已知数列{an}满足a1=1/5,且当n>1,n属于正整数时,有an不等于0,4*an*an-1=(an-1)-an

已知数列an中,a1=1,an+1=2an/an+2(n属于正整数),求通项公式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 已知数列{an}中,a1=1,满足an+1=an+2n,n属于N*,则an等于 数列｛an｝满足a1=1,且an=an-1+3n-2,求an 已知数列{An}满足:A1=3 ,An+1=(3An-2)/An,n属于N*.1）证明：数列{（An--1）/（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=an+n,a1等于1,则an=? 已知数列{an}满足an+1=2an+3.5^n,a1=6.求an 已知数列{An}满足A1等于5分之1,且当n〉1,n属于正整数时 已知数列{an} 满足a1=1/5,且当n>1,n∈N+时, 已知数列an满足a1＝1/5,且当n>=2,n属于正整数时,有(a(n-1))/(an)=(2a(n-1)+1）/(1-