1 . 已知集合A为 函数
的定义域,
集合
.
(1)若
,求a的值;
(2)求证:
是
的充分不必要条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05cda5b53647a8d7e4ac31ad2f45b169.png)
集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f12984d777021761b6a4d25a4f5dc44.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0584ed68a578ed4bc1871e5e80c82c3f.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0029a98741d5cd83a654240c3e5ad414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1be998a38602f0ae3e966868a28e9e0.png)
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2016-12-03更新
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2卷引用:2016届河北省定州中学高三第一次月考理科数学试卷