命题“若
,则
”,请写出它的逆命题、否命题、逆否命题,并判断它的真假.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b9d5aaaceaa3ac514d17fcfefbf9b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f63af5b9ea2d31a10c5730f3bdb868a.png)
18-19高一·全国·课后作业 查看更多[2]
更新时间:2019-10-30 10:35:27
|
相似题推荐
解答题-问答题
|
较易
(0.85)
【推荐1】判断下列命题的真假:
(1)命题“若
或
,则
”的否命题;
(2)命题“若
,则
”的逆否命题;
(3)命题“若
,则
”的逆否命题.
(1)命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c925c4283740ce6cc412c1c5f57b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d90774b87f30654aadc4d38230e97c.png)
(2)命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc5e9c51b9d0653fb8559828f19e6987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c34b9e054b33f5d43986e3876a13ae.png)
(3)命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad78dc8b8aed907b4fe9640c997454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9d50619b779c1056602f46b2a95e90.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】写出命题“若
,则
”的逆命题、否命题、逆否命题,并判断这四种命题的真假.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f7c54faca6eac8af5309942062058d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
【推荐1】写出命题“若
+(y+1)2=0,则x=2且y=-1”的逆命题、否命题、逆否命题,并判断它们的真假
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9443c443a12a5f96acd2f1170957bc0.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】判断下列命题的真假,并写出它们的逆命题、否命题、逆否命题,并判断其真假.
(1)若四边形的对角互补,则该四边形是圆的内接四边形;
(2)若在二次函数
中,
,则该函数图像与
轴有交点.
(1)若四边形的对角互补,则该四边形是圆的内接四边形;
(2)若在二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd8e512a7487934d542d8dcb3e48470b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9deb79d044a379f31a8fc57736d7ead.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐1】写出命题“已知,a b 是实数,若ab=0,则a=0或b=0”的逆命题,否命题,逆否命题,并判断其真假.
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】写出下列命题的逆命题、否命题、逆否命题,并判断真假.
(1)
,若
,则
;
(2)若
,则
都为
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27f27cbb8185c1974d715ff95f8801c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57a6639fd42e133464eaa7c2424be827.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fb20e291772c2614ad19f4cc919dfec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
您最近一年使用:0次