双曲线
中心在原点,离心率为
,若它的一个顶点恰好是抛物线
的焦点,则
的虚轴长等于________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
更新时间:2022-04-03 21:16:31
|
相似题推荐
填空题-双空题
|
较易
(0.85)
【推荐1】石城永宁桥,省级文物保护单位,位于江西省赣州市石城县高田镇.永宁桥建筑风格独特,是一座楼阁式抛物线形石拱桥.当石拱桥拱顶离水面
时,水面宽
,当水面下降
时,水面的宽度为______
;该石拱桥对应的抛物线的焦点到准线的距离为______ ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db281746f70f790a129f2b896aae9f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4992722d59afdd3b2c5148850dad22ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/122e3b7c79eea7c2874aeea1270f2939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/13/a9f69121-7a59-4c73-a9e7-fa3aacfaa0da.png?resizew=400)
您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
名校
【推荐2】若抛物线
上一点
到焦点的距离是该点到
轴距离的
倍,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd29b2e8192d673308bdf8d5cb6cab.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b4f86e48e2b0d63c1865c60ed1e4d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd29b2e8192d673308bdf8d5cb6cab.png)
您最近一年使用:0次