(1)已知函数
为常数),求不等式
的解集;
(2)是否存在实数
,对任意的
恒成立,若存在求出实数
的取值范围,若不存在,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06f8e800edbedc3df132eeb6bcdb0f22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b261d0deb4e60b893246929a682eae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
更新时间:2021-11-15 22:16:33
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】定义:已知集合
,
,
,则称
为“有界恒正不等式”.
(1)当
时,判断
是否为“有界恒正不等式”;
(2)设
为“有界恒正不等式”,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b501f9ec9f4eccb95d7fc47103f6a1a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03d0f310fe9ce9d36f53050e33eada78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c7eb1186ebf0da40ade17af636591d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c7eb1186ebf0da40ade17af636591d9.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c7eb1186ebf0da40ade17af636591d9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c7eb1186ebf0da40ade17af636591d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知关于
的不等式
.
(1)该不等式的解集为
,求实数m的值;
(2)若该不等式的解集为集合
的子集,求实数m的取值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe1529a871731d370e1a271236453fe.png)
(1)该不等式的解集为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/230c9d1020ceb5a8511fa839df1b301b.png)
(2)若该不等式的解集为集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6cd195b9f38f44f2dd03900ec85ee4b.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】设函数
.
(1)若对于
,
恒成立,求
的取值范围;
(2)若对于
,
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b1b2e59640035a31390b2e73d42521.png)
(1)若对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b19ec2a677e3362a65dadaa5566cd27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b924fe63954fd9d7660214c4edd11ecb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1816cc01a4e07f6ecdced83e3ec7f2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b924fe63954fd9d7660214c4edd11ecb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】已知
.
(1)当
时,解不等式
;
(2)当
时,
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5498ef1737cffcfaefd0ae4559b7e1.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6009d51b897a4f898b57e483234f391a.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/599b100243599b6dc57c333a829c129f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13e66e00bb4931297b97b94010adc89a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次