1 . 已知直线
:
,圆
:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10103248277cc0ef4ae2136b07a4ebc6.png)
(1)求证:直线
与圆
总相交;
(2)求出相交的弦长的最小值及相应的
值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d54796a5035dde3723b600bab78563a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10103248277cc0ef4ae2136b07a4ebc6.png)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求出相交的弦长的最小值及相应的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2018-01-27更新
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3卷引用:黑龙江省鹤岗市第一中学2019-2020学年高二9月月考数学(文)试题