1 . 已知函数
,
.
![](https://img.xkw.com/dksih/QBM/2022/2/21/2921392171024384/2926939060887552/STEM/b043e32e-ccc6-4436-b29d-f6d4ecb99a85.png?resizew=235)
(1)画出
的图象,若
与
的图象有三个交点,求实数
的取值范围;
(2)已知函数
的最大值为
,正实数
,
,
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99fc9c920cad0fd4fab2b56fb18a300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://img.xkw.com/dksih/QBM/2022/2/21/2921392171024384/2926939060887552/STEM/b043e32e-ccc6-4436-b29d-f6d4ecb99a85.png?resizew=235)
(1)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/408a9272589ff1809c137869ce8673a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f20421354eeae0a1b34ba40a57992402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbadbad21e77939800df4772b977103e.png)
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2022-03-01更新
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5卷引用:贵州省铜仁市2022届高三适应性考试数学(理)试题(—)
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