1 . 设
:实数
满足
,
:实数
满足
.
(Ⅰ)当
时,若
为真,求实数
的取值范围;
(Ⅱ)当
时,若
是
的必要条件,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/4e214ee67f5ab6252520118d1c718b3a.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/1495e524e9341750e16d3a7033829da0.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e26b38e357c7d985656ba7bb3c794a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2018-07-17更新
|
1986次组卷
|
8卷引用:【市级联考】河北省廊坊市2018-2019学年高二第二学期期中联合调研考试文科数学试题
【市级联考】河北省廊坊市2018-2019学年高二第二学期期中联合调研考试文科数学试题河北省廊坊市2018-2019学年高二第二学期期中联合调研考试文科数学试题【全国校级联考】福建省龙岩市一级达标校2017-2018学年高二下期期末考试文科数学试题安徽省江南片2019届高三上学期开学摸底联考理科数学试题(已下线)专题1.2 命题及其关系、逻辑联结词、充分条件与必要条件-《2020年高考一轮复习讲练测》(浙江版)(已下线)专题1.2 全称量词与存在量词、充要条件(讲)-2021年新高考数学一轮复习讲练测四川省凉山州2019-2020学年高二上学期期末考试数学(理科)试题(已下线)专题1.2 全称量词与存在量词、充要条件(讲)- 2022年高考数学一轮复习讲练测(新教材新高考)
2 . 命题
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2ed4af483aecf0fe83185b33654994.png)
A.![]() ![]() ![]() |
B.![]() ![]() ![]() |
C.![]() ![]() ![]() |
D.![]() ![]() ![]() |
您最近一年使用:0次
3 . 设有下面四个命题
若
,则
;
若
,则
;
若
,则
;
若
,则
.
其中真命题的个数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a617a9b648bfb804eb7ac1cf357f8a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cf706a8ca6f14007709ebd498468435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f731aa23c326a79f5a97c0b805166272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab27c8e69c6c5da2853c1f83731af5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c00a14e48f872d1eb1a35ef0488ede2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ae3c3c8f3d94894cbd783960ca9c8a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/558ccfd65a6b27128652ee51eff27bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea6bbc3cb8d6447e919600d87bc45ef8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/428f740d77d1a1f4303effd6c1e87028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f9eec8bc0787225f25d8a644c45b1c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fc42656bff27e4237752415dc54885d.png)
其中真命题的个数为
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 设有下面四个命题
若
,则
;
若
,则
;
若
,则
;
若
,则
.
其中真命题的个数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a617a9b648bfb804eb7ac1cf357f8a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cf706a8ca6f14007709ebd498468435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f731aa23c326a79f5a97c0b805166272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1717c5c594742fb23205d7bca1425bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c61e9a0e401284ec9617700d269bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ae3c3c8f3d94894cbd783960ca9c8a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d69d72e9bd2527f42f6ba3532e4561e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/428f740d77d1a1f4303effd6c1e87028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95c582958364c21b3b0d24119e39b6a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc75c0cdab0e691ca09654a839b89f4.png)
其中真命题的个数为
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
5 . 给出下列四个命题:①若
,则
;②若
,则
;③若
,则
;④若
,
且
,则
的最小值为9;其中正确命题的序号是______ (将你认为正确的命题序号都填上).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec8201ff29a2091d40eee10db6bbc1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a730f248efcbff2abfd3229f00f355c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23e36a495d9347d7ef80a27331c2bf26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/536178538dd8176b8743e3ceb94523a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f008cea432b68934066d32243ccf69bf.png)
您最近一年使用:0次
2018-06-24更新
|
214次组卷
|
2卷引用:【全国百强校】河北省辛集中学2017-2018学年高一6月月考数学试题
6 . 已知集合
,
,现有下面四个结论
①
;②
;
③
;④
的真子集的个数为
.
其中正确结论的个数是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982682114d4b7b308710f00f89f4f203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f9b15dfe9df2d588dca4dc123c98eb.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a8216a51e8f3648a62ba28d7ae72702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ad63035f618b1ba69c30eb5871ac7b8.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7380823c7b34ee0dae31abd33da3737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
其中正确结论的个数是
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
7 . 下列有关命题的说法正确的是( )
A.“![]() ![]() |
B.“![]() ![]() |
C.直线![]() ![]() ![]() ![]() ![]() ![]() |
D.命题“若![]() ![]() |
您最近一年使用:0次
2018-06-05更新
|
349次组卷
|
3卷引用:【全国百强校】河北省曲周县第一中学2017-2018学年高二下学期期末考试数学试题
【全国百强校】河北省曲周县第一中学2017-2018学年高二下学期期末考试数学试题2018年5月20日 每周一测——《每日一题》2017-2018学年高二文科数学(已下线)2019年5月5日 《每日一题》文数-每周一测
8 . 记
表示大于
的整数
的十位数,例如
,
.已知
,
,
都是大于
的互不相等的整数,现有如下
个命题:
①若
,则
;②
,
且
;
③若
是质数,则
也是质数;④若
,
,
成等差数列,则
,
,
可能成等比数列.
其中所有的真命题为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b541ede2303267a0dbd0c9ed12949afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1bf5012ba5cc38255cafd0e429789c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5302f8a0379b9756615c74e0ed598fb6.png)
![](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/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7be170b4d7262063a9e0e28e9e5a677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2049e8fa688ef1a7d20a01435bc4126b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3809f4cc7c153f0eeb9c3074975f7f24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e816432c37bbf3e8f2145d28275e721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/512714c1a4d6d38855ed84bda0834569.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b541ede2303267a0dbd0c9ed12949afa.png)
![](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/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4f0c8349ac63082412068551dbb65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b541ede2303267a0dbd0c9ed12949afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6466f218a5538d088b8f3269c9c0ae6a.png)
其中所有的真命题为( )
A.② | B.③④ | C.①②④ | D.①②③④ |
您最近一年使用:0次
名校
9 . 下列命题中,不是真命题的是
A.命题“若![]() ![]() |
B.“![]() ![]() ![]() |
C.命题“若![]() ![]() |
D.“![]() ![]() |
您最近一年使用:0次
2018-03-06更新
|
1172次组卷
|
7卷引用:河北省保定市2017-2018学年高二上学期期末调研考试数学(文)试题
名校
10 . 在命题“若m>-n,则m2>n2”的逆命题、否命题、逆否命题中,假命题的个数是________ .
您最近一年使用:0次
2018-08-31更新
|
199次组卷
|
7卷引用:2016-2017学年河北武邑中学高二9月月考数学(文)试卷1
2016-2017学年河北武邑中学高二9月月考数学(文)试卷12016-2017学年河北武邑中学高二9月月考数学(文)试卷2甘肃省肃南县第一中学2017-2018学年高二上学期期中考试数学(理)试题(已下线)学科网2019年高考数学一轮复习讲练测 1.2常用逻辑用语【江苏版】测(已下线)2019高考热点题型和提分秘籍 【理数】专题2 命题及其关系、充分条件与必要条件( 题型专练)(已下线)专题1.2 命题及其关系、充分条件与必要条件-2021年高考数学(理)一轮复习-题型全归纳与高效训练突破四川省乐山市峨眉第二中学校2022-2023学年高二下学期期中数学文科试题