1 . 数列
满足
,
,
是
的前
项和,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b5245eea94925f7321e9fbf667b1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1875bd4e0010ebed22cd44aec5b2f92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.![]() ![]() |
B.![]() |
C.![]() |
D.对于两个正整数![]() ![]() ![]() ![]() |
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2 . 如图给出了3层的六边形,图中所有点的个数
为28,按其规律再画下去,可以得到
层六边形,则
可以表示为( )
![](https://img.xkw.com/dksih/QBM/2021/5/25/2728579158622208/2800345819947008/STEM/34706061-4cea-415a-b39c-1b0e42c43ecb.png?resizew=301)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://img.xkw.com/dksih/QBM/2021/5/25/2728579158622208/2800345819947008/STEM/34706061-4cea-415a-b39c-1b0e42c43ecb.png?resizew=301)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2021-09-03更新
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490次组卷
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4卷引用:重庆市缙云教育联盟2021-2022学年高一上学期12月月考数学试题
重庆市缙云教育联盟2021-2022学年高一上学期12月月考数学试题陕西省宝鸡市金台区2020-2021学年高二下学期期中理科数学试题陕西省渭南市富平县2021-2022学年高二下学期期末文科数学试题(已下线)专题10 数列通项公式的求法 微点10 数列通项公式的求法综合训练