已知抛物线C的顶点是双曲线
的中心,而焦点是双曲线的右顶点
(1)求抛物线C的方程;
(2)若直线
与抛物线相交于A、B两点,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f11a4314f30e0a5a7cfb2e290751fec.png)
(1)求抛物线C的方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33400b08941f4f9c0ed12b0e0cdff822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
更新时间:2020-03-25 23:29:10
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【推荐1】已知双曲线.
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/711b21672fd907c5c92fee1d649e7003.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)若双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f0b2e46ce5d0706160c2ba6a11c8c97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】求下列各曲线的标准方程
(1)实轴长为
,离心率为
,焦点在
轴上的椭圆;
(2)抛物线的焦点是双曲线
的左顶点.
(1)实轴长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)抛物线的焦点是双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6aeaa05d6032fb4aebbeefdc2e5022.png)
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【推荐1】已知抛物线
关于
轴对称,顶点在坐标原点
,直线
经过抛物线
的焦点.
(1)求抛物线
的标准方程;
(2)若抛物线
的焦点是对称轴为坐标轴的双曲线
的一个焦点,并且双曲线
的离心率为2,求双曲线
的标准方程.
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7690f62e0b3a59c3ff0c31fe4033de1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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【推荐2】求适合下列条件的抛物线的标准方程:
(1)焦点为
;
(2)准线方程是
;
(3)焦点到准线的距离为3;
(4)经过点
.
(1)焦点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe89fa23789b97f89c3d8153b83fa06b.png)
(2)准线方程是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6a27a9d5d345f1e04020bfea2770ac.png)
(3)焦点到准线的距离为3;
(4)经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85d2b98914e5b801951edca948e5770f.png)
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【推荐1】如图,线段AB过x轴正半轴上一定点
,端点A,B到x轴距离之积为2m,以x轴为对称轴,过A,O,B三点作抛物线.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/766165b6-48a5-41d6-9172-dcaa206ab736.png?resizew=146)
(1)求抛物线方程;
(2)若
,求m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62769b7177ef4bc952dc1dd51d6b510.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/766165b6-48a5-41d6-9172-dcaa206ab736.png?resizew=146)
(1)求抛物线方程;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a40c4959cf0ef51fbedc669fdc6a05.png)
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【推荐2】已知抛物线的方程为
,直线l过定点
,斜率为k.当k为何值时,直线l与抛物线有一个公共点,有两个公共点,没有公共点?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4065ed9c98391f4cfe89319b6e65b44f.png)
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