如图菱形
的顶点
与坐标原点重合,边长为2,一边在
轴的正半轴上,
,则菱形的内切圆方程为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab158dd9e96abcae0f115f54fa66c5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c00e0ca93b81029af5c4cd3bbd0314ce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/196dd1fb-9009-446c-ab5d-b39758f7d16a.png?resizew=160)
21-22高二上·安徽黄山·期中 查看更多[3]
安徽省黄山市屯溪第一中学2021-2022学年高二上学期期中数学试题(已下线)第07讲 圆的一般方程-【暑假自学课】2023年新高二数学暑假精品课(苏教版2019选择性必修第一册)2.5.1 圆的标准方程 (同步练习提高版)
更新时间:2021-12-09 22:50:54
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【推荐1】过
且与两坐标轴都相切的圆的方程为______ .(写出一个即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f9f734c03d04c21edefa08e0acc1fa.png)
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【推荐2】已知平面内点
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42b60aa3fa2f79ae42f2956abd0259f3.png)
,点
满足
.设
到直线
的距离的最大值为
,若数列
的前n项和
恒成立,则实数m能取的最小值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d15ef395621ee1d37495537415ac2287.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83658090d83adaad6610f3908e02477f.png)
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解题方法
【推荐1】关于曲线
,给出下列四个结论:
①曲线
关于原点对称,也关于
轴、
轴对称;
②曲线
围成的面积是
;
③曲线
上任意一点到原点的距离者不大于
;
④曲线
上的点到原点的距离的最小值为1.
其中,所有正确结论的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e84c5e4e64206f45f0c9074248a61c93.png)
①曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
②曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e9192f0db177bed4665b05286e5d18.png)
③曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
④曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
其中,所有正确结论的序号是
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【推荐2】椭圆C:
的上、下顶点分别为A,C,如图,点B在椭圆上,平面四边形ABCD满足
,且
,则该椭圆的短轴长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1b8f2aed1d18d51b58b5e6ad98af2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b6e08fde74010412a6f14ad4dfbcc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aba0f97c5fea9dfab5558dcc37a8b77e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/e55d63c7-41b9-4251-900d-988b9bb1274a.png?resizew=186)
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