已知数列an满足,a1=1,an＞0且a（n+1）×更号下（4+1/an^2）=1（n∈N+）①求数列an的通项公式②数列bn的前n项和Sn满足S（n+1）/an^2=Sn/a（n+1）^2+16n^2-8n-3,若数列bn是等差数列,求b1③在②的条件下,设cn=

已知数列{an}满足,a1=2,a(n+1)=3根号an,求通项an数列{an}满足:an>0,且根号下Sn=an+1/4,求通项an 已知数列{an}满足,an+2=an+1-an,且a10=-1,a9=0,求a1 已知数列{an}中满足(An+1-An)(An+1+An)=16,且a1=1,an 已知数列an中满足a1=1且当n.=2时,2an*a*(n-1)+an-a(n-1)=0,求通项公式an 已知数列{an}满足3a(n+1)=2an-4,且a1=1/5,求an 已知数列｛an｝满足a(n+1)=an+3n+2,且a1=2,求an=? 已知数列an满足a(n+1)=an+3n+2,且a1=2,求an 数列[An]满足An+1-An+3=0,且A1=-5.求An. 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An+1=2^nAn,且A1=1,则通项an 已知数列｛an｝满足an=an+1 -lg2,且a1=1,则通项公式为? 已知数列{an}满足：an+1=an+n,且a61=2002,则a1等于 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a(n+1)=2an-an²/2,a1=1,求证an≤2且求an的通项公式 已知数列{an}中a1=1,且满足an+an-1不等于0,Sn=1/6*(an+1)(an+2).(1)求通项an,并说明{an}是什么数列(2)求数列{an}的前n项和Sn 已知数列满足a1=1/2,an+1=2an/(an+1),求a1,a2已知数列满足a1=1/2,a(n+1)=2an/(an+1),求a1,a2;证明0 已知数列{an}满足a(n+1)=an+n,a1=1,则an= 已知数列{an}满足a(n+1)=an+lg2,a1=1,求an