名校
解题方法
1 . 已知函数
(
是自然对数的底数),
.
(1)若
,求
的极值;
(2)对任意
都有
成立,求实数
的取值范围.
(3)对任意
证明:
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331d70266454df40256268b19b055a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2beb22b735da7cb8054dd722450632f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf42173c44d1da998520c2c8613b422.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f3c2be7482719651bcf491949681e05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c388166862b3ccfcc7ca749ebe5949.png)
(2)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a6568f780ebca9f00f5f8b1a90eb633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b66a0a8019c3ffc4e77731118cc98f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a6568f780ebca9f00f5f8b1a90eb633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0454b49c4a7006a49a43ceec249bbd68.png)
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2 . 设函数
,其中
为自然对数的底数,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75beac05ff31987303d0994a3a088162.png)
(1)当
时,讨论函数
的单调性;
(2)若曲线
在
处的切线与
轴平行,证明:对于任意的
,
都有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdf73fbb697d5304215d4b098082a8ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75beac05ff31987303d0994a3a088162.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a49684ba67f71171321586f1a77ad4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d01b783b94032c6075b6216f4b004422.png)
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解题方法
3 . 若不等式
恒成立,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dda708adaf49dd968ac4b39d8786a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
4 . 已知函数
,
.
(1)讨论
的单调性;
(2)若
有两个极值点
、
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213611317e843998c672932588cafe21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.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/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd888afdcfdb3e91a157d50f65e915e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87900d218ec656ce1bcff1b8ab4e1b3.png)
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2020-06-16更新
|
1184次组卷
|
7卷引用:辽宁省开原市第二高级中学2020-2021学年高三第三次模拟考试数学试题
5 . 已知函数
.
(Ⅰ)讨论
的单调性;
(Ⅱ)若
,不等式
恒成立,求整数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3d1cface33f3cae89bdefb327b23bf.png)
(Ⅰ)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d752d8db8a05b3ec7312f6ac8b64a07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2020-06-16更新
|
492次组卷
|
3卷引用:辽宁省大连市2020届高三第二次模拟考试数学文科试题
6 . 设函数
.
(1)当
时,求曲线
在点
处的切线方程;
(2)若
,证明:在区间
内,
存在唯一的极小值点
,且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c35c7e4144f417a28adea4d80fb45bc.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b7393fc425948d4261bb6c7d67f88e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c43f0abd5ca6f475282fc29ebcefce5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f436566ce8c86fda35b85bd3c26683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a8d6dcc96c6392f45a42fb413984e2.png)
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7 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ded03f2a1c79d7b1c0ac49e5b2ffd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c235ca725ade5c8b07943ac106a90fb3.png)
(1)若曲线
在点
处的切线l过点
,求实数
的值;
(2)若函数
有两个零点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ded03f2a1c79d7b1c0ac49e5b2ffd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c235ca725ade5c8b07943ac106a90fb3.png)
(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f952241ba679cdc6995a609ef35dabe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2020-06-15更新
|
487次组卷
|
2卷引用:东北三省三校2020届高三下学期第四次模拟考试数学(理)试题
名校
解题方法
8 . 已知函数f(x)=x2﹣x+alnx(a<0),且f(x)的最小值为0.
(1)求实数a的值;
(2)若直线y=b与函数f(x)图象交于A,B两点,A(x1,f(x1)),B(x2,f(x2)),且x1<x2,A,B两点的中点M的横坐标为x0,证明:x0>1.
(1)求实数a的值;
(2)若直线y=b与函数f(x)图象交于A,B两点,A(x1,f(x1)),B(x2,f(x2)),且x1<x2,A,B两点的中点M的横坐标为x0,证明:x0>1.
您最近一年使用:0次
2020-06-12更新
|
307次组卷
|
2卷引用:辽宁省锦州市2019-2020学年高二(下)期末数学试题
名校
9 . 已知函数
,若任意给定的
,总存在两个不同的
,使得
成立,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a24d1f2cc2cd2cd479b633e139cddce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc3cfaa8a3b5e5fc2a6d885a878ed469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7f71a521c8b8f9cea36dd7b32ba18a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30a2e8305b254380de1e9de7d5a6379a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
10 . 已知函数
(
,
),
.
(1)若
,求
的极值;
(2)若对任意的
,
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d417efa66d5781a2494808f8a3ff11d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5708e0190fdb73a493d6301d18d2b454.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43920f5171ed31db2520ef00e4c5fc24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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