1 . 命题“数列
前
项和是
的形式,则数列
为等差数列”的逆命题,否命题,逆否命题这三个命题中,真命题的个数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708fc2d77d447baf795983da99effe53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2 . 设定点
,动点
满足条件
(其中常数
),则点
的轨迹是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b204d263c0711ff67b0dcdf095fe0f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2016/11/30/1573188299014144/1573188304920576/STEM/b08f5940b81e4af4b4eecffe5fd9a8e9.png)
![](https://img.xkw.com/dksih/QBM/2016/11/30/1573188299014144/1573188304920576/STEM/22bf55ab14994151ad308aa2263834d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
A.椭圆 | B.线段 |
C.不存在 | D.椭圆或线段 |
您最近一年使用:0次
3 . 已知命题
:“
,
”,则
是
![](https://img.xkw.com/dksih/QBM/2016/11/30/1573188421222400/1573188427046912/STEM/8f9707fd352145ac8a274bfcb14578c3.png)
![](https://img.xkw.com/dksih/QBM/2016/11/30/1573188421222400/1573188427046912/STEM/314bf442567b4be69a7e8a86c9c1c09a.png)
![](https://img.xkw.com/dksih/QBM/2016/11/30/1573188421222400/1573188427046912/STEM/fa5581ed87e7431485a89c504485d36e.png)
![](https://img.xkw.com/dksih/QBM/2016/11/30/1573188421222400/1573188427046912/STEM/ad3df07686a749538f6be752b774db74.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
2016-11-28更新
|
597次组卷
|
2卷引用:2016-2017学年辽宁大连二十高级中高二上期中数学(理)试卷
4 . 命题“数列
前
项和是
的形式,则数列
为等差数列”的逆命题,否命题,逆否命题这三个命题中,真命题的个数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a3250c1ce52b36c7a1e0a3e93432e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
5 . 抛物线
的焦点坐标为
![](https://img.xkw.com/dksih/QBM/2015/12/15/1572365681090560/1572365686898688/STEM/db68521c494749f5b0ea403e25cfc172.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
6 . 椭圆
的短轴长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef03397df9a6d25f459bc6f5d26d337f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2015-12-15更新
|
308次组卷
|
3卷引用:2015-2016学年辽宁省大连市第二十高级中学高二上期中理科数学试卷