名校
1 . 若不等式
在
上恒成立,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bb3ce0108b6f7087e86e225e2fc0208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b029e85e686623cdef977b2cb1f207a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-07-07更新
|
284次组卷
|
4卷引用:辽宁省锦州市黑山县黑山中学2020届高三6月模拟考试数学(文)试题
解题方法
2 . 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
3 . 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
解题方法
4 . 已知函数
,定义域为
,且对
,
,当
时都有
恒成立,则实数
的取值范围为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0fa4137b76d72ae83f9358c4b2aa74a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c1756b564bf1d998d8179637011c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673207f6b77b8192d25463d071737b7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4583b929691724ab0f2cf403a5aeda92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18be7e0edc27bdec31b0c73586dd6764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-06-03更新
|
639次组卷
|
3卷引用:2020届辽宁省辽南协作校高三第二次模拟考试数学文科试题
解题方法
5 . 若对任意实数
,
恒成立,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17260a6fd0a67fd669414cf8d5dbea55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86e696122c144b16d88c9b8ee6b7239c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
A.![]() | B.0 | C.![]() | D.![]() |
您最近一年使用:0次
名校
6 . 已知函数
,则函数
的零点个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8157282f7d0b46544affc802611a9049.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31211787d2f52f50cd349a0f998fe8a9.png)
A.3 | B.1或3 |
C.3或4或5 | D.1或3或5 |
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2020-05-19更新
|
591次组卷
|
2卷引用:2020届辽宁省辽阳市高三二模考试数学(理)试题
解题方法
7 . 关于
的方程
有四个不同的实数根,且
,则
的取值范围( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/749f75f7df1b3c235a0d54861f542096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3604274ad6707a906eba371a9e884144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/978208a272034ca3c891c2c27759a2c7.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
名校
8 . 已知函数
,若
,使得
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f28628d732ee98d106b28236340ba9dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ed92e4a95b82636515c048c92f0de16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374054f44b9a52668f91ac7601e63c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2020-05-05更新
|
408次组卷
|
2卷引用:2020届辽宁省锦州市渤大附中、育明高中高三下学期开学摸底考试数学(理)试题
名校
9 . 设函数
在
上存在导函数
,对于任意的实数
,都有
,当
时,
,若
,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33770cd4511e0f50f2d959ffd913e97f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e43412ebdb334abf7d03bd45bff6a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/842c2ef9893cc67e621e272fa0be9926.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/737e4cc15c6072e0632d965bf89a8554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b20a1bded804308dfa3466df56d55df1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-04-29更新
|
750次组卷
|
2卷引用:辽宁省沈阳市四校2023届高三1月联合质检数学试题
名校
解题方法
10 . 已知
为奇函数,
为偶函数,且
,不等式
对
恒成立,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca577382853288997ae37b25c6b55fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d9c698de1e15e1d02a4febe2b10331a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-04-17更新
|
765次组卷
|
3卷引用:辽宁省盘锦市辽河油田第一高级中学高二下学期期末数学试题