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5.1.2数列中的递推

基础过关练

考点一数列的递推关系及其应用

1.已知数列{an}满足an+1=(-1)nan+1,且a2=1,则a6=()

A.-1B.0C.1D.2

2.若数列{an}满足an+1=11-an,a1=2,则a

A.2B.-1

C.12

3.已知数列{an}满足an+1=nn+2an,且a1=1,则a

A.2(n+1

C.12n

4.已知数列{an}满足a2=0,a2n+1=a2n+1n,a2n+2=a2n+1-1n+1(n∈N+),则数列{an}的第2

A.20232

C.1011

5.(多选题)已知