已知集合
,
且
.
(1)若
是
的充分条件,求实数a的取值范围;
(2)若命题“
”为假命题,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6525ca8e81bd3d78b1b86a6abe193df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa2d38c6e81f810d61eeb2af2bf3763.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39e1a98ab2966ec0bc18e74d17b1ff4.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23af61cd402b3789af2401bde9cbefe.png)
(2)若命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96f1ba0a1129741502600e47bf058c98.png)
更新时间:2020-02-18 10:38:32
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