已知数列an满足a1=2和3An+1=an,n=1,2·······,若bn=an+n,n=1,2·····,

已知数列{an}满足an+1=[(n+1)/2n]·an,且a1=1/2,则其通项an=? 已知数列{an}满足：a1=3/2,且an=(3n·an-1)/(2an-1+n-1)(n≥2,n∈N*).（1）求数列 设数列｛an｝满足a1=2,an+1-an=3·2^(2n-1) 已知函数f(x)=3(x-1)/2,若数列an满足a(n+1)=f(an)·a1=2 (1)求an (2)若bn=(an 数列{an}中,a1+a2+a3···+an=2n+1(n∈N※),求an 设数列【an】满足a1=1,3（a1+a2+a3+······+an）=（n+2）an,求通项an 高一数列题(+15)数列{An}满足A1=1,A(n+1)=An+2(1)设Bn=1/An·A(n+1),求数列{Bn} 已知数列an的前n项和为Sn,且满足an+2Sn·S(n-1)=0(n≥2),a1=1.5 设数列an满足a1=a2=1,a3=2,且对正整数n都有an·an+1·an+2·an+3=an+an+1+an+2+a 设 数列an满足a1=2,a(n+1)-an=3·2^(2n-1) (1)求数列an 的通项公式 若数列{an}满足a1+3a2+3²a3+···+3^n-1an=n/2 则an= 已知数列{An}、{Bn}满足a1=1/2 b1=-1/2 且对任意m、n∈N+,有Am+n=Am·An,Bm+n=Bm