已知函数
.
(1)设函数
,若曲线
在点
处的切线方程为
,求
的值;
(2)是否存在实数
,使得
对
恒成立?若存在,求
的取值范围;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81344623eb224cd50013c7ba7844bfa8.png)
(1)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4f764b0d11755922ef4f6c55297248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80cf0f8829ad6ed064ba129545b2d3a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/109c14e7a0c4dce57fd2b86eba638692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa8748f9bf0e49e067f65b9ce54c4718.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b60302d80d8613675bb3dd5c03164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2018-02-18 07:10:14
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解题方法
【推荐1】已知函数
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【推荐2】已知函数
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(1)若
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(2)若
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(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd9cdea1e995c59e5d3225acad8b4d3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43920f5171ed31db2520ef00e4c5fc24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57989e3d802251b0b60a7ec3d1794854.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae2a8be5702ed3726214ccab5c092505.png)
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【推荐1】已知函数
,
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(1)当m=1时,求函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73256f38ce8f09fb028cd65a3b0f3b90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b194133b32a8bdde31f16220079fa804.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a05fcb074e01fa0ed65af8ed755dc8ac.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99f214319ee4dcd5f68398e4350dcd22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b194133b32a8bdde31f16220079fa804.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89ba478bf90e81fc2c825ed83caff44f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ab7024f73ff0cb7e6a48197538a91e.png)
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【推荐2】设函数
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【推荐3】函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90918b116ddc7dd7115ece5520dbd006.png)
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