数列{an},a1=1,an+1=2an-n^2+3n,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
数列{an}中,a1=35,an+1-an=2n-1,求an
已知数列{an}满足an+1=2an+3.5^n,a1=6.求an
数列{an}满足a1=1,an=3n+2an-1(n≥2)求an
在数列an中,a1=2 an+1=an+3n则an=
已知数列{an}满足a1=1,an=(an-1)/3an-1+1,(n>=2,n属于N*),求数列{an}的通项公式
设数列{an}中,a1=2,a(n+1)=an+n+1,求an
数列{an}满足a1=1 an+1=2n+1an/an+2n
设数列{an},a1=3,an+1=3an-2(n∈N*)
已知数列{An}首项A1=2/3,An+1=2An/An+1,求数列{n/An}的前n项和Sn
数列{an}中,a1=2,an+1-an=3n∈N*,求数列{an}的通项公式an.