设集合
,
,则
的子集的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cb79b51d24899300224924ecb2ad6a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2003909b7941b97af390634e7c7725a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
A.4 | B.3 | C.2 | D.1 |
更新时间:2020-03-18 02:08:52
|
相似题推荐
单选题
|
适中
(0.65)
名校
【推荐1】已知集合A={x∈N|x2+2x﹣3≤0},则集合A的真子集个数为 ( )
A.3 | B.4 | C.31 | D.32 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】非空集合P满足下列两个条件:(1)
,(2)若元素
,则
,则集合P个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b07a67307d5d4627efa688b30e5573.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0f823a4c1a9e082b4dd9a89ce823c9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f5a97f6a81bcd2e53f00133ff1876.png)
A.4 | B.5 | C.6 | D.7 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】已知
为椭圆
上一点,
、
为该椭圆的两个焦点,若
,则
( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d124b231bf2cd3746f35e6c68cd7178f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68150ca30ba751f87cec765a6ac56d8a.png)
A.![]() | B.3 | C.6 | D.2 |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】若椭圆
(
)与双曲线
(
)有共同的焦点
,
,P是两曲线的一个交点,则
的面积是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfda0696f276fff4177533f8c63e349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e34f42b3be15518c29e3689c9fe6d6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbad79e327f83fac8071d28709a5c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002ed1ebb2cb936e10ab478789f91c7c.png)
A.3 | B.1 | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐1】设集合
,
,则
的子集个数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50b256c93143faf91a84b685643f9a58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa9f9fb15565472645a41817f5de1ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9682ecfd0d8b9b413e2b5b4b1e7d5f79.png)
A.4 | B.8 | C.16 | D.32 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】已知集合
,
,则
中有几个元素( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b2e179c667834ffcc92d0ff37411c8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ebe1b9642549ea2db9867ebe995c8c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次