来自吕碧波的问题
已知数{an}的前n项和为Sn,且满Sn=2an-n(n=1,2,3_)(1)a1,a2,a3的值;(2)求证:数列{an+1}是等比数列;(3)bn=nan,求数{bn}的前n项Tn.
已知数{an}的前n项和为Sn,且满Sn=2an-n(n=1,2,3_)
(1)a1,a2,a3的值;
(2)求证:数列{an+1}是等比数列;
(3)bn=nan,求数{bn}的前n项Tn.
1回答
2020-11-1802:48