已知数列{an}满足a1=1,an=3(次方n-1)+a(项数n-1)（n≥2） 求an...

已知数列{an}满足a1=1 an+1=an/(3an+1) 则球an 已知数列{an}满足3an+1+an=4,a1=9,求通项公式. 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=1/2,an+1=3an+1,求数列{an}通项公式 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an+1=an+n,a1等于1,则an=? 已知数列{an}满足an+1=2an+3.5^n,a1=6.求an 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 已知数列an满足a1=1,a(n+1)=an/(3an+1) 求数列通项公式 已知数列{an}满足:a1=3,an=Sn-1+2n,求数列an及sn 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=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=? 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,an+1=3an+1,证明｛an+½｝是等比数列 已知数列{an}满足a1=1 ,an+1=3an+2的n+1次幂,求an 已知数列（an）满足a1=1.an+1=3an+2n-1,求an 已知数列{an}满足a1=4,3an=5an(n下-1) +1,求an