11-12高二上·广东揭阳·阶段练习
名校
1 . ①一个命题的逆命题为真,它的否命题一定也为真:
②在
中,“
”是“
三个角成等差数列”的充要条件;
③
是
的充要条件;
④“
”是“
”的充分必要条件;
以上说法中,判断错误的有_______________ .
②在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32436704a722d5e568ff5c175bf3c662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c1e84aaa7e1b5c1283075b36c72fb5.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/403b18b04a7de9e79384b602834d3faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e59402e777165471831d1b6d458584a1.png)
④“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91bcddc2ece6bcde9355e222e1cf9f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
以上说法中,判断错误的有
您最近一年使用:0次
2018-01-07更新
|
591次组卷
|
4卷引用:福建省福州福清市2017-2018学年学年高二上学期期末考试数学(理)试题
福建省福州福清市2017-2018学年学年高二上学期期末考试数学(理)试题(已下线)2011-2012年广东省揭阳一中高二上学期第二阶段理科数学天津市蓟州区第一中学2017-2018学年度高二第一学期第二次月考数学(理)试题新疆伊西哈拉镇中学2018-2019学年高二上学期期末数学试卷
2 . 下列说法中
①命题“已知
,若
,则
或
”是真命题;
②命题“若
,则
”的否命题为“若
,则
”;
③若
,则
;
④命题“
”的否定为“
”.
正确说法的序号是___________ .
①命题“已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcbca3478eae63853d2aab5332e2e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a34982de5d3f287cd570ea30eb46d185.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d09b9fc9719ff6faf32254b9d48713.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be861d83cddb5fc8aa22f7f0f9415d6.png)
②命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1c561b81538ea38deab13478911b89.png)
④命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d2292108bfdd8c5e83be13e85d4d057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24044551b3704214531eb0fb1ba41ce1.png)
正确说法的序号是
您最近一年使用:0次
2018-01-22更新
|
401次组卷
|
3卷引用:福建省闽侯第六中学2017-2018学年高二上学期期末考试数学(文)试题
3 . 说法正确的是____________ .(写出所有正确说法的序号)
①若
是
的充分不必要条件,则
是
的必要不充分条件;
②命题“
”的否定是“
”;
③设
,命题“若
,则
”的否命题是真命题;
④若
,则
.
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e26b38e357c7d985656ba7bb3c794a5.png)
②命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41051fd407e9953c2f7bdefcd2963a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d0a1ef04f2c0fbe329a3796caac0365.png)
③设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcbca3478eae63853d2aab5332e2e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34715101c66fa12ce6baf0a9c53f1672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c988d709ba8cd8aed6cb83d76c0ba89c.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932844e871042638e2763c45e38f7a68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ae725178f59152d3a81deae68fbaf8.png)
您最近一年使用:0次