设数列【an】满足a1=1,3（a1+a2+a3+······+an）=（n+2）an,求通项an

设数列AN满足A1等于1,3(A1+a2+~+AN)=(n+2)an,求通向公式 设数列an满足a1=2,a(n+1)=3an+2^(n-1),求an2,设数列an满足a1=2,a(n+1)=3an+2n,求an 设数列an满足a1=2,a(n+1)-an=3x2的2n-1次方,求数列an的通项公式 数列{an}满足a1=a,an+1=1+1/an.若3/2 数列[An]满足a1=2,a（n+1）=3an-2 求an 设数列{an}满足lg(1+a1+a2+...+an)=n+1,求通项公式an 设数列【an】满足a1=1,3（a1+a2+a3+······+an）=（n+2）an,求通项an 数列｛an｝满足a1=3,a n+1=2an,则a4等于 已知数列{an}满足a1=1,3a(n+1)+an-7 已知数列an满足a1=1,a(n+1)=an/(3an+1) 求数列通项公式 数列{an)满足an=4a(n-1)+3,a1=0,求数列{an}的通项公式 设数列{an}满足：a1+a2/2+a3/3+a4/4……+an/n=An+B,其中A、B为常数.数列{an}是否为等差数列? 设数列an满足a1=1,a2=4,a3=9,an=a(n-1)+a(n-2)-a(n-3).则a2011= 设数列{an},a1=3,a(n+1)=3an -2 (1)求证:数列{an-1}为等比数列 已知数列{an}满足对任意的正整数n,都有an>0,且a1^3+a2^3+..an^3=(a1+a2..an)^2,设数列｛1/an*an+2｝设数列｛1/an*an+2｝的前n项和为Sn,不等式Sn>1/3loga(1-a)对于任意正整数n恒成立,求实数a的取值范围 已知数列{an}满足a1=1 an+1=an/(3an+1) 则球an 数列的填空题设数列{an}满足a1=6,a2=4,a3=3,且数列{a(n+1)-an}是等差数列,则数列{an}的通项公式为? 设数列｛an｝满足a1+2a2+3a3+.+nan=n(n+1)(n+2)求通项an