记不等式
表示的平面区域为
.命题
:
,
;命题
:
,
.下面给出了四个命题:①
;②
;③
;④
.这四个命题中,所有真命题的编号是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecfc3de448726184216829099aa2e96a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9309362eb34cd9d0d5757836f8d2fc55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/784233caa7547522af217838685c6864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0c5a96a4f87442cbfc05e59de281ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6664af2e9901b0a9b11b709ed2081f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b282201fb449f577cf664148afc9b2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97842fd0ea2ea493566e5b4e363daa5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d4eed113aa69a7d973c6410bae7ddf.png)
A.①③ | B.②④ | C.②③ | D.①④ |
更新时间:2020-02-28 09:09:19
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】给出两个命题,
的充要条件是x为正实数;
奇函数一定是单调函数,则下列命题是真命题的为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f191fab7bf50e2fafc70a8b9c4af9b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
解题方法
【推荐2】已知命题
:
的虚部为
;命题
:在复平面内,复数
对应的点位于第二象限.则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/220e8ab7ed3908f62c2fea76191f5b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adad9633b73dfbbb3d84b4f15979e99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16d0d95bd1a045e32a4a753e94566d2.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】以下不等式所表示的平面区域中包含原点的是( )
A.x-y+1<0 |
B.2x+3y-6>0 |
C.2x+5y-10≥0 |
D.4x-3y≤12 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】已知点p(x,y)是直角坐标平面中的点,则“p∈{(x,y)|y≤2x+1}”成立是“p∈
成立的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1de21110358f2af8e13caf6d1e66022.png)
A.充分而不必要条件 | B.必要而不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
【推荐2】在直角
中,
是直角,CA=4,CB=3,
的内切圆交CA,CB于点D,E,点P是图中阴影区域内的一点(不包含边界).若
,则
的值可以是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/6e205f89-9bbd-4d6d-8fea-c4ad276efcdf.png?resizew=150)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba29880c59672fb6d73721169439d053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/6e205f89-9bbd-4d6d-8fea-c4ad276efcdf.png?resizew=150)
A.1 | B.2 | C.4 | D.8 |
您最近一年使用:0次