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已知等差数列{an}满足a1=1,an+2﹣an=6,则a11等于(  )A.31  B.32  C.61  ...

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已知等差数列{an}满足a1=1,an+2﹣an=6,则a11等于(  )A.31  B.32  C.61  ...

已知等差数列{an}满足a1=1,an+2﹣an=6,则a11等于(  )

A.31   B.32   C.61   D.62

【回答】

A【考点】等差数列的通项公式.

【分析】由等差数列的*质依次求出a3,a5,a7,a9,a11.

【解答】解:∵等差数列{an}满足a1=1,an+2﹣an=6,

∴a3=6+1=7,

a5=6+7=13,

a7=6+13=19,

a9=6+19=25,

a11=6+25=31.

故选:A.

知识点:数列

题型:选择题

标签:AN2 a11 an6