名校
1 . 命题“
,使得
”的否定是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81c83d3dcb55d88a16be9e89b833761a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1b0c77496ad448e86c739a6e7897c69.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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2 . 命题“
”的否定是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d184d8d0fdf32451caf5ea9d6484697e.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
名校
3 . 若命题
,使
,则
为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/248d3fb187b56abeb0317dee8ae6a010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50db3c0133c87759461a1692725d208b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
您最近一年使用:0次
2017-11-03更新
|
202次组卷
|
4卷引用:【全国市级联考】山东省潍坊市普通高中2017-2018学年高二下学期模块检测数学文试题
4 . 命题“
,
”的否定是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1634811a5cb91545c19e2582a92bda5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587ffb9921632362eeab3a23be69fd44.png)
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解题方法
5 . 已知命题
:
,
,则命题
的否定
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485a4756c56f1126b9825d5019d544c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59ff11308ccc2364f8374839f8810edb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2020-03-04更新
|
57次组卷
|
3卷引用:山东省济宁市兖州区2019-2020学年高二上学期期中数学试题
6 . 下列命题正确的个数是
(1)命题“若
,则方程
有实根”的逆否命题为:“若方程
无实根,则
”;(2)对于命题
:“
,使得
”,则
:“
,均有
”;(3)“
”是“
”的充分不必要条件;(4)若
为假命题,则
均为假命题.
(1)命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac671e6d87de2fb5f7ad3aab582866d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac671e6d87de2fb5f7ad3aab582866d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a878fd5a7104a7f42770a19097d56457.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485a4756c56f1126b9825d5019d544c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/264dab145ceba44696a6ee63b1e1549d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba1c77d129b56255baf3d76eb2a6c2ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e30c903d8f8a05332af0b19e7e40df3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a8a2a94168af9b16ce89271a5d8dc6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5371a6f0f82c65dd22f75f8b807c1.png)
A.4 | B.3 | C.2 | D.1 |
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7 . 命题“存在
,使
”的否定是
![](https://img.xkw.com/dksih/QBM/2013/3/21/1571156139974656/1571156144963584/STEM/3f02e2fef6e44e76aa30fefdea1d5249.png)
![](https://img.xkw.com/dksih/QBM/2013/3/21/1571156139974656/1571156144963584/STEM/7ba8fed36fba4c78ac8c0e1a5ee363f0.png)
A.存在![]() ![]() |
B.不存在![]() ![]() |
C.对于任意![]() ![]() |
D.对于任意![]() ![]() |
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11-12高三上·山东聊城·期中
8 . 下列命题:
①命题“∃x∈R,x2+x+1=0”的否定是“∃x∈R,x2+x+1≠0”;
②若A={x|x>0},B={x|x≤﹣1},则A∩(∁RB)=A;
③函数f(x)=sin(ωx+φ)(ω>0)是偶函数的充要条件是
(k∈Z);
④∀x∈(0,π),sinx>cosx.
其中正确命题的序号有其中正确命题的序号有_________________ .
①命题“∃x∈R,x2+x+1=0”的否定是“∃x∈R,x2+x+1≠0”;
②若A={x|x>0},B={x|x≤﹣1},则A∩(∁RB)=A;
③函数f(x)=sin(ωx+φ)(ω>0)是偶函数的充要条件是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa1849bb9c0718845f3297348423b9b.png)
④∀x∈(0,π),sinx>cosx.
其中正确命题的序号有其中正确命题的序号有
您最近一年使用:0次
9 . 给出下列命题:
①“若
,则
有实根”的逆否命题为真命题;
②命题“
”为真命题的一个充分不必要条件是
;
③命题“
,使得
”的否定是真命题;
④命题
函数
为偶函数,命题
函数
在
上为增函数,
则
为真命题.
其中,正确的命题是( )
①“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3a34d6f60032718820c3da2b07786b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/993ea6c5b7f75bfc46240c3c492dbfae.png)
②命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99aba9ade0e5cd3014168e1e5e27d871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f184ef9e0d57554e95f369c9d4bbfea1.png)
③命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fce141204a83935f3330a9ab335a7a2d.png)
④命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40fef0cdf69fbfc7b28c307c0e7922d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/326cf04a5cdd2a59c66ad0e0498a9a97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e29e70dc0bc2a9cf1a5feb67d439566.png)
其中,正确的命题是( )
A.①② | B.①③ | C.②③ | D.③④ |
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10 . 已知命题
:
,
,那么
是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f8cfaced06b178fac78de9dc5abed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b50a4b58f727c7af429a20e8210996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a037d29525d118dc083dc3e5e808ca2b.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次