若抛物线
上存在关于直线
对称的两点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e98f7e17f36fc8f955290ffdb0a75b73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
2021高三·上海·专题练习 查看更多[1]
(已下线)重难点07 直线与圆锥曲线(点差法与交轨法)-2021年高考数学【热点·重点·难点】专练(上海专用)
更新时间:2021-01-17 18:36:37
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相似题推荐
【推荐1】已知抛物线
:
的焦点为
,过点
且垂直于
轴的直线交抛物线于
两点,
.
(1)求抛物线
的方程;
(2)若
,
是抛物线
上两动点,以
为直径的圆经过点
,点
,
,
三点都不重合,求
的最小值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57dfc9d1109fe41145cc892b5702d9fb.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530e5817131adf2c05b99ff18eb9060f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd3adfb8ef95245d7d073de76ceb053a.png)
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【推荐2】已知抛物线
的焦点为F,点M是抛物线的准线
上的动点.
![](https://img.xkw.com/dksih/QBM/2022/5/22/2984742987235328/2984796228083712/STEM/a08233a9-3e57-413c-9d81-f0baa02c2a4a.png?resizew=139)
(1)求p的值和抛物线的焦点坐标;
(2)设直线l与抛物线相交于A、B两点,且
,求直线l在x轴上截距b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://img.xkw.com/dksih/QBM/2022/5/22/2984742987235328/2984796228083712/STEM/a08233a9-3e57-413c-9d81-f0baa02c2a4a.png?resizew=139)
(1)求p的值和抛物线的焦点坐标;
(2)设直线l与抛物线相交于A、B两点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82bf519dea387e976b316b94784af83f.png)
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【推荐1】已知圆
,动点
,线段
与圆
交于点
,
轴,垂足为
,
,设动点
形成的轨迹为曲线
.
(Ⅰ)求曲线
的轨迹方程,并证明斜率为
的一组平行直线与曲线
相交形成的弦的中点在一条直线上;
(Ⅱ)曲线
上存在关于直线
对称的相异两点
和
,求线段
的中点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69bd440c2e5744dcb586fc57f479d4a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa080648224385147faca0e4a0aace8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ee3fe7858958eda7fe9b9b0be4d1c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49a55f36b937523501a743a2d6028585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅰ)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27387a9cd3d7bc5dbbaab24646fdef14.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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解题方法
【推荐2】过点Q(4,1)作抛物线y2=8x的弦AB,恰被点Q所平分,求AB所在直线的方程.
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