解题方法
1 . 已知
,
,
.
(1)若
是
的必要不充分条件,求
的取值范围;
(2)若
是
的必要条件,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f218ded09e90e11571a9ba1791eaeb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82fb110115d5c521deba5cf1f6cc8bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41dca95e8a0f39fb734a9041ea59da44.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2020-11-13更新
|
218次组卷
|
3卷引用:广西贵港市秋季期2020-2021学年高中二年级期中教学质量检测数学试题
2 . 关于
的方程
无实数根的充要条件是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92d51bde7b19966ad1e88c0423e1b100.png)
您最近一年使用:0次
2020-03-15更新
|
275次组卷
|
2卷引用:广西壮族自治区贵港市桂平市2019-2020学年高二上学期期中数学试题