名校
解题方法
1 . 已知
,设
,则
是
的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24d86a3db5d8b27f6084e2cfcb33e71b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9cfc36eaabc1f0efd99f0ec0e70d37c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
名校
2 . 已知集合
,函数
的定义域为集合
.
(1)若
,求集合
;
(2)已知
且“
”是“
”的必要不充分条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1364fa049475c3400ca4433568ae00d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c5e5da021925fd87d7af7bbaa7897f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ba8578787a6b9068b5957d40e8925d9.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df7b5582e1931243dbb90b7591137f23.png)
![](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)
您最近一年使用:0次