已知数列{an}满足a1=1,an+1= an/2an+1.(1)计算a2.a3.a4的值 (2)用归纳推测an,并用数
已知数列{an}满足a1=1,an+1= an/2an+1.(1)计算a2.a3.a4的值 (2)用归纳推测an,并用数
已知正项数列an满足Sn=1/2(an+1/an),求出a1.a2.a3.a4,并推测出通项an的表达式.
已知数列{an}满足:a1=1,且an-an-1=2n,求(1)a2,a3,a4.(2)求数列{an}的通项an
已知数列(an)满足a1=1,an+1=2an/an+2(n∈N*) 求a2,a3,a4,a5 猜想数列(an)的通项公
已知{an}满足a1=1,an+1=an/an+2(n属於N*) (1)求a2 a3 a4 (2)猜想数列{an}的通项
已知数列{an}满足a1+a2+a3+...+an=n^2+2n.(1)求a1,a2,a3,a4
已知数列{an}满足a1=2且anan+1-2an=0球a2,a3,a4的值
已知数列{an}满足:a1=1,且an-a(n-1)=2n.求a2,a3,a4.求数列{an}通项an
已知数列{an}满足:a1=2,an+1=3an+2(n€N) 求()a2 a3 a4的值
已知数列{An}满足a1=1,An+1=2An+1.求A1+A2+A3+…+An的值
数列{an}中,a1=3/5,a(n+1)=an/(2an+1),1,计算a2,a3,a4的值 2,猜想an的表达式并用
已知数列An为等比数列,公比q=-1/2,lim(a1+a2+a3+.an/a2+a4+.+a2n)的值