名校
解题方法
1 . 函数
的部分图象大致为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c3163cc119c6a0947f840047be5f756.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2021-02-04更新
|
508次组卷
|
5卷引用:湖北省腾云联盟2021-2022学年高三上学期10月联考数学试题
2 . 下列四个结论:
①若
,则
恒成立:
②命题“若
,则
”的逆否命题为“若
,则
”;
③“命题
为真”是“命题
为真”的必要不充分条件;
④命题“
,
”的否定是“
,
”.
其中正确结论的个数是
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d9c89d2cd1fb46b1e71ad10227c098.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c60fe208aac852ce111baa3e6ac49b47.png)
②命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1b7f2c81d04b6966545527a35d0a76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d93246539f83796d6b2101b7bf0c7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac1b64cb76717bd87cd068fbaf1cf6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3a4e30599f43bbe195c69c2f9d1b57.png)
③“命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/094543346d88c4ed45c1b1fb91f5265b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d426f0f57b67c00ab87e81c9d1d5ef1.png)
④命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5045fac5d3e723196c600dcad6628bf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ec0559717f9c180c4051d053adc7156.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9613863e39be8bf460abdf43571dca91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4dc0f4b718fd09105a7986beacd1a1.png)
其中正确结论的个数是
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次