已知定义域为R的函数
是奇函数.
(1)求实数a的值;
(2)判断该函数在定义域R上的单调性(不要求写证明过程).
(3)若对任意的
,不等式
恒成立,求实数k的取值范围;
(4)设关于x的函数
有零点,求实数b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39027cd6cdc96e73da2e283826dc45c1.png)
(1)求实数a的值;
(2)判断该函数在定义域R上的单调性(不要求写证明过程).
(3)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/995ec593baa4ef50b6d87c78380953d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c147912d6afbf3ec3d1576198bb2bc.png)
(4)设关于x的函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59149993d40ff19e71bae887e6df444a.png)
更新时间:2020-02-23 16:54:52
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【推荐1】已知
是定义在
上的奇函数,且
.若对任意
,
都有
.
(1)证明:
在定义域
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(2)若
,求实数
的取值范围;
(3)若不等式
对所有
和
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d43eb5d13c51115c0ca3087bb0b50a9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47cba6f5e37c5d0861794fa5c7a22a1c.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d43eb5d13c51115c0ca3087bb0b50a9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac72965632a701ef961eff633ff06410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5df575d7d68085bef8491a30c1a72b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c4d001c51cf7b47102f641ded56b01b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f79c8048b437627dc13ab8c102539a4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐2】已知
是定义在
上的偶函数,当
时,
.
(1)当
时,求函数
的解析式;
(2)解关于
的不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37aa94fb49142178126bf4d6730af798.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)解关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/738fe88623f4d6225d9d48b55a1ee1f8.png)
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【推荐1】设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4191a30c29e46dea51f986c311c7bf0.png)
(1)若函数
是奇函数,求实数
的值
(2)判断函数
的单调性,并证明
(3)当
时,若不等式
恒成立,求实数
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4191a30c29e46dea51f986c311c7bf0.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66f0ca536621ec8db02707ba65917029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐2】已知函数
.
(1)当
时,求
的最大值;
(2)若函数
为偶函数,求
的值;
(3)设函数
,若对任意
,存在
,使得
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc8ff435cb171282d3176ec1ca543095.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd7bc66955c878516fa7e4c1900c85f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a83cf614a139f0c25f89a981d8205b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76403d7140eb0fb3942718a3f4532151.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cd44d4ec6f289a6e2fe73f39cb4fc6f.png)
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【推荐1】函数
的定义域为
,且满足对任意
,有
.
(1)判断
的奇偶性并证明你的结论;
(2)如果
,且当
时,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5259b38698a36da71ca43521fe18615e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc1bc250c8a6523a1be394ff48d4a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e9b0e8693d64d9a59287e4802c535a.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b7c08e2f109808831db0754c2f6c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐2】函数
.
(1)若
,证明:函数
在
上单调递增;
(2)在满足(1)的条件下,解不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d11a1e9222ca58eb7d58fadd5c790168.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cda591d3909af06eabf6b37c65bfe571.png)
(2)在满足(1)的条件下,解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec1435a06c07028c38c49e76d698225.png)
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