数列
的通项公式为
,若数列
为递减数列,则
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e1a7ab79ca76c396046a56098f50e8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
2023高三·全国·专题练习 查看更多[2]
更新时间:2022-11-17 09:50:33
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【知识点】 根据数列的单调性求参数
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【推荐1】数列
的通项公式为
,对于任意自然数
,数列
都是递增数列,则实数
的取值范围为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937d04e6d1fb8a8c61a919dc44c954f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a874f3650d5a721d3738fc89d1d11a9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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填空题-单空题
|
较易
(0.85)
【推荐2】数列
满足
,
,且数列
满足从且只从第三项开始为递增数列,则实数
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d231cc49cfb1e99ad40231da1654b95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d5ec9ad92f37e64eccce922ab1b14e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
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