函数
的极小值为-8,其导函数的图象过点
,如图所示:
![](https://img.xkw.com/dksih/QBM/2016/5/30/1572654580285440/1572654586527744/STEM/16ffc26353c94af4b8d754a7645af743.png)
(1)求
的解析式;
(2)若对
都有
恒成立,求实数的
取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0cc328c48d828032bd4a38192d3edb0.png)
![](https://img.xkw.com/dksih/QBM/2016/5/30/1572654580285440/1572654586527744/STEM/b50d65c8236841f89bf6b9aab098566a.png)
![](https://img.xkw.com/dksih/QBM/2016/5/30/1572654580285440/1572654586527744/STEM/16ffc26353c94af4b8d754a7645af743.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)若对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7203cdb1dc9739579318e64df2732f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c169a47dc69e8603a83e1e83b757dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2016-12-04 07:56:51
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(2)设函数
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(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/610a635570c8e84423dbf0f6a566c138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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(II)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6ec4d3a3b7437fd15bdf2019adb0a65.png)
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