已知函数
.
(1)求函数
在
处的切线方程;
(2)若
在
上为单调函数,求实数
的取值范围;
(3)若在
上至少存在一个
,使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d2c0831e88d160be706b842725154b.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/150e8e4ca6aa729a72a6a17c36b8ebfe.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25da8eb5f60afc31df54b3c0858982b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6d804ef44bfc64f824b0ccef71765e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)若在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7754cc9374c8193dadb6875fb8a3fefb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47a6f7e5555caf6704f45ddd737d3488.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
更新时间:2016-12-03 09:47:10
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解答题-问答题
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【推荐1】已知函数
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(1)若
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(2)当
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(1)求函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9db7ad079bd6f081454886373f0e95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/961e8b659b056cb6bd331e14f12140ea.png)
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(2)讨论
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【推荐1】已知函数
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(2)令
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