6Sn/(an+3),求Sn. 已知数列{an}中,an>0,s=a1+a2+.+an,且an=6sn/(an+3),求sn 已知数列An中,an>0,Sn是前n项和,且An+An分之一=2Sn,求An通项公式 已知数列 an＞0 an+1/an=2Sn 求an 已知数列{an}中,an>0,前n项和为Sn,且满足Sn=1/8(an+2)^2.求证数列{an}是等差数列. 已知数列{an}中,an>0,Sn=a1+a2+……+an,且an=6Sn/（an+3) 求Sn 感激 已知等比数列{an}中,an≠0,求lim(an/Sn) 在{an}中an>0 Sn=1/2（an+n/an）求an 已知数列an,an>0,Sn=a1+a2+a3.+an,且an=6Sn/an + 3,求Sn!已知数列an,an>0,Sn=a1+a2+a3.+an,且an=6Sn/an + 3〔不是a（n+3）,是an + 3,〕求Sn! 已知{an}是等比数列,an>0,sn=a1+a2+.an,Tn=1/a1+1/a2+.1/an,求证a1a2.an=(sn/Tn)^n/2 已知数列{an}中a1=1,且满足an+an-1不等于0,Sn=1/6*(an+1)(an+2).(1)求通项an,并说明{an}是什么数列(2)求数列{an}的前n项和Sn 已知数列{an}中,an>o,且2Sn=an2+an,求an 已知数列an,an属于n*,sn=1/8*(an+2)^2,{an}是等差数列 已知数列{An},Sn=0.125（An+2)(An+2).求证：{An}是等差数列