已知全集
,
,集合B是函数
的定义域.
(1)求集合B
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a64dc61989ca50b9ee19d835c4ed268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13346a4d56e6c3da5047e716306c3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca6a364d50ef0a524b7ca113d807ff24.png)
(1)求集合B
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fedf1176ff497d9fa4510e57ba90267a.png)
更新时间:2021-10-12 08:39:43
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【推荐1】已知集合
,B = {x | x2 – 5x < 0},
,全集
R,求:
(1)
;
(2)
.
(3)如果
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f20da1fc6202987e4f5f37a4d35e089.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7353981c4ffd5b1bff0964f5d823173.png)
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(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3433a4f53fac0df6dfd763c4a2b6accf.png)
(3)如果
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名校
【推荐2】设全集
,集合
,集合
.
(1)若
,求
与
;
(2)若“
”是“
”的充分不必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860ebb6f76cd3cb9a265dfc233002a13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93b115ba139ae7981b93a77be31051c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ff2e7f8488ca9602e1dd745c6a8085.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be7026b721caf58b61b1daac10d7db2b.png)
(2)若“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23af61cd402b3789af2401bde9cbefe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐1】已知函数
.
(1)当
时,在平面直角坐标系中画出函数
的图象,并求出函数
在
上的值域;
(2)讨论函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1982786864f37e6f954e8d70f9970620.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/19/e47973b3-b528-4584-b20c-493dfbf64d38.png?resizew=190)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745eb631342dcfee91d7d7e8ccb4375b.png)
(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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解题方法
【推荐2】求下列函数的定义域:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3703fed5efdc24240cdc116e4f592681.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/578a9372ed6c97d6cc6d94a80cbc3fb9.png)
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