如图,在平面直角坐标系
中,A,B是圆O:
与x轴的两个交点(点B在点A右侧),点
,x轴上方的动点P使直线
,
,
的斜率存在且依次成等差数列.
![](https://img.xkw.com/dksih/QBM/2020/2/27/2408261106483200/2408810838794240/STEM/6684f811-efdc-4999-9684-68edddc6c4e0.png)
(1)求证:动点P的横坐标为定值;
(2)设直线
,
与圆O的另一个交点分别为S,T.求证:点Q,S,T三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23728b4c0467a27d90f71b424f6a946.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/2020/2/27/2408261106483200/2408810838794240/STEM/6684f811-efdc-4999-9684-68edddc6c4e0.png)
(1)求证:动点P的横坐标为定值;
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
17-18高一下·江苏南通·阶段练习 查看更多[2]
更新时间:2020-02-28 16:41:06
|
相似题推荐
【推荐1】已知点
,点P在直线
上运动,请点Q满足
,记点Q的为曲线C.
(1)求曲线C的方程;
(2)设
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.
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(1)求曲线C的方程;
(2)设
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【推荐2】已知抛物线
的焦点为F,直线l交抛物线于不同的A、B两点.
(1)若直线l的方程为
,求线段AB的长;
(2)若直线l经过点P(-1,0),点A关于x轴的对称点为A',求证:A'、F、B三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
(1)若直线l的方程为
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(2)若直线l经过点P(-1,0),点A关于x轴的对称点为A',求证:A'、F、B三点共线.
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适中
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解题方法
【推荐1】已知圆
.
(1)若圆C被直线
截得的弦长为8,求圆C的直径;
(2)已知圆C过定点P,且直线
与圆C交于A,B两点,若
,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2165b5ad20619d838f204f200801e22b.png)
(1)若圆C被直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/874188b1ad1af65fe2951e3a0c1c0e84.png)
(2)已知圆C过定点P,且直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9378192d39a3089b92ea7cc8a44c667a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a3af6175f323f7e1bfee6609cb8513.png)
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解题方法
【推荐2】在平面直角坐标系
中,直线
的参数方程为
为参数
以坐标原点
为极点,
轴正半轴为极轴建立极坐标系,曲线
的极坐标方程为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1c87995844b9fa2f8dae89dcd99890.png)
(1)求直线
和曲线
交点的直角坐标;
(2)设点
的极坐标为
,点
是曲线
上的点,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913b7537e011acfeec11952731351388.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1c87995844b9fa2f8dae89dcd99890.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92daa4c02568ba462e2ca35888d78d18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
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【推荐3】在直角坐标系
中,直线
的参数方程为:
(
为参数),以坐标原点
为极点,以
轴正半轴为极轴建立极坐标系,曲线
的极坐标方程为
,直线
与曲线
交于
,
两点.
(1)求直线
的普通方程和曲线
的直角坐标方程;
(2)若点
的极坐标为
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a159de0b2d9eb1ae0b7e664e64d3c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421b8aa7a5e9e60799bd31b186b566f2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9dcf6c319174c9ea2b1ceaed1649a.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a159de0b2d9eb1ae0b7e664e64d3c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc5c19ac440746be97d8b46af5d288a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd0046231b4f42e979e4fc9148fb41f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51bcb6c4eadda3f3c9c617ff4e876826.png)
您最近一年使用:0次
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(0.65)
名校
【推荐1】在平面直角坐标系中,已知动点P与两个定点
的距离之比为
,记动点P的运动轨迹为曲线C.
(1)求曲线C的方程;
(2)设过点
的直线l交曲线C于A,B两点,问在x轴上是否存在定点M,使得x轴平分
?若存在,请求出点M的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc52a2237cb3881ba65b18edaa0010e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求曲线C的方程;
(2)设过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/813597f052c8930e12f0a22aeaa3cce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f9c3b578fc0598d5ec6c79404c6cc2.png)
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解答题-证明题
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适中
(0.65)
【推荐2】已知A(﹣1,0),B(1,0),动点G满足GA⊥GB,记动点G的轨迹为曲线C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/d38345d4-aeb2-4199-afa9-6c7248f2891a.png?resizew=154)
(1)求曲线C的方程;
(2)如图,点M是C上任意一点,过点(3,0)且与x轴垂直的直线为l,直线AM与l相交于点E,直线BM与l相交于点F,求证:以EF为直径的圆与x轴交于定点T,并求出点T的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/d38345d4-aeb2-4199-afa9-6c7248f2891a.png?resizew=154)
(1)求曲线C的方程;
(2)如图,点M是C上任意一点,过点(3,0)且与x轴垂直的直线为l,直线AM与l相交于点E,直线BM与l相交于点F,求证:以EF为直径的圆与x轴交于定点T,并求出点T的坐标.
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