名校
1 . 若
成立的充分非必要条件是
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a7aeccaa170033fbd925e168ef13e13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afeccf0358c02b53554a0f6d3dc33cbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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2 . 函数
,x∈[﹣1,+∞)是增函数的一个充分非必要条件是
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560047726592/1572560053723136/STEM/db643cf8f53945b18ceb1f29fef06cdb.png)
A.a<1且b>3 |
B.a>﹣1且b>1 |
C.a>1且b>﹣1 |
D.a<﹣2且b<2 |
您最近一年使用:0次
3 . 已知
,
,若
是
的充分非必要条件,则实数
的取值范围是
![](https://img.xkw.com/dksih/QBM/2015/5/18/1572112270327808/1572112276086784/STEM/0a880fa6839d4899b86781cc1caa7108.png)
![](https://img.xkw.com/dksih/QBM/2015/5/18/1572112270327808/1572112276086784/STEM/d950d7188202427abfb0593ca34e213f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d1a34ae2b8c77f8d7e355c6d1d667e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74c62c14a017007a6bdfe25eada9c433.png)
![](https://img.xkw.com/dksih/QBM/2015/5/18/1572112270327808/1572112276086784/STEM/81448f146905463f985c52263406c3da.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2014·上海松江·三模
4 . 已知
,
.若
是
的充分非必要条件,则实数
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f17e6fe0bb782c19008b29bc9e7ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ded48c536b21199ff18870951ff8e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d1a34ae2b8c77f8d7e355c6d1d667e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74c62c14a017007a6bdfe25eada9c433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次