已知数列an,a1=1,n+1=2an/an+1,求a5rt

已知数列an,a1=1 an+1-an=2的n次幂求an 已知数列{an}满足an+1=2an+3.5^n,a1=6.求an 已知数列｛an｝中,a(n+1)=an+2^n,a1=3,求an 几个数列问题.已知数列{an} a1=1,an+1=an/(1+n^2*an) 求an 已知数列{an} 满足a1=1 a1*a2*a3.*an=n^2 求an 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},a1=2,an+1=an+2n,则数列的通项公式an=? 已知数列{an},a1=1,an+1-an=2^n,求数列{an}通项公式 已知数列｛an}中a1=2,an+1-an=3n,求数列｛an}的通项公式. 已知数列an中,a1=1,an/an-1=n+1/n,n大于等于2,求an 已知数列{an}中,a1=1,an+1=an+2n-1,求通项公式 已知数列an,a1=1,n+1=2an/an+1,求a5rt 已知数列{an},A1=1 A(n+1)=2an/an+2 求a5 已知数列an满足an=1+2+...+n,且1/a1+1/a2+...+1/an 已知数列{an}满足a1=1,an+1·an=2^n 则s2012 已知数列{an},an=2^n,则1/a1+1/a2+...+1/an等于多少? 已知数列{an}满足a1=1/2,sn=n^2an,求通项an 已知数列{an}中,a1=1,a1a2a3……an=n^2,求an 已知数列{an},满足a1=1/2,Sn=n²×an,求an