名校
解题方法
1 . 已知圆C的圆心为直线
与x轴的交点,半径等于直线
与直线
的距离.
(1)若直线
与圆C交于A.B两点,求
;
(2)过点
作圆的切线交x轴与y轴分别于点C.D,若O为坐标原点,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e66184e7f5ef2a46801c4a57d3fb441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a6b676fc870f63c2431b66de9762af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3f999bcdcdc1b9d56e0639cadd96dbd.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d585d2d6643471640905d234d9538c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316697f98db75425d75df828fe1b4ba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f4ce8808384417be24e85762222769.png)
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2021-02-05更新
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230次组卷
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3卷引用:重庆市九龙坡区2020-2021学年高二上学期期末数学试题