已知集合
,
.
(1)当
时,求
;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33a04106bf974dce567b816c2cdcebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef2e42c836486d7eb80a538a461ba9ad.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdbbe46a98a8fdebfc46fcbc45dc88e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2022-12-29 07:58:00
|
相似题推荐
解答题-问答题
|
较易
(0.85)
名校
【推荐1】已知全集
,集合
为偶数},集合
.
(1)求
;
,
;
(2)写出集合
的所有子集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df3bad38d0de822e8d451e1c2709825c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd17a84508bdb11bc0732fcacc1c909b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f17f09f9c8955ab8154df06457ac9e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fa17bc7c6526a5b6319878228955925.png)
(2)写出集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
解题方法
【推荐2】已知集合
或
,集合
.
(1)若
,求
,
;
(2)若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c996b90b721b42829226819409d9d01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5fb3d491a81b148f8988f9d04c4a13e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5ef23be453c7e2d61ca4785677b700.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c994bfda687df7e31b1f252a5581df47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12287f3eec23b7a8b1448ecca78cbf15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3845f266f2826ada0b825caba49c64b5.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
解题方法
【推荐1】(1)已知
,求
的值;
(2)已知集合
,是否存在实数
,使得
?若存在,试求出实数
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02971a40b9bdcdb6e392ef653b8d398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e3e9d79d9086317b645e28394cb7d2.png)
(2)已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dcd62120dafe950b1880f2e5096a631.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdbbe46a98a8fdebfc46fcbc45dc88e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
【推荐2】设集合
,
.
(1)
,求
;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c7b4c8d3890905b93f13801ebc9d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c5306dfade1970186132816e6a7cfe.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a3cc8c48bf54ec8252e5dce6867754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9ee4df3cd0c5982eec8be19e136130.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dca26fbaceab868477712a4e0f07ee77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
解题方法
【推荐2】用清水洗衣服,若每次能洗去污垢的
,若要使存留的污垢不超过1%,则至少要洗多少次?(参考数据:lg2≈0.3010)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
您最近一年使用:0次