1 . 选修4-5:不等式选讲
已知函数
.
(1)在图的坐标系中画出
的图象;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/a7f9bc58-6fbd-437e-b1a3-9a03ef45001a.png?resizew=221)
(2)若
的最小值为
,当正数
,
满足
时,求
的最小值.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9527ed65d2740d81ea949515c7ebd954.png)
(1)在图的坐标系中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/a7f9bc58-6fbd-437e-b1a3-9a03ef45001a.png?resizew=221)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df8acc7885b7af2fccf3fb1056066203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/219ba6c8a1b54598db1a78cab28d9d30.png)
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2 .
.
(1)画出
的图象,并由图象写出
的解集;
(2)若存在
使不等式
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ddb40387050651b27ddef665ed2f079.png)
(1)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
(2)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/487b0c5050c2aeb8e01ad735db5789f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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