名校
解题方法
1 . 已知函数
的定义域为
,其中
为实数.
(Ⅰ)求
的取值范围;
(Ⅱ)当
时,是否存在实数
满足对任意
,都存在
,使得
成立?若存在,求实数
的取值范围;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c22008acfa391c7b0f7f0cb593c65667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a3163cc2d37e7b7fe450f6e8bf8500.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1bf60c5e8996d138198fe74f30ce520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57a3de2dbd396b0b8d1929eb9b634d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2021-01-30更新
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1259次组卷
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5卷引用:四川省内江市威远县威远中学校2021-2022学年高一上学期期中数学试题
名校
2 . 已知
是定义在
上的奇函数,且
.若对任意的
,
都有
.
(1)用函数单调性的定义证明:
在定义域上为增函数;
(2)若
,求
的取值范围;
(3)若不等式
对所有的
和
都恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d188ec2580e273ce87e51653a2177ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87cd4403487962c38c8707ba3ab3fa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccf0333e955963760abff3f045f921e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4440dae5b564c68d767e66a7481d943.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22d476f14a11d6a5aae028fe1d4b52c7.png)
(1)用函数单调性的定义证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9cbd87b42f317b0b82db7c50e19ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5c93e8603be430538eb76d6337e75e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1591d4244dcf5539a4ae98f554e91e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec25b9d7ca47b780a744c2ebbf31d925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次