给出下列两个命题:
:
,
,
:若
,则
,那么下列命题为真命题的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be646cd52d7f2f1714e7542e75810f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485a4756c56f1126b9825d5019d544c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83f5fb2ea8c3b49c4352ffd6363bee54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adad9633b73dfbbb3d84b4f15979e99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64a0334f686b3d2c7f8bb2b961ce3d68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1a2cbcc1fb41a01668f1808267df4d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2018-03-04 21:16:51
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【推荐1】已知命题
;命题
,直线
与圆
有公共点,若
或
为真,
且
为假,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c612147fce15a661d8c3b12bdf45f8b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f7d4b5ca811a0edd1c7de831b531365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d803fe6954bfc4fdec26f10b2e87d7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d21337948aad0b682df734b1b614a4f1.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/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】已知命题p:若
则
;命题q:在
中,若A>B则sinA>sinB,下列命题为真命题的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8a31e8b54af0443f1755e37ab1d708.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810d822772b8ebc1c311892f7e7e3aeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐1】给出如下四个命题:
①若“
或
”为假命题,则
均为假命题;
②命题“若
且
,则
”的否命题为“若
且
,则
”;
③若
是实数,则“
”是“
”的必要不充分条件;
④命题“若
则
”的逆否命题为真命题.
其中正确命题的个数是( )
①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/0cd5371a6f0f82c65dd22f75f8b807c1.png)
②命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27f27cbb8185c1974d715ff95f8801c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d97c5dd615b7752e1eb6c139891f54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76478bcf12d74ea096b0a46bd6bdf649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200849ce71f53c0321506e27de437b8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b0a2c46148393f1d7104d75e03522bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c4ba63ab8d2e34c6714f87698852cff.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dea38fc8608796971bcd301387202eb.png)
④命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9c283bf658f24eab47f05b10f84e9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce22028b0472ba0c4db9c3179e963ad2.png)
其中正确命题的个数是( )
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐2】已知命题
;命题
,则下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aef17e7e15bbf13049bdba79d7f73778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a6f8e794bf86dd30a58529b0c97b59.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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(0.65)
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【推荐1】已知命题
,
,命题
,
,则下列命题为真命题的个数是
①
;②
;③
;④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e562c57714f8075ddaa7581571698e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57a540c438d431180bddfaf0c3944be9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59019039db4c1bdbd30253ecd14b8885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edfb5839c14229e395f6a5a8cb8ab33e.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17312706507512c4215edf8b6e8c16d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e796d1dba0132636cb56a325d57add1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e29e70dc0bc2a9cf1a5feb67d439566.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】命题p:存在x∈,使sin x+cos x>
;命题q:“∃x∈(0,+∞),ln x=x-1”的否定是“∀x∈(0,+∞),ln x≠x-1”,则四个命题:(
p)∨(
q),p∧q,(
p)∧q,p∨(
q)中,正确命题的个数为( )
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次