已知数列{an}满足a1=,an=an-1+(n≥2,n∈N*),数列{bn}的前n项和Sn,满足:Sn=(bn-1). (I)求数列{an}、{bn}的通项公式an,bn; (II)设cn=an,①求数列{bncn}前n项的和Tn,②求数列前n项的和An. |
与“已知数列{an}满足a1=12,an=n2n2-1an-1+n2n+1(n≥2,n∈N*),数列{bn}的前n项和Sn,满足:Sn=23(bn-1).(I)求数列{an}、{bn}的通项公式an,bn;(II)设cn=2nan,①求数列{bncn}前n”考查相似的试题有: