1 . 已知
是
的充分条件,而
是
的必要条件,同时又是
的充分条件,
是
的必要条件.试判断:
(1)
是
的什么条件?
(2)
是
的什么条件?
(3)其中有哪几对条件互为充要条件?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e434d52b7741e42c21c2785eb07ffcaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3480c78b5e4f9d967837d481932363bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3480c78b5e4f9d967837d481932363bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89bdf1717c68cfc8a306ee79757e7e21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d44c1bd02fe5c8b5feced1d054fa1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89bdf1717c68cfc8a306ee79757e7e21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d44c1bd02fe5c8b5feced1d054fa1d.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d44c1bd02fe5c8b5feced1d054fa1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e434d52b7741e42c21c2785eb07ffcaf.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e434d52b7741e42c21c2785eb07ffcaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89bdf1717c68cfc8a306ee79757e7e21.png)
(3)其中有哪几对条件互为充要条件?
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2022-10-20更新
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3卷引用:陕西省西安南开高级中学2022-2023学年高一上学期9月月考数学试题