已知函数
,
.
(1)讨论函数
的零点个数;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1541129800df1fdf57f5ae66c200ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6591317a3b0fafd69e497c46c9e271ea.png)
更新时间:2018-06-14 22:55:35
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解题方法
【推荐1】已知函数
,
.
(1)求过点
且与曲线
相切的直线方程;
(2)设
,其中
为非零实数,
有两个极值点
,且
,求
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(3)在(2)的条件下,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77227e2627be28f36ee74ee3e8b563c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c20ab8782f3ad46b8608d30df21aace8.png)
(1)求过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d836280b3e758c30cbd7e8a5b7fbf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f786a5701dc1a8a015e8843c3360151b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)在(2)的条件下,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9387c3b3079c432e3845c60466fe0921.png)
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【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea7339bea1bff0cb7f236f5891e30fad.png)
(1)当
时,求函数
在
处的切线方程;
(2)令
求函数
的极值.
(3)若
,正实数
满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea7339bea1bff0cb7f236f5891e30fad.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcc96b41d90ed97aa7dd11eb4cb4a336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22a4a0dd7307a1323d25331e60782d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8edc9a8dca8cf050887b4915bfc962f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6330de640d51bb3970813289a4de3a5d.png)
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解答题-问答题
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较难
(0.4)
【推荐1】已知函数
.
(1)求曲线
在点
处的切线方程;
(2)若函数
在
上只有一个零点,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42fe84ecdcafb66c2e3a4dd702503729.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9f8845aa2b51c460f2d798c9f62fa3.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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|
较难
(0.4)
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【推荐2】已知函数
.
(1)讨论
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,使得
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d0a674599ca8a25c402d6589409231.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86968b93b0430fa46c70586629658d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ca13a93b5f401c0d39ba52b0cffcb0.png)
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