写出命题:“若
,则
”的逆命题、否命题、逆否命题,并指出各个命题的真假.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
19-20高一上·上海浦东新·期末 查看更多[3]
上海市浦东新区2018学年高一第一学期期末质量测试数学试题吉林省长春市第一五一中学2020-2021学年高二上学期第一次月考数学试题(普通班)(已下线)大题好拿分必做30题(基础版)-2020-2021学年高一数学期末考试高分直通车(沪教版2020,必修一)
更新时间:2019-01-19 16:06:56
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相似题推荐
解答题-问答题
|
容易
(0.94)
【推荐1】把命题“当
时,
”写成“若
,则
”的形式,并写出它的逆命题、否命题与逆否命题,并判断它们的真假.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fdf7d28b97fb6fe731703f80e122ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
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解答题-问答题
|
容易
(0.94)
【推荐2】把下列命题作为原命题,分别写出它们的逆命题、否命题和逆否命题,并判断其真假.
(1)若α=β,则cos α=cos β;
(2)若x2+7x-8=0,则x=-8或x=1.
(1)若α=β,则cos α=cos β;
(2)若x2+7x-8=0,则x=-8或x=1.
您最近一年使用:0次
解答题-问答题
|
容易
(0.94)
【推荐2】把命题“当
时,
”写成“若
,则
”的形式,并写出它的逆命题、否命题与逆否命题,并判断它们的真假.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fdf7d28b97fb6fe731703f80e122ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
您最近一年使用:0次
解答题-问答题
|
容易
(0.94)
【推荐1】当c<0时,若ac>bc,则a<b.请写出该命题的逆命题、否命题、逆否命题,并分别判断真假.
您最近一年使用:0次
解答题-问答题
|
容易
(0.94)
【推荐2】已知
表示不大于
的最大整数,如
.现给出下列两个命题:
命题
:若
,则
.
命题
:若
,则
.
(1)写出命题
的逆否命题;
(2)判断命题
,
,
的真假,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/541935d30792e2dd762161f1c1574777.png)
命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/583b10b1050c1de417cf05733d9943f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e633261bdb3a711c7c37244360a1cc3d.png)
命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/def239548f628aa0f3fdb08a3a4bfca9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0df5996b04bfc00cb5ba7050f908e47.png)
(1)写出命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
(2)判断命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
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