名校
1 . 给出以下命题:
(1)已知回归直线方程为
,样本点的中心为
,则
;
(2)已知
,
与
的夹角为钝角,则
是
的充要条件;
(3)函数
图象关于点
对称且在
上单调递增;
(4)命题“存在
”的否定是“对于任意
”;
(5)设函数
,若函数
恰有三个零点,则实数m的取值范围为
.
其中不正确 的命题序号为______________ .
(1)已知回归直线方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25df027f2bdf65a1ffdd03fc2608377.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92418f910b93502041350259b221ea34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb65513075a26d16bb69f2ed550c0791.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5112cbffb04be482ca0b09bdb9b5df35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ba49b31a5afc390ac8835fe5ebbb66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(3)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a1d1d16dc32dfbe9bb9154e97664341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c16c64869cf25374d05b130415a5013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4e10dc60362ba61cd036365eb4d2caa.png)
(4)命题“存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25e2acc37cf685dbd258ef9cffd40a3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffa64caceb1a517814c8756c0246bc8.png)
(5)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ae58ac8693a7f5f7570b6cbdb5c07c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e409849c921f4868c5a78abffb9f74bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27cf818dd484cc4cebd40a5f28eb8e9f.png)
其中
您最近一年使用:0次
2020-07-11更新
|
446次组卷
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5卷引用:云南省红河州2019届高三复习统一检测数学(文)试题
云南省红河州2019届高三复习统一检测数学(文)试题(已下线)第一单元 集合与常用逻辑用语(A卷 基础过关检测)-2021年高考数学(文)一轮复习单元滚动双测卷云南省红河州2019届高三高考数学(文科)模拟试题四川省成都市第十二中学(川大附中)2021届高三第二次模拟数学试题(已下线)课时04 命题的形式及等价关系-2022年高考数学一轮复习小题多维练(上海专用)
名校
解题方法
2 . 给出下列四个结论:
①命题“
,
”的否定是“
,
”;
②已知
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212381ec0dbd7f351b18b78f2398ab3a.png)
;
③若
,且
,则
;
④函数
的最小值为2.
其中正确结论序号为_________________ .
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b267be39f7c364531991c398a8e8fe7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dd189f8e2572c0ba9d8a85a1d9bbe43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0c949ecf36cde66db2ab00146f9f7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f0d6e7859fe1c7bb920ca8b31f19a59.png)
②已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbd27695cdeb63ceba5fefe9443110e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a2ccb66eb414aefc79d784eddf974a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212381ec0dbd7f351b18b78f2398ab3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f86b86a6ccdf2c077d195db7bc380ea.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c38a21483a2dc328d2e0b1d1b62599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed670b1f668778c6243f3f7470ee7d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7ea5d71ca3976bd564386b0607a26c6.png)
④函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6155cbdc379b3d73414c7d76806fd6ff.png)
其中正确结论序号为
您最近一年使用:0次