已知函数
.
(1)讨论函数
的单调性;
(2)若函数
有两个零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92a3c7dcdab30b4a37b4a14bcb9d71b6.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2019-05-24 08:52:18
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解答题-问答题
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解题方法
【推荐1】已知函数
.
(1)若曲线
在
处的切线的方程为
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的值;
(2)若函数
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987ac6a091c08c22d0c1988afb516ff4.png)
(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec25d99e167935341292c69465a4cc5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3229b5416d45ec449f2bd1983d29d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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(0.4)
名校
【推荐2】已知函数
(
),曲线
在点
处的切线与直线
垂直.
(1)试比较
与
的大小,并说明理由;
(2)若函数
有两个不同的零点
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5a76672ab542701face0a004ca1c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8a3365e99f926b1dafa901ab232152.png)
(1)试比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e310e5b7100597e72f68914c9d85a7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df9fc1d337f2e1974952cd5731cc4c44.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5b9f57d3634f8337f1414f8a2a2dc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0fd6297d9af0dbfaccd08a53054ec5.png)
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【推荐3】已知函数
有三个极值点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
.
(1)求实数
的取值范围;
(2)若
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的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13486c469290f268e9524cc42fccf02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c06ceee2b1e227de025476eee95672.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b74edbceb54dbb20a9055d2753780386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
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|
较难
(0.4)
名校
解题方法
【推荐1】已知函数
.
(1)求函数
的极值;
(2)若函数
的最小值为
为函数
的两个零点,证明:
;
(3)证明:对于任意
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2006853541ce77e743b11a91cb352a44.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f51ac693796740fae6742ff2a0e793ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1847254a526f76b141c86405dd402e84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/626357a0b2490460d44e9a9f02080783.png)
(3)证明:对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/413b0f38360084eaecb54a3f411e847f.png)
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【推荐2】已知函数
有两个极值点
,且
.
(1)求
的取值范围;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a294b62286b3c1f81d73f9d0da0bcba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a1e23283f24eeaf75d9b7b545f44327.png)
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