已知函数f(x)=λlnx-e-x(λ∈R).
(1)若函数f(x)是单调函数,求λ的取值范围;
(2)求证:当0<x1<x2时,
>1-
.
(1)若函数f(x)是单调函数,求λ的取值范围;
(2)求证:当0<x1<x2时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51a56dfb57a9cce9ce98273078260a9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8dc531505ec45b8eb8ae4fad88d69e8.png)
2020高三·全国·专题练习 查看更多[1]
(已下线)专题3.4 高考解答题热点题型(一)利用导数证明不等式-2021年高考数学(理)一轮复习-题型全归纳与高效训练突破
更新时间:2020-08-21 10:26:26
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解答题-证明题
|
较难
(0.4)
解题方法
【推荐1】已知
.
(1)若函数
是实数集R上的严格增函数,求实数m的取值范围;
(2)已知数列
是等差数列(公差
),
.是否存在数列
使得数列
是等差数列?若存在,请写出一个满足条件的数列
,并证明此时的数列
是等差数列;若不存在,请说明理由;
(3)若
,是否存在直线
满足:①对任意的
都有
成立,
②存在
使得
?若存在,请求出满足条件的直线方程;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c52e4587ddbeddc3bb443f590813e6e2.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(2)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d245a7d77597f382b75e5684bceb37b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812be9806122241c476ba1db516c4823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1657882554d969098a5915fe0deb7980.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d245a7d77597f382b75e5684bceb37b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aaeac7854ffc2cea2668b4493ee4e77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d245a7d77597f382b75e5684bceb37b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aaeac7854ffc2cea2668b4493ee4e77.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/042e5050045868a536e18cbc69835a01.png)
②存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88274cb376ac853fb480a398d7f98974.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ef36be78ff3a90c652c94ef66477f5.png)
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解答题-问答题
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较难
(0.4)
名校
解题方法
【推荐2】已知二次函数
.
(1)若
的解集为
,求
的值;
(2)若
,且函数
的值域为
,求
的最小值;
(3)若
,且函数
在区间
上单调递增,求正实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851b5325755873953d8c74c774ab0cfa.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd2490213537a3f5f1104c3aa6053e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1810555c0c28fe352841322b85bbc6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9db11ab399d3b8b89220407dab198f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e25c9f94388835564b7e847f2a8a555d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a10213429ed1a8e2cb4779f4c51a63.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed13f8d600643beba6e0b7819ee09ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b081b1439dd4a3f6dafec805b6785700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74faf7b3ff695007936a44e7490afe55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-证明题
|
较难
(0.4)
解题方法
【推荐1】已知函数
.
(1)试判断函数
在
上单调性并证明你的结论;
(2)若
对于
恒成立,求正整数
的最大值;
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1415c90fda5b113d32651ecac1d5fb55.png)
(1)试判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99f68c6ed09e483db6edf0b4caf5e252.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea345ec447ec62daad6b5b652c417152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e81b4aac721bcd4a49593b48a28a8f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ebd674cc3ffdb0909653916d392aa7.png)
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较难
(0.4)
名校
解题方法
【推荐2】已知函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)若
,求
的单调区间;
(2)若
,
是方程
的两个实数根,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881b5840d507bfdeb88dd2dbcab5b4c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e0d4bea8bf53f7f290f61b6e53db002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ca13a93b5f401c0d39ba52b0cffcb0.png)
您最近一年使用:0次