已知函数
.
(1)若
,求证:函数
有且仅有2个零点;
(2)若关于x的不等式
在
上恒成立,其中
是自然对数的底数,求实数m的取值范围.
参考数据:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f43a1fcaeb4a25ac37f7751427744c6.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/711b21672fd907c5c92fee1d649e7003.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1392fd6b0ee7cc4a48fdab46fb51a619.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd27b57c7dd68b9efc05e3d807015ea9.png)
10-11高二下·云南红河·阶段练习 查看更多[1]
(已下线)2010-2011年云南省红河州蒙自县文澜高中中学江高二3月月考数学理卷
更新时间:2016-11-30 17:09:17
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适中
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解题方法
【推荐1】已知函数
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(1)
在
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平行,求
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(2)不等式
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3a34d6f60032718820c3da2b07786b.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1312d640aa773779a34e9d50791ef5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
【推荐2】已知函数
,
.
(1)若曲线
在点
处的切线方程为y=0,求m的值;
(2)若对任意
,都有
,求m的取值范围;
(3)讨论
在区间
上的零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa8d15bb03aed735504072b540ffe86c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd9218a657b17654c5d757a6f7dee9a.png)
(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9f8845aa2b51c460f2d798c9f62fa3.png)
(2)若对任意
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
(3)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
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【推荐1】已知函数
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(Ⅰ)当
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在
处的切线方程;
(Ⅱ)求函数
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上的最小值;
(Ⅲ)若关于
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在区间
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d86efb35837fb2c502f9d4f2f549c48c.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(Ⅱ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cee1669d34fd83baf49b26615f24c57.png)
(Ⅲ)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed69dfb8429d42ad3e25fd1dd281def2.png)
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【推荐2】设
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(2)对于
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(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bec650b76fcd62342ca451d683258f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d93f4c9a58325668a7a97ac88bc813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/214d5b7e333f546dcf4c14dcf8462648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6154e00013d9dee84c0e941f676ea9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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适中
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(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
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(2)当
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