1 . 已知数列
的各项均为正数,其前n项的积为
,记
,
.
(1)若数列
为等比数列,数列
为等差数列,求数列
的公比.
(2)若
,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/716c5a425d043483c598d4f7e401a16a.png)
①求数列
的通项公式.
②记
,那么数列
中是否存在两项
,(s,t均为正偶数,且
),使得数列
,
,
,成等差数列?若存在,求s,t的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23469af3e5be16af7fb4a5d3edca2652.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57165b3c8ffeee6e8372ea0daebee44b.png)
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/716c5a425d043483c598d4f7e401a16a.png)
①求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
②记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe62e27d9f294191ef325ca302b79515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efafd4bd96fe69a11444e6662fd0c415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f09f29bb529ab9967a275b26e150c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d4ad9afdd266c6d38421bdfccd45e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31b6a20fe07023d2f1c386a7cb73d58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b924cf3c2252a73ec6809ca262643f7.png)
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2020-05-14更新
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5卷引用:2020届江苏省高三高考全真模拟(六)数学试题
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