数列{an}满足a1,a2-a1,a3-a2,…,an-an-1是首项为1,公比为2的等比数列,那么an等于( )
A.2n-1 | B.2n-1-1 |
C.2n+1 | D.4n-1 |
17-18高二·全国·课后作业 查看更多[1]
(已下线)第1章 习题课(2)(课时作业)-2018-2019版数学创新设计课堂讲义同步系列(北师大版必修5)
更新时间:2019-01-14 17:20:26
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【推荐1】蜜蜂被认为是自然界中最杰出的建筑师,单个蜂巢可以近似地看作是一个正六边形,如图为一组蜂巢的截面图.其中第一个图有1个蜂巢,第二个图有7个蜂巢,第三个图有19个蜂巢,按此规律,以
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【推荐2】已知数列
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