名校
1 . 给出下列四个结论:
①“
”是“函数
为奇函数”充要条件;
②若
,则
;
③“若
,则
.”的否命题是“若
,则
”;
④设
,
均为单位向量,则“
”是“
”的充要条件.
正确的命题有( )个.
①“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd68a195c5cb3c3a82d6b6e15e841571.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d473e820f4d323eeeed8202e71048074.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fce53275289a476dcffb995047133d1.png)
③“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc1f08c7640e62e8717abf4d44a6c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b994673c62c6370c68f688161b50ffce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc1f08c7640e62e8717abf4d44a6c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe62b960778048dc1f1dee7278afc65.png)
④设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683bb14ea34e04e1646511b3b2610eb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5aa846a5b7c96fe2ce665eb1ea5f0e.png)
正确的命题有( )个.
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
名校
2 . 下列结论错误的是( )
A.命题“若![]() ![]() ![]() ![]() |
B.命题![]() ![]() ![]() ![]() |
C.“![]() ![]() |
D.若![]() ![]() |
您最近一年使用:0次
2020-11-28更新
|
337次组卷
|
4卷引用:吉林省长春市第二十九中学2020-2021学年高二上学期期末考试数学(理)试题
20-21高一上·江苏南通·阶段练习
名校
解题方法
3 . 下列命题中,真命题的个数是( )
①
的最小值是
;②
,
;③若
,则
;④集合
中只有一个元素的充要条件是
.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0388777f7bd43d5a7168b6f5b111032a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47f5622257db2ffe5e24fbd1e82099ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fc7012c2a7eff4f5b3dc6636d86b5cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6204ebd38f7dcba36e4086998680046c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a479511a50da604b2fc7398617db8387.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4de3719d05ca71bac17de4bf5f7a6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f17dfeae5e3db3f0c6408d7e5ccbf900.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-10-21更新
|
633次组卷
|
6卷引用:吉林省吉化第一高级中学校2021-2022学年高二下学期复课检测数学试题
名校
4 . 已知
:直线
与圆
:
有交点;
:
,
为
的内角,若
,则三角形为等腰三角形.若
或
为真,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/a4aafea08192eb812a06147bdb7e8dbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b883d9703a1deaf8dbc18097c6b8bb2b.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/f0a532e15e232cb4b99a8d4d07c89575.png)
A.![]() | B.![]() ![]() | C.![]() | D.![]() |
您最近一年使用:0次
5 . 下列推理正确的是( )
A.因为![]() ![]() ![]() |
B.如果不买体育彩票,那么就不能中大奖,因为你买了体育彩票,所以你一定能中大奖 |
C.如果![]() ![]() |
D.如果![]() ![]() |
您最近一年使用:0次
2020·北京·模拟预测
名校
6 . 下列选项中,说法正确的是( )
A.“![]() ![]() |
B.若向量![]() ![]() ![]() ![]() |
C.若![]() ![]() |
D.“![]() ![]() |
您最近一年使用:0次
2020-04-28更新
|
453次组卷
|
5卷引用:吉林省长春市第一五一中学2020-2021学年高二上学期第一次月考数学试题(普通班)
7 . 已知命题
是
的充分条件;命题
若
,则
,则下列命题为假命题的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4483814a83cce3d0f044a9cb8cf796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63af71b9e6f71cd26e6e97541154cd8c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-04-11更新
|
743次组卷
|
3卷引用:吉林省洮南市第一中学2020-2021学年第一学期高二期中考试数学(文)试题
名校
8 . 已知命题
,
,
,则
;命题
,
是两条不同的直线,
,
是两个不同的平面,若
,
,
,则
,则下列命题为真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab974890b0706d30d14d1ec0d610610a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab10594b7dadac5b712b031bf3f4e0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc597b4887651e79f55670147a8d36b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa3205b1df826d63914dcb55bb3ab43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91945e07ec0273ea97957957fb2bccd.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/7a93a52c2b943e4c70ace99ed802d2b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe920cd78db25f5b4df37d066e57800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53cd751c44ad4d9ebd8e3243e751321.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f747152f006301e03b643afb80195c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 若a、b、c,d∈R,则下面四个命题中,正确的命题是( )
A.若a>b,c>b,则a>c | B.若a>-b,则c-a<c+b |
C.若a>b,则ac2>bc2 | D.若a>b,c>d,则ac>bd |
您最近一年使用:0次
2020-01-10更新
|
316次组卷
|
3卷引用:吉林省吉林市朝鲜族四校2019-2020学年高二上学期期末联考数学(文)试题
名校
10 . 下列有关命题的说法正确的是
A.命题“若![]() ![]() ![]() ![]() |
B.![]() ![]() |
C.命题“若![]() ![]() |
D.命题“若![]() ![]() |
您最近一年使用:0次
2019-12-02更新
|
231次组卷
|
3卷引用:吉林省延边朝鲜族自治州延吉市第二中学2019-2020学年高二上学期期中数学(文)试题