数列an满足递推式an=3an-1+3^n-1,n大于等于2,其中a1=5,则使得{an+入、3……n}为等差数列的实数入=-------------

已知数列{an}满足a1=1 an+1=an/(3an+1) 则球an 数列｛an｝满足a1=1,且an=an-1+3n-2,求an 数列[An]满足An+1-An+3=0,且A1=-5.求An. 已知数列an满足 a1=1/2,an+1=3an/an+3求证1/an为等差数列已知数列an满足 a1=1/2,an+1=3an/an+3求证1/an为等差数列 已知数列{an}满足a1=1,a2=3,an+2=3an+1-2an求an 已知数列{an}满足a1=1/2,an+1=3an+1,求数列{an}通项公式 数列an满足a1=1/2 an+1=an/(2an+3) 猜想数列通项公式 已知数列[an]满足An+1=1+an /3-an ,且a1=1/3,求证数列[1/(an -1）]是等差数列,并求an 数列an满足a1=1,a2=1/3,并且an(an-1+an+1)=2an+1an-1.则数列第2012项为? 数列{an}满足a1=a,an+1=1+1/an.若3/2 数列an满足a1=1/3,Sn=n(2n-1)an,求an 数列{an}满足Sn+Sn+1=5/3an+1,a1=4求an 已知数列{an}满足3an+1+an=4,a1=9,求通项公式. 数列[An]满足a1=2,a（n+1）=3an-2 求an 已知数列an满足a1=0,an+1=an-根号3/根号3an+1,则a2012= 已知数列｛an｝满足a1=4/3,且an+1=4（n+1）an/3an+n 已知数列an满足a1=1,a2=3,an+1.an-1=an,求a2013 已知数列an满足a1=1,a(n+1)=an/(3an+2),则an=?