a1=3 2an+1=an+1

数列an中,a1=3,an+1=an/2an+1,则an=? 数列｛an｝中,a1=1/2 3an*an-1+an-an-1=0,通项公式an 在数列an中,a1=1,an=3an-1+2则an= 已知数列{an}中,a1=1/2,an+1+3an=0,an=( ) 已知｛an｝,a1=1,an+1=2/3an+1,求an an+1 ,n+1是下表 ,an+1=an^3 a1=2 ,求an 数列｛an},a1=1,an+1=2an-n^2+3n,求｛an｝. 数列｛an｝满足a1=1,且an=an-1+3n-2,求an a1=1 an+1=an/2an+3,用两种方法求an加急加急! a1=3,an=2an-1+3 证{an+3}等比,并求an 在数列an中,a1=2 an+1=an+3n则an= a1=3,an+1=3an/an+2,求an a1=2 an+1=3an/an+3 求an 在等差数列an中,a1=2,3an+1-an=0,求an 在数列{an}中,a1=3,An+1=an^2求an. 已知{an}满足a1=1.an=3*n+2An-1,求an 数列{An}满足a1=1/2,a1+a2+..+an=n方an,求an a1=3 2an+1=an+1