1 . 已知曲线
的一条切线为直线
,则
的最小值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/782f3f5352448210d2a7aa65daa3aacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e8c3d4b3d327a6343695dabe46af367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019d4ad2e3fb4a7abb66e0e9e55b556.png)
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2 . 命题
:函数
在
上是增函数.命题
:直线
在
轴上的截距小于0. 若
为假命题,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc43eaefeaa6ad55d23da40913aced7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0b5e402f725a71c3305bf3e72f72ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f79af8705af8a97bc8b02181377c658c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-02-27更新
|
144次组卷
|
2卷引用:江西省临川第一中学2019-2020学年度高二上学期第一次月考数学理科试卷
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3 . 给定两个命题,
:对任意实数
都有
恒成立;
:方程
表示焦点在
轴上的椭圆.如果
为真命题,则实数
的取值范围是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5abdea09520a9022a2f1e07bf12afe6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08c0e91b926aa053bafeddccdd1dd90e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1615a7f1e90ff4f2e21e9425b49183dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
4 . 已知函数
若
,且
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c1b41f769e1a0db88b95c537445172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3c473fbeaa310ffce19a579946556c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f94345694d4215284c41f87146795ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba317690c72a1d29babd8c6d303b0eaa.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 如图,在四面体
中,平面
平面
,
与
均为等腰直角三角形,且
,
,点
在线段
(不含端点)上运动.若线段
(不含端点)上存在点
,使异面直线
与
所成的角为
,则线段
的长度的取值范围是
![](https://img.xkw.com/dksih/QBM/2019/2/9/2137124509040640/2137551227035648/STEM/62f93f8d7d5642d9866f41d884e0746c.png?resizew=126)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/228a8e89aa8e53c569bdd03d2fe61b6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df6d51738ac1bc8b9530ea4a55745c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7526fe3d1eaa0474866fe4466594b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://img.xkw.com/dksih/QBM/2019/2/9/2137124509040640/2137551227035648/STEM/62f93f8d7d5642d9866f41d884e0746c.png?resizew=126)
A.![]() | B.![]() | C.![]() | D.![]() |
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2017-03-07更新
|
990次组卷
|
5卷引用:江西省临川第一中学2018-2019学年高二上学期期末考试数学(理)试题
14-15高二上·河南焦作·阶段练习
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6 . 已知映射
,其中
,对应法则
若对实数
,在集合A中不存在原象,则k的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13af609a53c2ce4fcbd681401709cc2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f3be879e2b7453bba2e64acc828583d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c02700da874e0a086697d31688fab5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71dc99f313f4a0dfd21a3ab6ef162f4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2016-12-03更新
|
563次组卷
|
3卷引用:江西省临川第一中学2018-2019学年高二下学期期末数学(文)试题
江西省临川第一中学2018-2019学年高二下学期期末数学(文)试题(已下线)2013-2014学年河南省武陟县一中东区高二12月月考理科数学试卷2016-2017学年江西新余四中高一上段考一数学试卷
11-12高二上·江西抚州·期末
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7 . 对一切实数
,当
时,二次函数
的值恒为非负数,则
最大值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6be67cbce81d7e50115e040bcd3dba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1bd0587f5d6a3b5db9e4a93e0dbc0ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/120f9c992d7a40af0fdeece3bf70bf40.png)
A.![]() | B.![]() | C.2 | D.![]() |
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