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1 . 在极坐标系中,圆
的极坐标方程为
,圆
的极坐标方程为
,直线l的极坐标方程为
,其中
满足
,若圆
,
的公共点都在直线l上.
(1)求正数a的值;
(2)记圆
的圆心为M,求点M与圆
,
的公共点构成的三角形的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd84fa50da9c17be8df3a4b06ab67392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdebedd02b4ea57f8562443742086d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e8cfb2bc34c87e56be569a8128e9cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c7d6627a568c6eaae35260d53dfb29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029505c1ac8284ef505f9618c85656ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(1)求正数a的值;
(2)记圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
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2022-08-14更新
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4卷引用:青海省西宁市大通回族土族自治县20221-2022学年高三开学摸底考试数学(理)试题