解题方法
1 . 设
,集合
,
,
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934524e431c42cfdd93b73702044e24f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af9527f5f4351e0783939ddaeda85a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf22d7d1a965bda25168a233fb6290c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
2 . 已知集合
,关于x的不等式
的解集为N,若
,则实数c的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39df040f267d84d2937cf97c512b3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d93c4c6289174ef305962d56045fc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2333f966f6ec29f0661f93d99b055cd5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次