已知两点
.如果抛物线
上存在点
,使得
为等边三角形,那么实数
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca3134632e3a2190407d7abc9cb5ee6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
A.![]() | B.![]() ![]() | C.![]() ![]() | D.![]() |
更新时间:2023-02-23 14:43:22
|
【知识点】 根据抛物线的方程求参数
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【推荐1】将抛物线
绕其顶点顺时针旋转
之后,正好与抛物线
重合,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec68c680d1b8c8cfa98b48a27d2c46a1.png)
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单选题
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较易
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名校
【推荐2】若抛物线
的焦点坐标为
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb573fb6f6f37fd615e35c4073c2919.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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