解答题-证明题 较难0.4 引用2 组卷340
已知函数
.
(1)若曲线
在
处的切线为
,求
的值;
(2)设![](https://img.xkw.com/dksih/QBM/2015/1/12/1571959319609344/1571959325589504/STEM/3d3eea81768840109f218466174f7983.png)
,
,证明:当
时,
的图象始终在
的图象的下方;
(3)当
时,设
,(
为自然对数的底数),
表示
导函数,求证:对于曲线
上的不同两点
,
,
,存在唯一的![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.svg)
,使直线
的斜率等于
.
![](https://img.xkw.com/dksih/QBM/2015/1/12/1571959319609344/1571959325589504/STEM/1b4c32a0cfb14de8bc6a26a54311fedd.png)
(1)若曲线
(2)设
![](https://img.xkw.com/dksih/QBM/2015/1/12/1571959319609344/1571959325589504/STEM/3d3eea81768840109f218466174f7983.png)
![](https://img.xkw.com/dksih/QBM/2015/1/12/1571959319609344/1571959325589504/STEM/136995a0dea24df88860330a01092f62.png)
![](https://img.xkw.com/dksih/QBM/2015/1/12/1571959319609344/1571959325589504/STEM/9d2148a4da27426cbc7db6e777e7a69c.png)
![](https://img.xkw.com/dksih/QBM/2015/1/12/1571959319609344/1571959325589504/STEM/8df1a95edcd34a89b926fc168f2aa20d.png)
![](https://img.xkw.com/dksih/QBM/2015/1/12/1571959319609344/1571959325589504/STEM/df61580512c44e8691de8efbd7e5053c.png)
![](https://img.xkw.com/dksih/QBM/2015/1/12/1571959319609344/1571959325589504/STEM/fea3e068dd124c0ca98cbceba9b3347f.png)
(3)当
![](https://img.xkw.com/dksih/QBM/2015/1/12/1571959319609344/1571959325589504/STEM/d6b34f6dada044619914cecb62849103.png)
![](https://img.xkw.com/dksih/QBM/2015/1/12/1571959319609344/1571959325589504/STEM/76a965da5b87446a9308156fdaaf7d8b.png)
![](https://img.xkw.com/dksih/QBM/2015/1/12/1571959319609344/1571959325589504/STEM/3865acfd7def4e79b7d712d720b9c02c.png)
![](https://img.xkw.com/dksih/QBM/2015/1/12/1571959319609344/1571959325589504/STEM/52b6a1f9256449b882a840dfa9462d64.png)
![](https://img.xkw.com/dksih/QBM/2015/1/12/1571959319609344/1571959325589504/STEM/2ec2086f962d4e64be08cb307f6d031b.png)
![](https://img.xkw.com/dksih/QBM/2015/1/12/1571959319609344/1571959325589504/STEM/e89b836c01ae46a68c19ed11ecb9cf6e.png)
14-15高三上·贵州遵义·阶段练习
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