数列{An}满足An=3An-1+3^n-1(n≥2),其中A4=365.求证数列{an-3^n}不是等差数列

已知数列{an}满足a1=3 an*a(n-1)=2a(n-1)-1,求证数列{1/(an-1)}是等差数列,并求出数列 已知数列{an}满足a1=2,a(n+1)=(3an-2)/(2an-1),求证{1/(an-1)}是等差数列,并求数列 已知数列{An}满足A1=1,An+1=2An+2^n.求证数列An/2是等差数列 已知数列{an}满足a1=1,a(n+1)=3an+2(n属于N) 1.求证数列{an+1}是等比数列 2.求{an}的 数列｛an｝满足a1=1,且an=an-1+3n-2,求an 数列{an}满足a1=1,an=3n+2an-1(n≥2)求an 已知数列{an}满足an+an+1=2n+1（n∈N*），求证：数列{an}为等差数列的充要条件是a1=1． 数列{an}满足=3an-1+3^n-1,(n≥2),a4=365,an的前n项之和为Sn,求Sn 数列an满足an+1=3an+n,是否存在适当的a1,使{an}是等差数列,说明理由 已知数列an满足a1=1,an+小1=3an+2*3^n,求证{an/3^n-1}成等差数列,求an的通项公式,求an的 已知在数列an中,Sn=2n^2+3n,求证an是等差数列 已知数列{An}满足:A1=3 ,An+1=(3An-2)/An,n属于N*.1）证明：数列{（An--1）/（An--