已知数列{an}满足lim[(2n-1)an]=2,则lim(n+2)an=
人气：215 ℃ 时间：2020-06-04 08:51:07
解答
lim[(2n-1)an]=2
lim[(2n-1)an] /[(n+2)an ]= lim (2n-1) / (n+2) = 2
=> lim(n+2)an = 1
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