已知
,
.
(1)求曲线
在点
处的切线方程;
(2)当
时,
为增函数,求实数
的取值范围;
(3)设函数
,
,若不等式
对
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b667db3e1a239e2dce88689898f9a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d3e0c1b288d8cc073a1c80d16722529.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80cf0f8829ad6ed064ba129545b2d3a2.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbb01a7f5e9861aa185c6c63fcd58c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f3c2be7482719651bcf491949681e05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5cb7393be6f4d96a31dbb56462644d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34a52b6ee0b6d5ca52280763369342e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d2458760f26f868ea1dadb5814594b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ff33c61648237bd4076d6a7168c9d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2017-04-23 15:52:26
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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