解题方法
1 . 已知集合
,
,若
,则实数
的取值范围是
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572389638201344/1572389643935744/STEM/7b748cdbc6804cef8521a27fa9321588.png)
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572389638201344/1572389643935744/STEM/58ac106655444f44983df3b422462012.png)
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572389638201344/1572389643935744/STEM/e6c0ea1ef9a94323a384583252aba779.png)
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572389638201344/1572389643935744/STEM/d0ba9b9ca9374d349dd395f38b8a2c69.png)
A.[2,+∞) | B.(2,+∞) | C.(-∞,0) | D.(-∞,0] |
您最近一年使用:0次
2 . 下列关系中,正确的个数为( )
①
②
③
④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb8ef44eea6657a0371158bc664da5a.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f38a1799a5aa1c8410281ae8e461d60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdedf6722600ea3a5df49f2bbc9fb155.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ad45790aafda0d48cd44b19f54d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb8ef44eea6657a0371158bc664da5a.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
13-14高三上·河北唐山·期中
解题方法
3 . 设
,
,若
,则实数a的取值范围是
![](https://img.xkw.com/dksih/QBM/2013/11/28/1571414396215296/1571414400991232/STEM/149fc86d48fb46f3991148c29d908ed8.png)
![](https://img.xkw.com/dksih/QBM/2013/11/28/1571414396215296/1571414400991232/STEM/620608c56418405abde56cac25944597.png)
![](https://img.xkw.com/dksih/QBM/2013/11/28/1571414396215296/1571414400991232/STEM/3de3134a7d3a42dfb35448ffcd26be7d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2012·河北衡水·一模
解题方法
4 . 设集合
,则“
”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4abf76d7d70a31857981a4cb7d2f06b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fadd2e6f0aa16c2c466c904474ffc79c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c66ed141c1c3947bbf935812c7e440be.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
名校
5 . 已知A={x|x≥k},B={x|
<1},若A⊆B,则实数k的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98efc18ba76bfa079b1a4bbbbdb18661.png)
A.(1,+∞) | B.(﹣∞,﹣1) | C.(2,+∞) | D.[2,+∞) |
您最近一年使用:0次
2015-06-29更新
|
523次组卷
|
2卷引用:河北省枣强中学2017-2018学年高一上学期第一次月考数学试题