已知递增数列
满足:
,
,且对于任意的正整数
,不等式
恒成立,则正数
的最大值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/606e55241a2e145d54849129b8ffd20f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a400b5443af7580aa8f0fb7499fe362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bae03ee4ac75dacfb026290e4207dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5093aa4984c7a9da583d3223c0dd051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
2018高二上·全国·专题练习 查看更多[3]
更新时间:2018-09-17 12:57:37
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相似题推荐
单选题
|
适中
(0.65)
【推荐1】若不等式(﹣1)na<2+
对任意n∈N*恒成立,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c933a13a7f552be35006bc78ee4cca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f636a6bb74051bb1339911964da370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c933a13a7f552be35006bc78ee4cca5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】已知数列
满足
,当且仅当
时,
取到最小值,则
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb21592e41fc18b33c25e41924427710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcca0e992d47f3db0be185ba861adf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.![]() | B.![]() | C.与![]() | D.以上均不对 |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐1】设实数
,在等差数列
中,
,
,
为数列
的前
项和,若满足
,且
对
恒成立,则实数
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e7507801c71834002632b164138eb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec69b4592d964db8836dae1fc5f75cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/412aa1b13a36662f08c0bf03b81236f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca2dbab809f76c97e979780e338d012.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037e61c72b3b77cbbed16e398f66a9da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/775a7fde3db37f55687dfcd266ee5150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐2】已知数列
的前n项和为
,若对任意的
,不等式
恒成立,则实数a的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/465ff33c03da5afb9f9c3bb3d0abe15f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd44b9d3a345ce57a651aab26bb36160.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次