已知数列｛an｝满足a1=4,an+1=2an/(an+2),

已知数列{an}满足an+1=2an+3.5^n,a1=6.求an 若数列{An}满足An+1=An^2,则称数列{An}为“平方递推数列”,已知数列{an}中,a1=9,点（an,an+ 数列an满足a1=2,an+1=4an+9,则an=? 已知数列an满足a1=1\2 an+1=an+1\4n平方-1 则an 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a1=1,1/an+1=根号1/an^2+2,an>0,求an 已知数列{an}满足a1=2,an+1=2an/an+2,则an等于多少 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=2,an+1-an=an+1*an,那么a31等于 已知数列{An}满足A1=1,An+1=2An+2^n.求证数列An/2是等差数列 已知数列{an}满足an=2an-1+2n+2,a1=2 已知数列{an}满足a1=1/2,an+1=3an+1,求数列{an}通项公式