1 . “函数
在区间
上不是增函数”的一个充要条件是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9210e75c35fb455d0446eb7ddba7d79c.png)
A.存在![]() ![]() | B.存在![]() ![]() |
C.存在![]() ![]() ![]() | D.存在![]() ![]() ![]() |
您最近半年使用:0次
2021-12-15更新
|
469次组卷
|
4卷引用:2.3函数的单调性和最值测试卷-2022-2023学年高一上学期数学北师大版(2019)必修第一册
21-22高二·全国·课后作业
2 . 下列四个命题:
①命题“
,
”的否定是“
,
”
②
,
是两个不同的平面,
,
,
,则
.
③函数
为
上的增函数.
④
.
其中真命题的个数是( )
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1077592ba24521a7a16d5de7993103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c7a319f1fb9ef4cd6bd9eb5ab0c53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b89f63dc9d7cbd7837c94d604ee5955.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c36e0eb09231aef187aa2c4f0ae26b98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb26a220ed44c446105df7caa0f1063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1b610e3c5b3d78a5730e7f3d736ac28.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8585ca73a54d7d43f2a7b234a7eb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3de1fb24a00c1744c6a946aec3fe9595.png)
其中真命题的个数是( )
A.0个 | B.1个 | C.2个 | D.3个 |
您最近半年使用:0次