已知两圆
和
.
(1)当
取何值时,两圆相交;
(2)求
时,求两圆的公共弦所在直线的方程和公共弦的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e25b317906ca42ab1c73779cb462ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/117117bbb2e05f7087ce4b6a9424ec1c.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
更新时间:2021-11-06 10:30:19
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解答题-问答题
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适中
(0.65)
【推荐1】已知动圆与圆
外切,同时与圆
内切.
(1)求动圆圆心
的轨迹
的方程,并说明它是什么曲线;
(2)若直线
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4672ab4fd26654fc1ebb1249cd6241e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/083a7f60f812203cd2d9bb351782ecbe.png)
(1)求动圆圆心
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edabb588d8979ca8f6156022bb76539c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
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您最近一年使用:0次
【推荐1】已知圆
:
,直线
:
.
(1)若直线
被圆
截得的弦长为
,求实数
的值;
(2)当
时,由直线
上的动点
引圆
的两条切线,若切点分别为
,
,则在直线
上是否存在一个定点?若存在,求出该定点的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/960f044dbaf554a3b6820acc11467a1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b284c13c0fbd42803eb8baf0667ef609.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60cbb271baca5cd015f30e07d9eebfd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2a51944c720568f35d443589dfc1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解答题-问答题
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适中
(0.65)
名校
【推荐2】已知P为直线
上一动点,过点P向圆
作两切线,切点分别为A、B.
(1)求四边形
面积的最小值及此时点P的坐标;
(2)直线AB是否过定点?若是,请求出该点坐标;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061af1c7a4480004221e253d813efe07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5baa05a2e645d661508642375e3cf3a5.png)
(1)求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcc1a89a6a4e99d65b83b4e3ab3ed4eb.png)
(2)直线AB是否过定点?若是,请求出该点坐标;若不是,请说明理由.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】已知圆
,圆
.
(1)试判断两圆的位置关系;
(2)求公共弦所在直线的方程;
(3)求公共弦的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c55b1e281adac7af6a277d6dc2f1654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f32e0f382bb2de22e37b45ff9126410c.png)
(1)试判断两圆的位置关系;
(2)求公共弦所在直线的方程;
(3)求公共弦的长度.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】在直角坐标系
中,圆
的参数方程是
(
为参数,
)以坐标原点为极点,
轴正半轴为极轴建立极坐标系,半径为
的圆
的圆心的极坐标为
.
(1)求圆
的极坐标方程;
(2)圆
与圆
交于
两点,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faa53b42dbc4b8d62a8a0a392ad45275.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94869ae8f4e594e8a38a5549006f444d.png)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(2)圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次