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)=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 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=2,a（n+1）=3an-2 求an 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｝满足a1+2a2+3a3+.+nan=n(n+1)(n+2)求通项an 设数列{an}满足a1=2,a(n+1)-an=3乘以2的（2n-1}次方 1.求数列的通项公式； 2.令bn=n乘以an,求数列前n项和 设数列an满足a1+3a2+3^2a3+……+3^(n-1)an=n/3,a是正整数,设bn=n/an,求数列bn的前n项和 数列｛an｝满足a1=3,a n+1=2an,则a4等于 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? 数列{an}满足a1=2,a(n+1)=2an+n+2,求an 设数列{an}满足a1=a,an+1=can+1-c,n∈N*,其中a,c为实数,且c≠0,a≠11)求证{an-1}是等比数列2)求数列{an}的通项公式3)设a=1/2,c=1/2,bn=n(1-an),n∈N*,求证数列{bn}的前n和sn＜2设数列{an}满足a1(第一项)=a,an+1(第n+1 设数列an满足a1+2a2+3a3+.+nan=2^n 1求数列a的通项 2设bn=n^2an 求数列的前n项和Sn求大神帮助 设数列AN满足A1=2,A(N+1)-AN=3X2^(2N-1)?(1)求数列AN的通项公式2,令BN=N AN ,求BN前N项和SN 设数列{an}满足a1=2,a(n+1)-an=3*2^2n-11)求数列{an}的通项公式2）令bn=nan,求数列{bn}前n项和Sn 已知函数f（x）=x/（x+1）,若数列｛An｝（n属於正整数）满足A1=1,A（n+1）=f（An）(1)设bn=1/An,求证数列｛bn｝是等差数列,（2）求数列｛An｝的通向公式An（3）设数列｛Cn｝满足：Cn=2^n/An,求数列｛C 数列{An}满足A1=1,A(n+3)=An+3,A（n+2)=An +2 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