已知命题
;命题
,则下列命题中为真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca6a497536352a2855467891bf838b7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf8b4766d1686e7dc9b2022cb9a78f5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-05-28 06:59:20
|
相似题推荐
单选题
|
较易
(0.85)
【推荐1】下列结论错误的个数是
①命题“若
,则
”与命题“若
,则
”互为逆否命题;
②命题
,命题
,则
为真;
③“若
,则
”的逆命题为真命题;
④若
为假命题,则
、
均为假命题.
①命题“若
![](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/2930ea93d66c0384840dc39c701bda5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc8ad1f385cb7e1f0195e9ca9a26aa9.png)
②命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4280cc87e72e49fd3152aa0b61c68c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e2ec6804a997fe03233ffd0026f88c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
③“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91bcddc2ece6bcde9355e222e1cf9f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
A.0 | B.1 |
C.2 | D.3 |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐2】已知命题
,
;命题
不等式
恒成立,那么命题( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fac11dd95cb4b78adb817fad02dedb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4345285fcf47de72a6a9856b7bd82079.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90842522367e5cc8047de72520835a84.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐1】命题
,
,命题
抛物线
的焦点到准线的距离为
,那么下列命题为真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/248d3fb187b56abeb0317dee8ae6a010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4be5077a9199057fa6b40f9c34dd5958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef476b5e912aca6ae9494fcba5a2b2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐2】已知命题
若
,则
恒成立;命题
等差数列
中,
是
的充分不必要条件(其中
).则下面选项中真命题是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d660cb98d8f5b7a8730822993b3af85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aec17301111d0534a27c6361027ec07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb679318d0c9819b82e51a1750b502a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/791fc4e72ee82f52ac9a8bac95cce435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3707759c81e22c07a9b70b6a5456789.png)
A.(![]() ![]() ![]() | B.(![]() ![]() ![]() |
C.(![]() ![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐1】已知命题p:
,命题q:
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28118fe149f9a3dbf2c678b9797437a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8104ad5c978e70809cb0a7d2e38dcaf8.png)
A.“![]() | B.“![]() |
C.“![]() | D.“p∧¬q”是真命题 |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐2】下列说法正确的是( )
A.“若![]() ![]() ![]() ![]() |
B.![]() ![]() |
C.“若![]() ![]() |
D.命题“若![]() ![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐1】命题“∀x∈Z,x∈R”的否定是( ).
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐2】设命题p:梯形的对角线相等,则
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
A.梯形的对角线不相等 | B.有的梯形对角线相等 |
C.有的梯形对角线不相等 | D.不是梯形的四边形对角线不相等 |
您最近一年使用:0次