名校
1 . 命题
:方程
有两个不相等的正实根,命题
:方程
无实根,若“
或
”为真命题,“
且
”为假命题,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36bcb4df710cf7fc5a4159380ae5451e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/624d32463dfa336c88216b1bd7cd91da.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2 . 已知下列命题:
①命题“
,
”的否定是“
,
”;
②“
”是“
”的充分不必要条件;
③“若
,则
且
”为真命题;
其中真命题的个数为( )
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8645952ea14b25443f411d39bdec641e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d3a6268e9eded3dba57ab5d93cf556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aec0693231f71fc10f820c41823dd37.png)
②“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/055365d21f92fdb6881310bda08c3f75.png)
③“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34715101c66fa12ce6baf0a9c53f1672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a7df955fc17e92fd86302f8c34664a.png)
其中真命题的个数为( )
A.3个 | B.2个 | C.1个 | D.0个 |
您最近一年使用:0次
2023高三上·全国·专题练习
3 . 设有下列四个命题:
:两两相交且不过同一点的三条直线必在同一平面内.
:过空间中任意三点有且仅有一个平面.
:若空间两条直线不相交,则这两条直线平行.
:若直线
平面
,直线
平面
,则
.
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/a5493a7d6a94ddfc6179b9b30a92e4ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aadec0da2c6fcca0bf2545bb62a4aac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4ac8baf8dbbba3dd9933021a814d0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c60a302c4b1d8bc8c75cddae0cabc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f703808b3528bf794d8edf642de9c72e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233003466b5aae4068326b65b585335e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75350c0f16848247ec0602b0b9a55df.png)
则下述命题中所有真命题的序号是
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/586e98555015d11f2b8d8b7702965336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d7af433a01e0819931d64d634b705e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b4e53bf6e9c26e2f849d430d4e083f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b798cc94cdc2c9e71b9ab8227877ac2.png)
您最近一年使用:0次
名校
4 . 对于任意实数
,
,
,
,命题 ①若
,
,则
;②若
,则
;③若
,则
;④若
,则
;⑤若
,
,则
.
其中真命题的个数是 ( )
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fef20073a12bab727faa217718b63414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b34c5832f3fe28f48a924854cb8814ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c22b9d08cf536bbb76bce1b0f135772.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c22b9d08cf536bbb76bce1b0f135772.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb54b1b3617ebc502cb44194cbcd1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44cbc322861846709c08c7f1da746848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27f50ce6b511e6b928796e048fc7fa5c.png)
其中真命题的个数是 ( )
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
5 . 设
、
是两个不同的平面,
、
是两条不同的直线,
命题
若
,
,
,则
;
命题
若
,
,
,则
.
下列命题是真命题的是_______________ .
①
或
②
且
③
或
④
且
![](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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384a65ca1ee3d7d86b988ca34c885e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1754786a3367aca3da18ee3316e5b968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f157205cb5cb4a538b09d989f2d9ae95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18839099fb51cb1dda11653615ad0a5c.png)
命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff259ba50b735db32427fc0ebfbdfdaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb26a220ed44c446105df7caa0f1063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f157205cb5cb4a538b09d989f2d9ae95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44eee93d951b5a5b892fbfb0acde47af.png)
下列命题是真命题的是
①
![](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/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](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/9e26b38e357c7d985656ba7bb3c794a5.png)
您最近一年使用:0次
名校
6 . 下列命题:
①
;
②
;
③“若
,则
”的逆命题;
④“若
,则
的解集为
”的逆否命题,
其中真命题的个数是( )
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1d5b725d6b6f46c1c8973e8bc2bcea.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46cbe95c2a08c5ff8cb15238ceef4504.png)
③“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd851caf97d430a0c7d7ecd64871dd98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
④“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/483054aed81e8f73b8ea02756bb6d31e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
其中真命题的个数是( )
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
7 . 下列命题的否定是真命题的是( )
A.每个正方形都是平行四边形 |
B.![]() ![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
8 . 下列是真命题的是( )
A.函数![]() ![]() |
B.不等式![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
您最近一年使用:0次
名校
9 . 已知坐标满足方程
的点都在曲线C上,则下列命题中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bbbf52d1f9d61b41bdd4acfc9fac268.png)
A.曲线C上的点的坐标都适合方程![]() |
B.不在曲线C上的点的坐标必不适合方程![]() |
C.凡坐标不适合方程![]() |
D.不在曲线C上的点的坐标有些适合方程![]() |
您最近一年使用:0次
10 . 已知命题p:
;命题q:
.若p是真命题,q是假命题,求实数x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db258f3fcf81c1074509759e439b6f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afeccf0358c02b53554a0f6d3dc33cbd.png)
您最近一年使用:0次