已知函数
,
,若存在
,使得
.则实数
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f156c2df7cc18574bf870d38581d9328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2294f249b842c7ed86cbc123df2863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08290af79305df59bc0a1fc2b7c4f7c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11144bcfa2540dde9290046d49724ef1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
更新时间:2018-02-24 12:04:04
|
相似题推荐
填空题-单空题
|
适中
(0.65)
名校
【推荐1】已知正实数
、
满足
,则
的最小值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ceb0f84a2745d63f53eb614708f3ad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
【推荐2】已知数列
的前
项和为
,对任意
,
且
,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/1933b7c3ace69622339353431c519b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afb8aa768a6f76c0c94d9f83263f9b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0116da4c166cbc6efc7b80ce3b8c1679.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)
名校
【推荐1】函数
的最小值为
,则实数
的取值范围是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00f15ad6e4c0db06c84116e77e103e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
解题方法
【推荐2】已知函数
,
,若对任意的实数
,均有
,则实数
的取值范围是__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/303f8b294ab4cfda26d50f47cb3699b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40ccb0a72723bc4eed69d8998f9944ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032e8dc00cdc96860c9cbf8ac09677fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次