1 . 下列命题中为真命题的是( )
A.“四边形![]() ![]() |
B.若![]() ![]() |
C.函数![]() ![]() |
D.在平面直角坐标系中,第一象限内的点构成的集合为![]() |
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2 . 下列命题是真命题的是( )
A.命题“若![]() ![]() ![]() ![]() ![]() ![]() |
B.若命题![]() ![]() |
C.“![]() ![]() ![]() |
D.若命题![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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2020-12-26更新
|
47次组卷
|
2卷引用:山西省长治市第二中学校2020-2021学年高二上学期第二次月考数学(理)试题
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3 . 命题“已知
,
,若
,则
”的逆否命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d285a4c557fc9748105b62ccd94b7859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fb20e291772c2614ad19f4cc919dfec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657435e1fda84118e7f63c97505c8b75.png)
A.已知![]() ![]() ![]() ![]() |
B.已知![]() ![]() ![]() ![]() |
C.已知![]() ![]() ![]() ![]() ![]() |
D.已知![]() ![]() ![]() ![]() ![]() |
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4 . 给出下列四个命题:①已知
,
表示两条不同的直线,
,
表示不同的平面,并且
,则“
”是“
”的必要不充分条件;
②“
”是“
成等差数列”的充要条件;
③命题“在
中,
,则
”的逆否命题为真命题;
④“若
,则
且
”的逆否命题为真命题.其中正确的个数是( )
![](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/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a54425f5c5f9234f869ae6aa53c5d551.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a93a52c2b943e4c70ace99ed802d2b5.png)
②“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60f318dae61e291e3c28eff545f44787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
③命题“在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
④“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34715101c66fa12ce6baf0a9c53f1672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a7df955fc17e92fd86302f8c34664a.png)
A.1 | B.2 | C.3 | D.4 |
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5 . 已知命题
:
和
是方程
的两个实根,不等式
对任意实数
恒成立;命题
:已知
,
,若对
,
,使得
.
(1)若命题
为真命题,求实数
的取值范围;
(2)若命题
,
至少有一个是真命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d144a4ca8ec356757e36400e08b6452a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ef90ed96472025b70046ff6220774f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c395021157c73ac8dcde32864f7e121.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ad2cb2931e58d5cd7d27b8b40af9ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcc46f127abe98c1f8b51a9110cb03a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d93f4c9a58325668a7a97ac88bc813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a5e384459cc4eb712b503bd181b535.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6154e00013d9dee84c0e941f676ea9.png)
(1)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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6 . 已知命题
:对任意实数
都有
恒成立;命题
:关于
的方程
有实数根.
(1)若命题
为假命题,求实数
的取值范围;
(2)如果“
”为真命题,且“
”为假命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.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/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed96a4869723b318e458de59d80342e8.png)
(1)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)如果“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2020-12-01更新
|
298次组卷
|
2卷引用:山西省长治市第二中学校2020-2021学年高二上学期期中数学(文)试题
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7 . 设
,命题
,命题
,则
是
的______ 条件.(填“充要”“充分不必要”“必要不充分”“既不充分又不必要”)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/941179bc24691c350c2ab8ab4f5a0230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d9dff5aa0aeb0eaf464803473812ed9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e26b38e357c7d985656ba7bb3c794a5.png)
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2020-12-01更新
|
334次组卷
|
2卷引用:山西省长治市第二中学校2020-2021学年高二上学期期中数学(理)试题
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8 . 下列命题中的假命题是( )
A.质数都是奇数 | B.函数![]() |
C.112能被7整除 | D.奇函数的图像关于坐标原点对称 |
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9 . “若
,则
”的逆否命题是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9633a0d9643b3ec9d9249fb7fea1c990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/117e314c49dad391fa72a658418fd9ac.png)
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10 . 命题“若
,则
”的逆否命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0aa2ef928b6e3341d0a0dc6d8055b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() |
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