动圆M与圆
外切,且与直线
相切.
(1)求动圆M圆心的轨迹
的方程.
(2)已知斜率为-1的直线l交曲线
于A,B两个不同的点,定点
.求证:直线PA,PB与x轴总围成等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f11583d5a9d06b238a94e3f24c8aa41b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
(1)求动圆M圆心的轨迹
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
(2)已知斜率为-1的直线l交曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497911bc462170183e81d95bd509b70b.png)
21-22高二·全国·课后作业 查看更多[2]
2023版 苏教版(2019) 选修第一册 突围者 第3章 第三节 课时1 抛物线的标准方程(已下线)突破3.3 抛物线(重难点突破)-【新教材优创】突破满分数学之2022-2023学年高二数学重难点突破+课时训练 (人教A版2019选择性必修第一册)
更新时间:2022-08-24 14:28:16
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【推荐1】已知动点
到点
(
为常数且
)的距离与到直线
的距离相等,且点
在动点
的轨迹上.
(1)求动点
的轨迹
的方程,并求t的值;
(2)在(1)的条件下,已知直线与轨迹
交于
两点,点
是线段
的中点,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff11b7467b539aa68d955c4344433c91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2c46f50628332b4995b2435ef0e181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d0924ff22fff9f5639feb0ceeece80d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)在(1)的条件下,已知直线与轨迹
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85d23fc512ad69a2d5919ce690407704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐2】已知y轴右侧的曲线C上任一点到
的距离减去它到y轴的距离的差都是1.
(1)求曲线C的方程;
(2)过点F且斜率为k的直线l与C交于A,B两点,线段AB的中点为M,直线n是线段
的垂直平分线且与x轴交于点T,试问
的值是否为定值?若是,求出该定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092fd1b1d33979818300cd2e3699bff7.png)
(1)求曲线C的方程;
(2)过点F且斜率为k的直线l与C交于A,B两点,线段AB的中点为M,直线n是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c367b2d4b253135a9eb24d9bcf8bd4.png)
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【推荐1】设
、
为抛物线
上两点,且线段
的中点在直线
上.
(1)求直线
的斜率;
(2)设直线
与抛物线交于点
,记直线
、
的斜率分别为
、
,当直线
经过抛物线的焦点
时,求
的值.
![](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/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107babba45f110012183dc4dc54490f7.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107babba45f110012183dc4dc54490f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69e3f7ddd51215d00661c09cd900d60.png)
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【推荐2】如图,已知点
,点
分别在
轴和
轴上运动,并满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/88fd203d-a6c3-44da-8eba-b5e29ae553c2.png?resizew=223)
(1)求动点
的轨迹方程;
(2)若过点
的直线与点
的轨迹交于
两点,
,求直线
的斜率之和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a525534689bd2701205d4ab17574c39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3961c815bb94734b7c88045cc5c6ef5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/88fd203d-a6c3-44da-8eba-b5e29ae553c2.png?resizew=223)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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