已知F为抛物线C:
的焦点,K为C的准线与x轴的交点,点P在抛物线C上,设
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b631e7801c2da2d218760069c32341.png)
A.抛物线C在点![]() | B.![]() ![]() |
C.![]() | D.存在点P,使得![]() |
更新时间:2021-05-08 12:34:52
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【推荐1】已知
,函数
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eae9ba258299eb489b490594397e23c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c319046e654fb2ca6301393577ab820.png)
A.对任意![]() ![]() ![]() |
B.对任意![]() ![]() ![]() |
C.当![]() ![]() |
D.当![]() ![]() |
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【推荐2】已知曲线
:
,抛物线
:
,P为曲线
上一动点,Q为抛物线
上一动点,已知与两条曲线都相切的直线叫做这两条曲线的公切线,则以下说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12be206d66e65eb92ef08bad8cd8f71d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
A.直线![]() ![]() ![]() ![]() |
B.曲线![]() ![]() |
C.![]() ![]() |
D.当![]() ![]() |
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【推荐3】已知点
为
图象上一点,点
为
图象上一点,
为坐标原点,设
,
的夹角为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff6838d84b68c6f0d3b93b196d9b08d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f605ec0729ce6d72237ad662a06862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc9656d8286c4d6fa309d6ae347c89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.![]() ![]() | B.![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() ![]() |
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