11-12高三上·广东中山·阶段练习
1 . 给出下列四个命题:①不等式
的解集为
;②若函数
为偶函数,则
的图象关于
对称;③若不等式
的解集为空集,必有
;④函数
的图像与直线
至多有一个交点,其中所有正确命题的序号是______________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebff6619f0334a3494d94c6cacf2f2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac26316a81c21a9bf2ca026fc50fe559.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b727eb9da56be079445321cf61cf26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e03ac80db50a7ebc73446c4b81a052fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ede78fd7ac619ea597856254bb5d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b53b86bd516400d6fa7dabb3603f31.png)
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2 . 给出下列命题:
(1)设
是两个单位向量,它们的夹角是
,则![](https://img.xkw.com/dksih/QBM/2015/3/27/1572039484604416/1572039490215936/STEM/6499ff305c7d4bb6b5f368b6819dac56.png)
;
(2)已知函数
,若函数
有3个零点,则0<
<1;
(3)已知函数
的定义域和值域都是
,则
=1;
(4)定义在R上的函数
满足
,则
.
其中,正确命题的序号为 .
(1)设
![](https://img.xkw.com/dksih/QBM/2015/3/27/1572039484604416/1572039490215936/STEM/2f30d3fcba0945ae969ad1eb9edc894e.png)
![](https://img.xkw.com/dksih/QBM/2015/3/27/1572039484604416/1572039490215936/STEM/48b6c0518220426b885d9f82ad7f6b96.png)
![](https://img.xkw.com/dksih/QBM/2015/3/27/1572039484604416/1572039490215936/STEM/6499ff305c7d4bb6b5f368b6819dac56.png)
![](https://img.xkw.com/dksih/QBM/2015/3/27/1572039484604416/1572039490215936/STEM/36eaaeb747cf499da565999380af99c2.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd574f26c275b8aad0d6d39a0d3fc37a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a96c1cfecb7d2f8d4d949daf982f5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)已知函数
![](https://img.xkw.com/dksih/QBM/2015/3/27/1572039484604416/1572039490215936/STEM/0d8d2ca927db4724af2fc18e690397fc.png)
![](https://img.xkw.com/dksih/QBM/2015/3/27/1572039484604416/1572039490215936/STEM/93b980ab046f44a6ac05921c1d1927b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
(4)定义在R上的函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc4c8fd1eea02850e3b0a0b45715a1ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20a25ebf7c9c31ebb3ee2a372852fc9.png)
其中,正确命题的序号为 .
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12-13高三上·广东东莞·阶段练习
3 . 已知条件
,条件
,且
的一个充分不必要条件是
,则
的取值范围是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e39c0b69d4566383a6f65531e60d74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b87fd1befcd24bcd252f69181cd95bbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78e159ce943e8a60be808461aeff52a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5bab1ff5c4a0aebb35c9b1f1f528939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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4 . 下列说法中,正确的是
A.命题“若![]() ![]() |
B.设![]() ![]() ![]() ![]() ![]() |
C.命题“存在![]() ![]() ![]() ![]() |
D.设![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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2011·广东·一模
5 . 给出如下三个命题:
(1)若“
且
”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)在
中,“
”是“
”的充要条件.其中不正确的命题的个数是
(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/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62d9960b239298ba4f4861224b00eb15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbb60c8c689819d191bb1aebd622b98.png)
A.3 | B.2 | C.1 | D.0 |
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