若
,且数列
为单调数列,则实数
的取值范围是__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856536d7655f19133c61a690ca88e0ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2023-03-01 14:30:35
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【知识点】 根据数列的单调性求参数
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填空题-单空题
|
适中
(0.65)
名校
解题方法
【推荐1】已知数列
的前
项和为
,对任意
,
且
恒成立,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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e077401074a7e4966bac92f1e1a21b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad848b693feb0cdf7f28f0117d3adc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
【推荐2】数列![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f531901ded4bba21703113acb9aa118d.png)
为单调递增数列,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f531901ded4bba21703113acb9aa118d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69d307ec71820b6536453fbdb5069da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次