已知a1=1,2an+1*an+3an+1+an+2=0 求证｛1/an+1｝为等差数列(2)求an

已知a1=1,2an+1*an+3an+1+an+2=0 求证｛1/an+1｝为等差数列(2)求an 已知数列an满足 a1=1/2,an+1=3an/an+3求证1/an为等差数列 在等差数列an中,a1=2,3an+1-an=0,求an 已知数列{an}满足a1=2,an+1=2an/an+2.求证数列{1/an}是否为等差数列 并求出an 已知等差数列{an}中,a1=2.an+1=an+3分之an 求an 已知数列an满足an+1=3an/an+3求证{1/an}是等差数列.当a1=1/2时求a100 已知数列{an}满足an+1=(3an+1)/(an+3),a1=-1/3 求证1/(an)+1为等差数列,求an 已知a1=2,an不等于0,且an+1-an=2an+1an,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}满足a1=1,an+1=2an+1 1）求证：数列{an+1}为等比数列； 2) 求{an}的通项an 已知数列{an}中,a1=-1,a2=4,an+2+2an=3an+1 求证：数列{an+1-an}是等比数列,并求{a 已知数列{an}满足a1=2,a(n+1)=(3an-2)/(2an-1),求证{1/(an-1)}是等差数列,并求数列