名校
解题方法
1 . 已知集合
,命题
,满足命题p的元素组成集合B.
(1)当
时,求
;
(2)若“
”是“
”的充分条件,求实数a取值的集合.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e034743ddeadcfa6c502f77b12b7b7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94774271e3fa9853b41cfacc78837be8.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
(2)若“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
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20-21高一下·河南·开学考试
名校
解题方法
2 . 已知函数
.
(1)求不等式
的解集;
(2)函数
,若存在
,使得
成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560d40592d78b0c23a7cd28f167a0165.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31b687247b7ca16a7813e3881d18a52.png)
(2)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f884d3de1ee2523d73cf25fca011926.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45745b3b43bcc8c406bac90ce9bcf3d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
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