名校
1 . 已知命题“若
是偶数,则
都是偶数”,则该命题的逆命题、否命题、逆否命题3个命题中,真命题的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
A.3 | B.2 | C.1 | D.0 |
您最近一年使用:0次
2022-12-06更新
|
91次组卷
|
2卷引用:陕西省咸阳市实验中学2021-2022学年高二上学期第二次月考文科数学试题
名校
解题方法
2 . 已知集合
,集合
.
(1)是否存在实数
,使
是
的充分条件?若存在,求出
的取值集合;若不存在,请说明理由;
(2)是否存在非负实数
,使
是
的必要条件?若存在,求出
的取值集合;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a59efe8739c17ed39fc3e668add6b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec10bd77a8660c75bd08536a79a99e6b.png)
(1)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/320a7c616f6f7207a0a38bb707ac2205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8647b00cc8c8f35555c7d78cf2812c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)是否存在非负实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/320a7c616f6f7207a0a38bb707ac2205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8647b00cc8c8f35555c7d78cf2812c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
3 . 已知命题p:实数x满足
,命题q:实数x满足
.
(1)若p是q的充分不必要条件,求实数m的取值范围;
(2)若
,
为真命题,求实数x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65691d3e27436db3e35b1191c174a050.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9c4e8e0e6269f9c95c177024bf3a30.png)
(1)若p是q的充分不必要条件,求实数m的取值范围;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7a1d739890a8951586e23b78b035bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
您最近一年使用:0次
2022-12-06更新
|
66次组卷
|
2卷引用:陕西省咸阳市实验中学2021-2022学年高二上学期第三次月考理科数学试题
名校
4 . 下列结论中不正确的个数是( )
①命题“所有的四边形都是矩形”是特称命题;
②命题“
,
”是全称命题;
③若命题p:
,
,则
:
,
.
①命题“所有的四边形都是矩形”是特称命题;
②命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad5fe274cfc8da2dacfb65801f344ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ff050e8101751af6b5cf052e25c410.png)
③若命题p:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb42c47d4a2263e0eb4edfdc0c2ddced.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad5fe274cfc8da2dacfb65801f344ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb42c47d4a2263e0eb4edfdc0c2ddced.png)
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
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5 . 已知命题“若
,则
、
、
中至少有一个非负数”,则该命题的逆命题、否命题、逆否命题3个命题中,真命题的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/918ab4849680e6e3a0bb6d8657bdfdd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
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6 . 已知
:
,
:
.若
是
的充分不必要条件,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/779e53c03d8e9f407239a3f90982e41f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4c310f84bc51195fbe10a717733f4d.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/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-12-06更新
|
129次组卷
|
4卷引用:陕西省咸阳市实验中学2021-2022学年高二上学期第二次月考理科数学试题
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7 . 设有下列四个命题:
:若
,则
;
:
,
;
:关于
的方程
有两个不相等的实数根;
:函数
的最小值是2.
则下述命题中,所有真命题的序号是______ .
①
;②
;③
;④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be646cd52d7f2f1714e7542e75810f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12bcbf68a8ea418d76a7feaed3cbc69a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bfbcb1601dc523100ae92bfe6406b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adad9633b73dfbbb3d84b4f15979e99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c12e17e20663e384f0e193b4435c13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09fc4b75845cb14b2d3c4e2110e460c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b21b872313f7d8c5b606981f954a1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9acf4ad45157af36b2979af91e3f8b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc119550ce4fc5f3d1daf996e7243bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb5178fc15996dac462468514a4ff69.png)
则下述命题中,所有真命题的序号是
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d7af433a01e0819931d64d634b705e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0b20e78c72654c3c23c232098c04f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a72285af7a5a3d8ce46807192f374e06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b798cc94cdc2c9e71b9ab8227877ac2.png)
您最近一年使用:0次
2022-12-06更新
|
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|
3卷引用:陕西省咸阳市实验中学2021-2022学年高二上学期第二次月考理科数学试题
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8 . 已知全集
,集合
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dcaf41cda5c2df78a0ed2ac97277ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60280fc6e2e99f453c23fceeff043ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/361048fd1b1a7f3b7230404a04b7155a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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9 . 下列说法正确的是( )
A.命题“若幂函数![]() ![]() ![]() ![]() ![]() ![]() |
B.已知命题![]() ![]() ![]() ![]() ![]() |
C.命题“![]() ![]() ![]() |
D.若命题![]() ![]() |
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10 . 若命题“存在
,使得
”为假命题,则实数
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea847ac3dc234b7892744e0f3af2feb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2d940ff1b4ae840de5d092421cfa301.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
2022-11-14更新
|
92次组卷
|
2卷引用:陕西省西安市高新第一中学2021-2022学年高二上学期期中理科数学试题