已知函数
.
(Ⅰ)讨论函数
的单调性;
(Ⅱ)若
有两个极值点
,且
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aaf29ae62500dbbf3051b9d5e39aaab.png)
(Ⅰ)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0244821c4e431ab581a230e3c1903a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/510402367a75e7f85192312903603228.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
21-22高三上·全国·阶段练习 查看更多[3]
(已下线)超级全能生”2021届高三全国卷地区1月联考丙卷(B) 数学(理)试题(已下线)专题4.7—导数大题(讨论单调性)-2022届高三数学一轮复习精讲精练重庆市第二十九中2020-2021学年高二下学期期中数学试题
更新时间:2021-03-22 15:16:25
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解题方法
【推荐1】已知函数
在其定义域内有两个不同的极值点.
(1)求
的取值范围;
(2)记两个极值点为
,且
,已知
,若不等式
恒成立,求
的取值范围.
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572623295946752/1572623301861376/STEM/393e3e5e5a784af0b83403674933a638.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572623295946752/1572623301861376/STEM/274ed1150a114956973e90a674d9cceb.png)
(2)记两个极值点为
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572623295946752/1572623301861376/STEM/39a67707666e411c99f1fae7e36e6cc0.png)
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572623295946752/1572623301861376/STEM/37ce411c1300481b8bbf38a62729c31c.png)
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572623295946752/1572623301861376/STEM/934f4ee7b43f4107abe7b8b2bea96951.png)
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572623295946752/1572623301861376/STEM/57fa7d5914e74d18821ab8d84d93d448.png)
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572623295946752/1572623301861376/STEM/027a9564928a4d9cac66650a0db63246.png)
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【推荐2】已知函数
.
(1)讨论函数
的单调性;
(2)若不等式
对
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6800f29270ac6c492887f7060f7f745.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619efb05b33ac78b2af3df6332badf77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b72121844b80009dd0d192cb08cc0aa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
解题方法
【推荐1】已知函数
,
.
(1)求
的单调区间;
(2)若
,证明:
;
(3)对于任意正整数
,
,求
的最小正整数值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8deff064e208d0765b5ce6d4b92cc62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e72f6b2ef3329828cb8fc873eeba7c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271875c530a3603daed17d15076d2ec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94ac8929dd2b9b57f761aa44a1b60614.png)
(3)对于任意正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b46c4826f8aa0b0d459f3fa97c7daf7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐2】已知函数
(其中
是实数).
(1)求
的单调区间;
(2)若设
,且
有两个极值点
,
(
),求
的取值范围.(其中
为自然对数的底数,
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d797a2db981447da3e604690da4afca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/953346212071afcd33bef35fc84fa3d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4b7b5e5fcc4423cfe83e3d2297b258d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
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【推荐3】设函数
.
(Ⅰ)求函数
的单调区间;
(Ⅱ)当
时,
对任意
恒成立,求整数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833dee8cf3fe7f7fd783a2bf5a66d805.png)
(Ⅰ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/005bfe54c7323a0d105e746820e23fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20251bc82067179f013288b5c338856.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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