已知函数
.
(1)当
时,求
在
处的切线方程;
(2)设函数
,
①若函数
有且仅有一个零点时,求
的值;
②在①的条件下,若
,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc381d773450f2aeeaa3aebe2c6c319.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaadd22cf8c6c5464b27e1f12b75c213.png)
①若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
②在①的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdf5f54ecf04461c5d9bf5e892fe5e40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc2a572edaa810398462297a5e900ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
2014·吉林·模拟预测 查看更多[4]
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更新时间:2016-12-03 06:52:23
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【推荐1】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
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【推荐1】已知函数
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【推荐2】已知函数f(x)=lnx-ax,a∈R.
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