设数列an满足：a1=1,an+1=3an,n属于正整数,求an的通项公式和前n项和Sn

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等于1,3(A1+a2+~+AN)=(n+2)an,求通向公式 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 已知数列{an}满足a1=1 an+1=an/(3an+1) 则球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=2,a(n+1)-an=3x2的2n-1次方,求数列an的通项公式 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 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,a(n+1)=an/(3an+2),则an=? 数列{an}满足a1=3/2,an+1=an2-an+1,求证：1/an=1/(an)-1 - 1/(an+1)-1数列{an}满足a1=3/2,an+1=an2-an+1,求证：1/an=1/(an)-1 - 1/(an+1)-1设Sn=1/a1+1/a2+...+1/an,n>2证明1 设数列{an},a1=3,a(n+1)=3an -2 (1)求证:数列{an-1}为等比数列 设数列,a1=3,an+1=3an-2,求数列an是等比数列 设数列【an】满足a1=1,3（a1+a2+a3+······+an）=（n+2）an,求通项an 数列 (10 18:35:56)设数列{an}满足a1=9,an+1=-1/2an+3,求an的通项公式（含过程） 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