1 . 已知函数f(x)=lnx+a(x2﹣1).
(1)讨论函数f(x)的单调性;
(2)当a
,x∈[1,+∞)时,证明:f(x)≤(x﹣1)ex.
(1)讨论函数f(x)的单调性;
(2)当a
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6060fa8f42deab680b6e341efdbefd14.png)
您最近一年使用:0次
2020-03-16更新
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298次组卷
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3卷引用:贵州省部分重点中学2019届高三上学期高考教学质量评测卷(四)(期末)数学(理)试题
2 . 已知函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3e3bcd67cf1a355986c6e3132470c7.png)
(1)讨论
的单调性;
(2)求证:当
时,对于任意
,都有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/974167ff0590dbf16af689f79c5000c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3e3bcd67cf1a355986c6e3132470c7.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b60302d80d8613675bb3dd5c03164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d3941da6b4ecd78b5abea1ac3c53d5c.png)
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解题方法
3 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec6a16fd313882d304b86ee48217d4e.png)
(1)
在点
处的切线方程为
,求
和
的值;
(2)对任意的
,
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec6a16fd313882d304b86ee48217d4e.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d29c5c266a6d834a244c1f50c8f9848c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682dcc172381f8d3f36e5c0c24e140be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
4 . 给出以下四个结论:
(1)函数
的对称中心是
;
(2)若关于
的方程
在
没有实数根,则
的取值范围是
;
(3)已知点
与点
在直线
两侧,则
;
(4)若将函数
的图象向右平移
个单位后变为偶函数,则
的最小值是
;
其中正确的结论是:_____________________ (把所有正确命题的序号填上).
(1)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8652e6d0789db7aee593ce844cda1f00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b334e2eaa7e8fb79cef8208b56ee4f5.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77d7abb827b33a50040b4cd853660846.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047056c99b39c70fa40d3c8178e5b631.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c972cbd63decec197aec1bdc306de67.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bec550c01b4f075f22ab67f5e55ed5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451fc6e4248b63e70595f23842f06c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/962b58f6e56b0bdd3d356b016a16760b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/889abc765b78261550b887e9b46fd7e4.png)
(4)若将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7e949695da125bf4e0de0d96049d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4145ac17697bc0f91225af690eeeff0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdaf49f9611922348aa2784465da614.png)
其中正确的结论是:
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名校
解题方法
5 . 已知函数
,
是
的一个极值点
(1)求实数
的值,并证明:当
时,
恒成立;
(2)若函数
,试讨论函数
的零点个数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4afacfab7c1c309a03dfdbd7c2b1b8a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d9f35f2742252496c6a38f45ed7baf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c388166862b3ccfcc7ca749ebe5949.png)
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解题方法
6 . 已知函数
.
(1)若函数
在
处的极值为
,求
,
的值;
(2)若
,
对
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/469baf703aa0d2759e3df97be9524dea.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6616da8f7c03dc5d8f1ed993d3cfa25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc4136bd17997e11a7f8abcb19f9018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
7 . 已知函数
.
(1)当
时,求
的单调区间;
(2)若
,函数
在
处取得最小值,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65dbaaaa4ad3c82c9d8e765b0678615e.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a525e811ffc32387348f431b04c32225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce655a13dea9309f8ed84036ba293aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8bdb49d4cb59b0f4185dd8eb821194.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abb76da45ffa52b47c3a6b9a03ac7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93af12650c4b2e7299b84aa514360d74.png)
您最近一年使用:0次
名校
8 . 已知函数
(
).
(1)讨论
的单调性;
(2)若对
,
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38572ad4ef879663d599510d64c4020f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc2ccaad45af8bfcfcedfeb7149ed5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4967a06f85c0b16f817a003cabb8eec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2020-02-12更新
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1003次组卷
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4卷引用:2020届江西省九江市高三第一次模拟数学理科试题
9 . 已知函数
.
(1)讨论
的单调性;
(2)若
在
上只有一个零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3dce6be692288abd965c44a6a7debf8.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/75c3204dcb6b697db534514558111f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2020-02-09更新
|
1194次组卷
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6卷引用:2020届贵州省贵阳市高三11月联合考试数学(文)试题
10 . 已知函数
的定义域与值域均为
,且
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d1795f141619c7c4ebf1c6a6c6eb53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-02-09更新
|
523次组卷
|
3卷引用:2020届贵州省贵阳市高三11月联合考试数学(文)试题