已知函数
.
(1)求函数
的定义域;
(2)若方程
有两个不等实根,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1222661198090461d95c4d884f51bfc.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d3207530ec55d0cdcd1de7c0bceef58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2020-02-14 09:01:19
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解答题-问答题
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适中
(0.65)
【推荐1】已知函数
.
(1)设
,当
时,求函数
的定义域,判断并证明函数
的奇偶性;
(2)是否存在实数
,使函数
在
上单调递减,且最小值为1?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c27aa70003161314c176e59dc638e2.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4d19e4f6b9c88373596920e418daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bacbd8f85c7ed750646ecf8f5b11071.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】已知函数
,设命题
“
的定义城为
”;命题
“
的值域为
”.
(Ⅰ)若命题
为真,求实数
的取值范围;
(Ⅱ)若命题
为真命题,且
为假命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d14fdc2c12c54dce933f3273036cafe6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](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/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
(Ⅰ)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅱ)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】已知函数
.
(1)求
的单调区间;
(2)当
时,判断
和
的大小,并说明理由;
(3)求证:当
时,关于
的方程:
在区间
上总有两个不同的解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c599bf5af19e4603956e98c5650dbd4f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17988cb33273869bda17fa256f968230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4886e28e9ecd40f7edd25f25bde28453.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2709ca478fb15ea08e8aa55328eae8e6.png)
(3)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ccc2e60c40781eca527195c5a721169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a00be02f89bb28b54fadb4e0c27e13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae3777d65a4e4a642c6772a1870c8b9.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐3】已知函数
.
(1)判断函数
的奇偶性并给出证明;
(2)设
,若函数
有且只有一个零点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/243a6c2e6ce173802b36ce0ec26cd6fd.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75c7c7e907dd9fdb97da93bd91f9990e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次