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1 . 已知抛物线
,M为直线
上任意一点,过点M作抛物线C的两条切线MA,MB,切点分别为A,B.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
(1)当M的坐标为(0,-1)时,求过M,A,B三点的圆的方程;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
(2)证明:以
为直径的圆恒过点M.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7ad3432ac96b0a38beaa7f2edc3499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42502a5730e1930d77d7100d1e34707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
(1)当M的坐标为(0,-1)时,求过M,A,B三点的圆的方程;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
(2)证明:以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2019-06-04更新
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1247次组卷
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2卷引用:【全国百强校】四川省棠湖中学2019届高三高考适应性考试数学(文)试题