名校
解题方法
1 . 下列命题中正确的个数是( )
①命题“
”的否定是“
”
②函数
的零点所在区间是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/189bd412d04a193db3f17660200bc547.png)
③若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d006e0ccbd835b9fec381b7ea37e71f8.png)
④命题
,命题
,命题
是命题
的充要条件
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cedd16620cee5d18ca698018e31c3aad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8f5c0add762da69eb627221fffb7280.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3b850f33b7b169e3b757fdea4f05eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/189bd412d04a193db3f17660200bc547.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aeee668f80fa1e23c4e0c100ea9b939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d006e0ccbd835b9fec381b7ea37e71f8.png)
④命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/747ec1055b6e5a4edc7fd3e5af5a9617.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a36bb08df4781ad30e45bc1e4a4eb6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e434d52b7741e42c21c2785eb07ffcaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89bdf1717c68cfc8a306ee79757e7e21.png)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
2022-10-24更新
|
456次组卷
|
3卷引用:天津市新四区示范校2019-2020学年高一上学期期末联考数学试题
名校
解题方法
2 . 已知
,
,
.
(1)若命题
为真命题,求实数
的取值范围;
(2)若
是
的充分不必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51bda25ca665ab3ba8b630162bb50c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f95a98e5d53508d166af88d4510bff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/720a74de9582471920fc0157c1509c1f.png)
(1)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2022-10-12更新
|
171次组卷
|
6卷引用:河南省豫西名校2020-2021学年高二上学期第二次联考数学(文)试题