已知数列{an}满足a1=1,an+1=an+2n,则a10=______.-数学

题目简介

已知数列{an}满足a1=1,an+1=an+2n,则a10=______.-数学

题目详情

已知数列{an}满足a1=1,an+1=an+2n,则a10=______.
题型:填空题难度:中档来源:不详

答案

∵数列{an}满足a1=1,an+1=an+2n,
∴an=a1+(a2-a1)+…+(an-an-1)=1+21+22+…+2n-1=
2n-1
2-1
=2n-1.(n∈N*).
∴a10=210-1=1023.
故答案为:1023.

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