名校
1 . 命题:“若a<0时,则一元二次方程x2+x+a=0有实根”与其逆命题、否命题、逆否命题中真命题的个数是( )
A.0 | B.2 | C.4 | D.不确定 |
您最近一年使用:0次
2 . 下面判断错误的有( )
①函数
关于直线
对称
②命题“若
,则
”是真命题
③命题“若
,则函数
只有一个零点”的逆命题为真命题
④若
为奇函数,则对定义域内的任意
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e59f3f081ff3b00b3ab35377211561a.png)
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1254fba8c4b362c4686c838686396be3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a2ec02caf837c6e7e0b76dd9acc7f0.png)
②命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f028aa6e01673382353627c499d00aef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c9f10038308258f981c903c54a3902.png)
③命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a12e04dcaf2cde31b57e86a3b41f471.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/570df03fef42aece12560212ba3a64e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e59f3f081ff3b00b3ab35377211561a.png)
A.0个 | B.1个 | C.2个 | D.3个 |
您最近一年使用:0次
名校
3 . 下列判断错误的有( )
①命题“
,
”的否定是“
,
”
②命题“若
,则
”是真命题
③命题“若
,则函数
只有一个零点”的逆命题为真命题
④若
为奇函数,则对定义域内的任意
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e59f3f081ff3b00b3ab35377211561a.png)
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dd2dea76acbb2d3fd7b0239f1b2dd33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c7a319f1fb9ef4cd6bd9eb5ab0c53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55f71fe1c216e4fe18fcbd2c5a5ec082.png)
②命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f028aa6e01673382353627c499d00aef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c9f10038308258f981c903c54a3902.png)
③命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a12e04dcaf2cde31b57e86a3b41f471.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/570df03fef42aece12560212ba3a64e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e59f3f081ff3b00b3ab35377211561a.png)
A.3个 | B.2个 | C.1个 | D.0个 |
您最近一年使用:0次
2021-12-07更新
|
697次组卷
|
3卷引用:内蒙古呼和浩特市2022届高三年级质量普查调研考试文科数学试题
4 . 下列四个命题:(1)“在
中,若
,则
”的逆命题;(2)“若
,则
”的逆否命题;(3)“若
,则
”的逆命题.(4)“若
,则
”的否命题;其中是真命题的为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17b942da8eb96ccaba52589082756616.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce6f337c00a6d4bf1e7580d8888db3d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3019b662e5dc2750bb6f9199d3250f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e45282f510834876fda4c8feef5487.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf5821f59d12217af9a3804379c8231f.png)
A.(1)(4) | B.(2)(3) | C.(1)(3) | D.(2)(4) |
您最近一年使用:0次
2021高三·全国·专题练习
解题方法
5 . 已知动圆过定点
,且在
轴上截得的弦长为
,动圆圆心的轨迹方程为
,命题“如果直线
过点
且与轨迹
交于
、
两点,那么
恒成立”,写命题的逆命题,判断它是真命题还是假命题,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e32f16d75ccb62a04970f861827fca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63309dbc3612815f6dbdee23d9a10adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e77a2865ee0a885848caf8888a0bc389.png)
您最近一年使用:0次
6 . 命题p:“若a<b,则a3<b3”的逆命题为q,则p与q的真假性为( )
A.p真q真 | B.p真q假 | C.p假q真 | D.p假q假 |
您最近一年使用:0次
7 . 下列四个结论:①设
为向量,若
,则
恒成立;②命题“若
,则
”的逆命题为“若
,则
”;③不等式
解集为
;
其中正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0bdfea687d58da88b42064628fbc2ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d76ee2e81f447f84a3e0b39c0388ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d10805fbb6b50f351305edfa18c7fcfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f0e9c04402a0ffdaa25c3e3c82c7dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0563035d307e1e12c2ad967fd20fff11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa46657e1ce3a4c50a391db666ae2dfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f7dcc0832fc9f886956915ffd9447f3.png)
其中正确结论的个数是( )
A.1个 | B.2个 | C.3个 | D.0个 |
您最近一年使用:0次
2021高三·全国·专题练习
8 . 下列命题中的真命题是( )
①“若
,则
、
不全为零”的否命题;
②“正多边形都相似”的逆命题;
③“若
,则
有实根”的逆否命题;
④“若
,则
是无理数”的逆否命题.
①“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b0527f3801a1f5fae326d9411555b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
②“正多边形都相似”的逆命题;
③“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac671e6d87de2fb5f7ad3aab582866d.png)
④“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07d7d3e4135f9307eaea21f8665fb893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.①②③④ | B.①③④ |
C.②③④ | D.①④ |
您最近一年使用:0次
9 . 下列命题正确的是( )
A.“![]() ![]() |
B.“若![]() ![]() ![]() ![]() |
C.“![]() ![]() |
D.“若![]() ![]() ![]() ![]() |
您最近一年使用:0次
名校
10 . 下列4个命题:
①“如果
,则
、
互为相反数”的逆命题
②“如果
,则
”的否命题
③在
中,“
”是“
”的充分不必要条件
④“函数
为奇函数”的充要条件是“
”
其中真命题的序号是( )
①“如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f1a686b80b8f109a929f58c2de7201d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
②“如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a566ee5d2d5029fe2b63838ede01cecb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0aa2ef928b6e3341d0a0dc6d8055b9.png)
③在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a0631f6fc44eae7a0e369206d33d3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d236e7315396d77ee666880edd1bef49.png)
④“函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070e57268ed65c8a60e89f1fb646f62a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fca1473d9e1b7c8cdf9f286c3f61513e.png)
其中真命题的序号是( )
A.①④ | B.①② | C.②④ | D.②③ |
您最近一年使用:0次
2021-05-07更新
|
377次组卷
|
2卷引用:四川成都市实验外国语学校2020-2021学年下学期高三开学考试文科数学试题