1 . 已知命题
,命题
,且A是B的充分条件,则a的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec7634fb6231da4d044e4ecbfc6ca93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eaedb747ce82e9d2e2b0ab0049e7462.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2 . 设
,
,若“
”是“
”的充分非必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25472f7cbe74bfd0b5149f0983716edb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00f7fea510606f98d44b1d7bf32adf5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23af61cd402b3789af2401bde9cbefe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
3 . 已知
,
,且
是
的必要非充分条件.求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b198dca095e304f1b265ec185a2598d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/604c031f9bbb81e90e95e4e1fbbb9bf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
4 . 已知
,
,若
是
的充分非必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa5db64d9813e21937f4027cc336d64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/084dd0f8adbd8ee10126742a70d01b73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次