在数列{an}中,a2+1是a1与a3的等差中项,设=(1,2),=(an,an+1),且满足∥. (1)求数列{an}的通项公式; (2)记数列{an}的前n项的和为Sn,若数列{bn}满足bn=anlog2(sn+2),试求数列{bn}的前n项的和Tn. |
与“在数列{an}中,a2+1是a1与a3的等差中项,设x=(1,2),y=(an,an+1),且满足x∥y.(1)求数列{an}的通项公式;(2)记数列{an}的前n项的和为Sn,若数列{bn}满足bn=anlog2(sn+2),试”考查相似的试题有: