已知数列{an},an=2n-1,{an}和{bn}满足等式an=b1/2+b2/2平方+b3/2三次方+.bn/2的n次方,求{bn}的前n项和Sn

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,an^2 +1/an=2n,求an 已知数列an,an属于n*,sn=1/8*(an+2)^2,{an}是等差数列 “已知数列{an}中,an>0,Sn是数列{An}中的前n项和,且An+1/An=2Sn”An>0,求An 已知数列｛an｝中,a(n+1)=an+2^n,a1=3,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},An+1=2（n+1）+An,求数列An通向求详解 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｝满足2an/an+2=an+1(n属于正整数）,a1=1/1006.求证：数列｛1/an｝是等差数列,并求通项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},A1=1 A(n+1)=2an/an+2 求a5 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满足an=1+2+...+n,且1/a1+1/a2+...+1/an