如果函数
满足:对于任意给定的等比数列
仍是等比数列,则称
为“保等比数列函数”.在下列函数中所有“保等比数列函数”的序号为______
①
②
③
④
⑤
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3cb82ed4646a6a20b43fa68496e9ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/604f2c91b49b94c2eba048d8891703c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa5534f1143d7d388ccf966aed76fdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a17b65f69c3aad510f559a2e6e6c5d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eee713b5741ec52c8310ddb64bc0b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43434146781cab266f6dcf338fc5bef8.png)
2019·北京房山·一模 查看更多[4]
【区级联考】北京市房山区2019届高三第一次模拟测试数学(文科)试题(已下线)2019年9月16日 《每日一题》必修5—— 等比数列的定义辽宁省实验中学东戴河分校2019-2020学年高二上学期10月月考数学试题内蒙古呼和浩特市第十六中学2020-2021学年高二上学期期中考试数学(理)试题
更新时间:2019-04-28 15:14:05
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【知识点】 由定义判定等比数列
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,
,
,
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______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d306f8de449c33f79ff2a38d2fc0cb.png)
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【推荐2】设数列
的前
项和为
,已知
,
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的前
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________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
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