设函数
.
(1)求不等式
的解集;
(2)若
对任意
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/478c2fc9749c7c64dcb590dbda50d236.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaabd5374abfe989c9b8429118e61bf5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed3ce9ab4c660dcdd152716cdf5ebe0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
21-22高三上·全国·阶段练习 查看更多[2]
更新时间:2021-03-22 08:58:33
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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)当
时,求不等式
的解集;
(2)若
对于
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52fef4216fcb20f97c7dfb8a0009925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d3246251f3aedfca31e438337a3bb0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e72f6b2ef3329828cb8fc873eeba7c.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05fce924911d5ed93147dfce9e41c2b0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43920f5171ed31db2520ef00e4c5fc24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b92149b74482a4d378d9fdbca6a7dab.png)
(1)当
时,求不等式
的解集.
(2)若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b92149b74482a4d378d9fdbca6a7dab.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae9d2ae70aecc56dbd7b0db8b9b8203c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17301687840079dd0d8b1b5c8c2a1e84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61363f1f8fdc96c9ac4ae0314fcf1039.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
【推荐1】选修4-5:不等式选讲
已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99098b4c09686f6d1479be7b5455cf6e.png)
(1)若
的解集为
,求实数
的值;
(2)若
,若存在
,使得不等式
成立,求实数
的取值范围.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99098b4c09686f6d1479be7b5455cf6e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e2405c4822bceae1cf191edb502d3b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4642c1f1c6c213cf8087222eb760965.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/185d89ccdb3f00970886537141e90100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】已知函数
.
(1)当
时,求不等式
的解集;
(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/316b408c2d2242c8b78c6f76ccb6a900.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbc901cbdb68130ddac3174583dd93c.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ebab4c7345a254d1d47d4b4587d9317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次