已知函数
,
R.
(1)证明:当
时,函数
是减函数;
(2)根据
的不同取值,讨论函数
的奇偶性,并说明理由;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5391593b13457454298c5ee523b40121.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e44c45ef0334070fc149b452dee26ae5.png)
(1)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)根据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
更新时间:2019-06-26 11:36:25
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相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】定义在
上的函数
满足下面三个条件:
①对任意正数a,b,都有
;
②当x>1时,
<0;
③
=-1
(1)求
和
的值;
(2)试用单调性定义证明:函数
在
上是减函数;
(3)求满足
的t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
①对任意正数a,b,都有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/367047822012754670d5797a73882eab.png)
②当x>1时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d55ef0d1b7ea88d92fd6e1ecebb5f5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce6155e181e21ce56ea658b70f8af17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8fc5cec42e2884e91c299c480739334.png)
(2)试用单调性定义证明:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
(3)求满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c447be661698cd419a2e01b076bed0f.png)
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【推荐2】已知定义域为R的函数
是奇函数.
(1)求a,b的值;
(2)若对在意的
,不等式
恒成立,求k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31b26dcc96e066238dfa3260b08155e.png)
(1)求a,b的值;
(2)若对在意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3628b1e5451765a91b3a29c7c275f47d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4a51ed8ea754492b2070473d9f53b5.png)
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解题方法
【推荐1】已知函数
.
(1)求函数
的定义域;
(2)判断函数
的奇偶性;
(3)若对任意
,
,
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193958420660811323b54638118197fa.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若对任意
![](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/ac4a7f3c53756a623410df0c4ee17897.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】已知定义域为
的函数
为奇函数.
(1)求
的值;
(2)
,
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fe37437003b658eeb284e0dd92c7a4.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ea7936ad4048b3fc87a81d5469ec33e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c147912d6afbf3ec3d1576198bb2bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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【推荐3】(1)判断函数
的奇偶性并说明理由;
(2)证明:函数
在
上严格增.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad6188d02c911dfdd3ca620e9d44ba5.png)
(2)证明:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4f831709102b325c2659597654715d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2372f424431ce7b547a66b7d61d75421.png)
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