已知命题
,命题![](https://img.xkw.com/dksih/QBM/2016/2/23/1572492366143488/1572492372353024/STEM/53f6695872f8447bb6526248f404c2dd.png)
,若
是
的充分不必要条件,求实数
的取值范围.
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572492366143488/1572492372353024/STEM/bc0b016324504555b2c8c55669ae430d.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572492366143488/1572492372353024/STEM/53f6695872f8447bb6526248f404c2dd.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572492366143488/1572492372353024/STEM/982972773c1a45c4914903512de092de.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572492366143488/1572492372353024/STEM/087353516cce450c903710b66ffec334.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572492366143488/1572492372353024/STEM/32c915e089b346b8b245e8dfe464688e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2016-12-04 02:26:49
|
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解答题-问答题
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容易
(0.94)
解题方法
【推荐1】已知集合
,
.
(1)用区间表示集合P;
(2)是否存在实数m,使得
是
的______条件.若存在实数m,求出m的取值范围:若不存在,请说明理由.
请从如下三个条件选择一个条件补充到上面的横线上:
①充分不必要;②必要不充分;③充要.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a6f2bf3751a49956c87b95264bd316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94b6de227a73749ad7131a6f4f226fd9.png)
(1)用区间表示集合P;
(2)是否存在实数m,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/320a7c616f6f7207a0a38bb707ac2205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8647b00cc8c8f35555c7d78cf2812c.png)
请从如下三个条件选择一个条件补充到上面的横线上:
①充分不必要;②必要不充分;③充要.
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名校
解题方法
【推荐2】已知集合
,
.
(1)当
时,求集合
;
(2)若
,“
”是“
”的充分条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f7d2e7d3563012320842a4ee298a9a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b413c01564d37f8be5dda1f40623a409.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3967d620e2fef3ecc724c66e29f68a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29616621038fbfe4bcd48943d98f783d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/220bd51b6ad1b4e024a2531100b082c1.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
解答题-问答题
|
容易
(0.94)
名校
【推荐1】已知命题
实数
满足不等式
,命题
实数
满足不等式
.
(1)当
时,命题
,
均为真命题,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/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb4c64dbe7603a0678b28c979f548713.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f88ff53e42090c2a72a5a8c6bdaddbe6.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次