设集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/994c5bfd8cc0ea2a34e3658808f8c833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96c0ec67a2d262215d68ffbd181c3c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e60375f97ff7854f4d3a8b1108d2e3.png)
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更新时间:2023-11-29 19:12:32
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解题方法
【推荐1】已知集合
,
,则下列关系中,正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b01d36739db17960c7c5cb0c34a1cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5dcc29d65b5b6f5ae29de3fcae9bc68.png)
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【推荐2】对于非空集合
定义运算:
.已知
,
,其中
满足
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a592c15cab908939c824daaeb044f597.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831d7d5322d5bbb993496fc1f675efd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f1d3bb4fc06393d79888f12aceaf602.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d10449bc77d692a7270e0f20a68cdf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eeda5cef4846ef829069fe27f64e34e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1ba4f58de9a90c3bd2599bb185e61f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6dbfae11a4ec6fb0ef107173b2ccce2.png)
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【推荐2】在如图所示的锐角三角形空地中,欲建一个面积不小于400m2的内接矩形花园(阴影部分),则其边长
(单位:m )的取值范围是( )
![](https://img.xkw.com/dksih/QBM/2017/11/10/1814277636349952/1815151273492480/STEM/6d5c507803684d4e931bdccaad8f0613.png?resizew=207)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2017/11/10/1814277636349952/1815151273492480/STEM/6d5c507803684d4e931bdccaad8f0613.png?resizew=207)
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