已知函数
,其中e为自然对数的底数.
(1)求函数
的最小值;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff0fe4b40dee8abf06149e729f378f20.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef65af6961c625dc9d919ae4d13726e.png)
21-22高二下·河南·期中 查看更多[3]
河南名校联盟2021-2022学年高二下学期期中考试理科数学试题(已下线)专题08 证明不等式-2021-2022学年高二数学下学期期末必考题型归纳及过关测试(人教A版2019)辽宁省沈阳市第三十六中学2022-2023学年高二下学期6月月考数学试题
更新时间:2022-05-10 16:20:22
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【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0455e23bde86e7e912f9aca84145d0.png)
.
(1)若函数
有两个极值点,求
的取值范围;
(2)若对
,函数
恒成立,求
的取值范围;
(3)证明:对
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0455e23bde86e7e912f9aca84145d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9cd3690e7aa3debb1ed054a9f622da.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f832d9cca2d5c9d76d38374e2a258d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)证明:对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72620c113a6fe83273803a9ac24baa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc8c9f6cbca5a13a20ffe4b0c42838e.png)
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【推荐2】悬链线的原理运用于悬索桥、架空电缆、双曲拱桥、拱坝等工程.通过适当建立坐标系,悬链线可为双曲余弦函数
的图象,类比三角函数的三种性质:①平方关系:①
,②和角公式:
,③导数:
定义双曲正弦函数
.
(1)直接写出
,
具有的类似①、②、③的三种性质(不需要证明);
(2)若当
时,
恒成立,求实数a的取值范围;
(3)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31bb273b5a350968453b96f948fcded4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af7ca3fcd9a43d520ed650b80ef2dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/089d529ef22e4f75f91a4657dedcaf37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc4d4c6c322c65c32e15cf2ad012560a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2cb91e9953f005f9d72f892466b8fd2.png)
(1)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b8f5a1a76374ad5712b4ecafb64b96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0379c458448d37a46ae0d25e65ab6258.png)
(2)若当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9957a339be7094158adb4b156a31d40.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e1e3e51b8ae3bebb72439b409ee6b96.png)
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【推荐3】设函数
.
(1)若
是函数
的极值点,1为函数
的一个零点,求函数
在
上的最小值.
(2)当
时,函数
与
轴在
内有两个不同的交点,求
的取值范围.(其中e是自然对数的底数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90e60f9365188790da5f4236ed51d924.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c8d82b0a97f17f6fbd0587cdfc984e1.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c8d82b0a97f17f6fbd0587cdfc984e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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【推荐1】已知函数
.
(1)若不等式
在
上恒成立,求实数a的取值范围;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f9c3403d1565f1e1ea345ab5ad003c4.png)
(1)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d6243e93c41978871cb23d8e66148d.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047955c31d210088ee26f8d82a8ed3c4.png)
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【推荐2】已知函数
,其中
为常数且
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(1)若曲线
与直线
相切,求
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(2)设
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01cff53bc0df7d02f0887fc50523f4e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
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(2)设
![](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/859458471c86ae39e0cc42d2d960d03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5120da38792c0c52a5f54cc7912e290f.png)
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【推荐1】已知函数
.
(1)当
时,求函数
的极值.
(2)若
有三个极值点
,且
,
①求实数
的取值范围;
②证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83a4f1991e482ad3725855f60af88972.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1310a7a80d1f8751a3f8cafe7f8c8b4.png)
①求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57514ce816c30fa1d75f5b7e901ae499.png)
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【推荐2】已知函数
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(1)讨论函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e711ad73e9a501b2eced5946d77a1af.png)
(1)讨论函数
![](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/dba77024a68f858c6f391e835b4f7ed0.png)
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