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1 . 命题“自然数
,
,
中恰有一个为偶数”的否定可以是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fdeba282b028321696be7f90f2cbfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3aa688caadfeb5bdf9c7dfecb5afa31.png)
A.自然数![]() ![]() ![]() | B.自然数![]() ![]() ![]() |
C.自然数![]() ![]() ![]() | D.自然数![]() ![]() ![]() |
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2 . 设
:
,
:
或
,
(1)求
对应的不等式;
(2)若
是
的必要不充分条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e434d52b7741e42c21c2785eb07ffcaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdad5f67e032735857d226f86dafab1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89bdf1717c68cfc8a306ee79757e7e21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe56e4c25f9c75c08e1f6008a193ffb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa5e2054bc2ac317c40472f3c020612.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbcb7d072ff8b92ccaff2c75d8e371f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e434d52b7741e42c21c2785eb07ffcaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbcb7d072ff8b92ccaff2c75d8e371f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab4717e4827480f0f6f4ded85e52eab.png)
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3 . 写出命题
:若
,则
且
的否定,并判断真假( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e434d52b7741e42c21c2785eb07ffcaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c7dad886ddc5c1debb2c840476fa002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1487e9e4bd2c25c594e655e95c44d574.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7c3c08e834ec4812de1ee5690c83af.png)
A.![]() ![]() ![]() ![]() |
B.![]() ![]() ![]() ![]() |
C.![]() ![]() ![]() ![]() |
D.![]() ![]() ![]() ![]() |
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2022-10-19更新
|
276次组卷
|
2卷引用:甘肃省庆阳第六中学2022-2023学年高一上学期第一次月考数学试题
解题方法
4 . 设命题
方程有两个不相等的实数根; 命题
对
,不等式
恒成立.
(1)若命题
为真命题,求实数
的取值范围;
(2)若命题
一真一假,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4fae4055c9c444dc577bafdd837ee8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e61df3149d183434e87eba1d909c499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eb7f7848f79e406cf0091dd78d26bed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b1e439e25f6755d975ef3d921921f3b.png)
(1)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e434d52b7741e42c21c2785eb07ffcaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab4717e4827480f0f6f4ded85e52eab.png)
(2)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbff1d44b43a4b383e04244a7520403b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab4717e4827480f0f6f4ded85e52eab.png)
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2022-10-19更新
|
211次组卷
|
2卷引用:四川省德阳市第三中学2022-2023学年高一上学期第一次月考数学试题
名校
5 . 请写出“
或
”的否定形式_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143b917df0520097be222accbddf9394.png)
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名校
解题方法
6 . 命题
,命题
.
(1)当
为真,且
为真,求实数
的取值范围;
(2)若
是
的充分不必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b799eec7396bf1fa333eb1c9fb8750aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75ab0bada650dde26de16f47b6b341a4.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a29a0f66cdd2bee3706dd35bc5acd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89bdf1717c68cfc8a306ee79757e7e21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ffb694021b52653de5141ae27ba6d0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1af1012edc102c3a0e5ebeee99175be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbcb7d072ff8b92ccaff2c75d8e371f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
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2022-10-09更新
|
244次组卷
|
2卷引用:湖北省十堰市郧阳中学2022-2023学年高一上学期10月考试数学试题
7 . 设命题
:实数
满足
,其中
,命题
:实数
满足
.
(1)若
,且
为真,求实数
的取值范围;
(2)若
是
的充分不必要条件,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/b1dc823077f5a0767f65ee2187834039.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3a34d6f60032718820c3da2b07786b.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/90e2f1a7cb753eafc3662bcc5a7005d9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
名校
8 . 已知命题p:任意
,
,命题q:存在
,
.
(1)若命题p与q有且只有一个是真命题,求实数a的取值范围.
(2)若命题p与q至少有一个是真命题,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a349161b52f9493112280309454cd9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47dbb694e96dbd7221ac9499ddeb5d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc8440d57dd0500b1c429561d9661a1.png)
(1)若命题p与q有且只有一个是真命题,求实数a的取值范围.
(2)若命题p与q至少有一个是真命题,求实数a的取值范围.
您最近一年使用:0次
解题方法
9 . 设
:
,
:
.
(1)若
,且
、
均为真命题,求满足条件的实数
构成的集合;
(2)若
是
的充分条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f29c92d512015e87ce3bc18c1609e0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ecf6e070979a20a12d4ce7b485538ef.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](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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2022-06-27更新
|
1888次组卷
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6卷引用:第2章 常用逻辑用语 单元综合测试卷
名校
10 . 下列命题中为真命题的是( )
A.![]() ![]() |
B.“![]() ![]() |
C.已知p,q为两个命题,若“![]() ![]() |
D.命题“若![]() ![]() ![]() ![]() |
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