来自万红运的问题
已知数列{an}满足,anan+1=n(n-1)(an+1-an),且a1=0,a2=1.(1)求证:数列{an}是等差数列;(2)设bn=2an-34,求数列{|bn|}的前n项和Sn.
已知数列{an}满足,anan+1=n(n-1)(an+1-an),且a1=0,a2=1.
(1)求证:数列{an}是等差数列;
(2)设bn=2 an-34,求数列{|bn|}的前n项和Sn.
1回答
2020-04-22 15:17