来自黄金贵的问题
已知数列{an}满足a1=1,an+1=2an+3.(Ⅰ)证明{an+3}是等比数列,并求{an}的通项公式;(Ⅱ)令bn=log2(an+3),求数列{1bn•bn+1}的前n项和Tn.
已知数列{an}满足a1=1,an+1=2an+3.
(Ⅰ)证明{an+3}是等比数列,并求{an}的通项公式;
(Ⅱ)令bn=log2(an+3),求数列{1bn•bn+1}的前n项和Tn.
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2020-12-2006:43