函数
,若
<2恒成立的充分条件是
,则实数
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a359fa56fb08d642d9486aa06aa40cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abaa8c4140b3cb8a5ca9b918afdb4aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95842ad442c7f6d5ec4b32939b929e63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2018-08-22 15:56:23
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【知识点】 根据充分不必要条件求参数解读
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解题方法
【推荐1】命题
:实数x满足
;命题q:实数x满足
或
.已知p是q的充分不必要条件,则实数a的取值范围是________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/562913baa9c8b74dd47464d3060ccef9.png)
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【推荐2】已知W为不等式组
所表示的平面区域,E为圆
(
)及其内部所表示的平面区域,若“点
”是“
”的充分条件,则区域E的面积的最小值为____________ .
![](https://img.xkw.com/dksih/QBM/2015/5/20/1572113329569792/1572113335230464/STEM/bdede6a795a74267a502e5f0d2c5dc0b.png?resizew=91)
![](https://img.xkw.com/dksih/QBM/2015/5/20/1572113329569792/1572113335230464/STEM/3120f22d18d54d65a839f731e48f5c07.png?resizew=152)
![](https://img.xkw.com/dksih/QBM/2015/5/20/1572113329569792/1572113335230464/STEM/c200bda073c14067b41a65dd8039029f.png?resizew=37)
![](https://img.xkw.com/dksih/QBM/2015/5/20/1572113329569792/1572113335230464/STEM/4f3b075546264027b817c2a096b85427.png?resizew=68)
![](https://img.xkw.com/dksih/QBM/2015/5/20/1572113329569792/1572113335230464/STEM/7c1ed86020ec46e9b2686b5a60128ce1.png?resizew=67)
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