数列an满足sn=3an-1/2 计算a1,a2,a3,a4 猜an通项 求an前n项和sn

数列an满足sn=3an-1/2 计算a1,a2,a3,a4 猜an通项 求an前n项和sn 已知数列{an}满足:a1=3,an=Sn-1+2n,求数列an及sn 数列an满足a1=1/3,Sn=n(2n-1)an,求an 已知数列{an}满足,a1=2,a(n+1)=3根号an,求通项an数列{an}满足:an>0,且根号下Sn=an+1/4,求通项an 数列{an}满足Sn+Sn+1=5/3an+1,a1=4求an 已知数列{a}的前n项和Sn,通项an满足Sn+an=1/2(n^2+3n-2),求通向公式an 已知数列{an}满足a1=1,a(n+1)=3an+2,求数列{an}的前n项和Sn.求数列{an}的前n项和Sn. 已知数列{an}a1=2前n项和为Sn 且满足Sn Sn-1=3an 求数列{an}的通项公式an已知数列{an}a1=2前n项和为Sn 且满足Sn +Sn-1=3an 求数列{an}的通项公式an 设数列an的前n项和为Sn,满足an+sn=An^2+Bn+1(A不等于0)an为等差数列,求(B-1)/A 已知数列(An)的前n项和为Sn满足.Sn=3╱2An＋n-3 求证,数列(A已知数列(An)的前n项和为Sn满足.Sn=3╱2An＋n-3 求证,数列(An-1)是等比数列,急,亲快点帮我解决, 已知数列an满足a1=1,a（n+1）=an/{3（an）+1} Sn=a1a2+a2a3+.+an（an+1）,求Sn已知数列an满足a1=1,a（n+1）=an/{3（an）+1}Sn=a1a2+a2a3+......+an（an+1）,求Sn 已知数列｛an｝的通项公式an与前n项Sn公式之间满足Sn=2-3an求1）数列｛an｝的通项公式 2）数列｛an｝的前n项和Sn 已知数列{an}满足a1=1/2,sn=n^2an,求通项an 已知数列{an},满足a1=1/2,Sn=n²×an,求an 已知数列an满足a1=1/2 sn=n平方×an 求an 已知数列An满足 A1=1/2 Sn=N²An 求An 已知数列an满足a1=1 Sn=2an+n 求an 已知数列{an}的前n项和Sn满足Sn=2/3an-1/3,且1