解题方法
1 . 已知函数
,其中
为实数,
为自然对数底数,
.
(1)已知函数
,
,求实数
取值的集合![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
(2)已知函数
有两个不同极值点
、
.
①求实数
的取值范围![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
②证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1203188d4eaea4984f479bd289a48a48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9003a22f3bfbdc2dba7869c0f7d54c8c.png)
(1)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6944b7c8a4a4f049389742729e6e854.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
①求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c013dd461282a9677073747d55f685.png)
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2023-02-14更新
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3卷引用:湖南省怀化市长沙市长郡中学等3校2023届高三上学期开学考试数学试题
2022高三·全国·专题练习
名校
2 . 已知函数
,其中
,
为自然对数的底数.
(1)当
时,对
.
①证明:
;
②若
恒成立,求实数
的范围;
(2)若函数
在
上存在极值,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1604d09f3a06f97537ea339a87bffc28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7364911f4597bfe996da15bf929c7fe.png)
①证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f81ed7f6a4475e0fa682fa81ee747da3.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ad473fe3395dc1273eccbda9355f1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f00f2f6ab162f9333ec55db195d663b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
名校
3 . 设函数
,
,
.
(1)求函数
的单调区间和极值;
(2)若关于
的不等式
的解集中有且只有两个整数,求实数
的取值范围;
(3)方程
在的实根为
,令
,若存在
,使得
,证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427c0e1338814bb5431c3ab7e2d3b9d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8025bceccbc5be142baecfaacfb44626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c0769a5f9d25f1c93c4d37b0e0af9e2.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eeb41f0d781816876cc3264a0fc79b3.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633ef53a95a7cf276cb6c9021d4ffcbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76230e463a5ed01ea817c66d194807d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41332c99ca8b3c902f94759e1be10188.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c9459b828d91efd08ca3b18e5518c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47e2551c314c6ea951fca591bf87a6f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0c66a634157c181156a0ead54d9fc0.png)
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3卷引用:天津市滨海新区塘沽第一中学2022届高三下学期高考适应性测试数学试题
名校
4 . 已知函数
,
,其中
.
(1)讨论函数
的单调性,并求不等式
的解集;
(2)若
,证明:当
时,
;
(3)用
表示
,
中的最大值,设函数
,若
在
上恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8803570a0c1419daf71e8e8002c7f0a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f10208c3bcf8a14e5ec1868b74442813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6a8fa700e08120d48f64b0821054ee.png)
(3)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1bfb9487f824ff9fd2a1a281f8d62f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e14d82de4864f4cc2f74249ecf5cbffa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bdf04f070224d193aaa2d0b13b96d48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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9卷引用:专题4.19—导数大题(与三角函数相结合的问题1)-2022届高三数学一轮复习精讲精练
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