已知函数
,不等式
的解集为
.
(1)求实数
的值;
(2)若关于
的不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d9cf418414a6d78280277b19c6c71a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d16ae2a8b095b75d7ee1d9a05f7b05c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c88b7907befa90aaf01557fb468349.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0e888899dbd0b717189ac91e34da10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2018-04-06 10:51:14
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解题方法
【推荐1】已知函数
.
(1)求不等式
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(2)若不等式
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f906981d59dfd6c3a9df3de053ed0ae1.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13684fef84089c00c45a535ddc79c8d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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适中
(0.65)
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【推荐2】已知
设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c79271a19471a8f4910b018074c0fc1.png)
(1)若
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(2)若函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fed98a219097783e0ca2f41483cac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c79271a19471a8f4910b018074c0fc1.png)
(1)若
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(2)若函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/079ed82c42ab357242a19f7ea758a137.png)
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(1)当
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(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0abe4960954bb3144b7e86d4233e747.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c9b7c32e9eed37f6f536823c17566b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf5cbc474c7c0d66b468a3a5f52fe99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐3】已知函数
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【推荐1】选修4-5:不等式选讲
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(1)若函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若命题“存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea847ac3dc234b7892744e0f3af2feb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5edf03b0dcaa8907ab3854dc72dd42.png)
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