已知抛物线
的顶点在原点,焦点在
轴上,且抛物线上有一点
到焦点的距离为5.
(1)求该抛物线
的方程;
(2)已知抛物线上一点
,过点
作抛物线的两条弦
和
,
,判断直线
是否过定点?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57c438531a5c9508d14ef7008eb4e732.png)
(1)求该抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知抛物线上一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/738053bd0217fad1657515ea93464471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e21402367709de8a3cb28d3444d33a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
2018·广西柳州·一模 查看更多[11]
广西柳州市2018届高三毕业班上学期摸底联考数学(文)试题内蒙古赤峰市第二中学2018届高三上学期第三次月考数学(文)试题广西柳州市2018届高三上学期摸底联考数学(文)试题广东省华南师范大学附属中学2018届高三综合测试(三)数学(文)试题(已下线)《2018届优生-百日闯关系列》数学专题三 第三关 以解析几何中与抛物线相关的综合问题2017-2018学年第一学期期末复习备考之精准复习模拟题高三年级(文)人教版数学试题(C卷)(已下线)2017-2018学年度下学期高中期末备考 【浙江版】高二【精准复习模拟题】 基础卷01【教师版】人教A版(2019) 选择性必修第一册 必杀技 第三章 圆锥曲线的方程 专题5 与圆锥曲线有关的范围、最值、定点、定值问题人教B版(2019) 选择性必修第一册 必杀技 第二章 平面解析几何 专题5 与圆锥曲线有关的取值范围(最值)问题、定点与定值问题苏教版(2019) 选修第一册 必杀技 第三章 专题4 与圆锥曲线有关的范围、最值、定点、定值问题北师大版(2019) 选修第一册 必杀技 第二章 4.2 直线与圆锥曲线的综合问题
更新时间:2017-10-27 22:24:32
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适中
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名校
【推荐1】设抛物线
:
,直线
交抛物线
于
两点,且线段
的中点在直线
上.
(1)求抛物线
的方程;
(2)设抛物线
的焦点为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/026808536f6b6d265c778e23836fbf13.png)
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2c62fe38f14f20e968c5b7122552cdc.png)
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【推荐2】已知抛物线
的焦点为
,准线方程是
.
(1)求此抛物线的方程;
(2)过点F斜率为
的直线
与抛物线
交于
,
两点,且
,若O为坐标原点,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
(1)求此抛物线的方程;
(2)过点F斜率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/893d4e8d70ea2c716ac7b6c1777a77f2.png)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c70b3cacdc4a77d86494cba97d4029a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
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解答题-证明题
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【推荐1】已知抛物线的顶点为原点,焦点F在x轴的正半轴,F到直线
的距离为
.点
为此抛物线上的一点,
.直线l与抛物线交于异于N的两点A,B,且
.
(1)求抛物线方程和N点坐标;
(2)求证:直线AB过定点,并求该定点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23fc11a3a7592c68b20f93bdde2ed3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0bac81568b8624599b4b9b39fbae2f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d6c9ca0f54b6a84bb93d435933aae6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715426331815c4e34ad97a8b66ab3ddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97618ba661e223cae2b219835a93847.png)
(1)求抛物线方程和N点坐标;
(2)求证:直线AB过定点,并求该定点坐标.
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适中
(0.65)
【推荐2】已知抛物线
与圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b1cb1359bcb061ce7737fb7e1b34f1.png)
(I)求抛物线
上一点
与圆
上一动点
的距离的最小值;
(II)将圆
向上平移
个单位后能否使圆
在抛物线
内并触及抛物线
(与
相切于顶点)的底部?若能,请求出
的值,若不能,试说明理由;
(III)设点
为
轴上一个动点,过
作抛物线
的两条切线,切点分别为
,求证:直线
过定点,并求出定点坐标.
![](https://img.xkw.com/dksih/QBM/2012/1/12/1570686276968448/1570686282448896/STEM/e91aecbbbf254effa3141e64a5a7bae5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b1cb1359bcb061ce7737fb7e1b34f1.png)
(I)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e5b51a7b0436ea87bfef4c12b66784.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(II)将圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(III)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8649ce18c628d0e03e72cef541f8284f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://img.xkw.com/dksih/QBM/2012/1/12/1570686276968448/1570686282448896/STEM/b5d87849dc7341b9906eafdc02f83b62.png)
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