名校
1 . 若对圆
上任意一点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
,
的取值与
,
无关,则实数
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e83fc674910fe0cefc70b028b6ece8cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2 . (1)已知直线
,求与直线l平行且到直线l距离为2的直线方程;
(2)若关于x的不等式
的解集是
的子集,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b0ae4d688f297055ccb947022bbdcd6.png)
(2)若关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa81c2bdc9d4dfa3d747fc53e263b1d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ae66c5401deed7341470ca37800463.png)
您最近一年使用:0次
3 . 若不等式
的解集为
,则实数a的取值范围是.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/093c8d15cf1d28cb3b3ce4255c32027d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/398781d58ab4932cd5242c102dbe2ffc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次