a1=1,a(n+1)=3an求an

数列{an},a1=3,an*a(n+1)=(1/2)^n,求an 在数列｛an｝中,a1=3,a(n+1)=an+n,求an 已知数列｛an｝中,a(n+1)=an+2^n,a1=3,求an 数列{An},A1=1,A(n+1)=3An+4.求An和Sn. a(n+1)=2an/3an+4,a1=1/4,求an 在数列{an}中.a1=3且a(n+1)=an^2,求an 数列[An]满足a1=2,a（n+1）=3an-2 求an 数列｛an},a1=1,an+1=2an-n^2+3n,求｛an｝. 已知a1=2 a(n+1)=2an+2^n+3^n 求an 数列{an}满足a1=2,a(n+1)=2an+n+2,求an 已知数列｛an｝中a1=1/2,a(n+1)=(2an)/(4an+3),求an. 在数列{an}中,a1=3,a(n+1)=（3an+4)/(an+6),求an. an中,a1=2,a(n+1)=3an+3(n+1)次方-2n次方,求an 1、在数列{an}中,a1=1.a(n+1)=3an+2n+1.求an.2、在数列{an}中,a1=-1,a(n+1)=(3an-4)/[(an)-1].求an. a(n+1)=an-2*3(n次方)+1,a1=3,求an a1=1,an+1=an/(3+an),求an=?（n为下标） an+1 ,n+1是下表 ,an+1=an^3 a1=2 ,求an a1=3 a(n+1)=3an+n 求an