名校
1 . 已知函数
.
(1)若
在
处的切线方程为
,求实数
,
的值:
(2)求证:当
时,
在
上有两个极值点:
(3)设
,若
在
单调递减,求实数
的取值范围.(其中
为自然对数的底数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f51a43d6dd32a758e2d49f3ca3abe.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd4ec6c78bab05a5df3d9954a70846ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58153bf3fdc83363cb5a23a2740d3778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/301605e86e5a5e61a65c91cd3dd8b77e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe5853a3e36e55ccf04a974c6df2811.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac4bdfe0d1fbe72d6f7bb854ca59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/579e2c39e6c0a640357e3b0ccd6f954a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0608c244cb58f0962dc36678c945036.png)
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2020-06-24更新
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509次组卷
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4卷引用:宁夏吴忠市青铜峡第一中学2020-2021年高二下学期第二次月考数学(理)试题