已知
为抛物线
上一个动点,
为圆
上一个动点,则点
到点
的距离与点
到抛物线的准线的距离之和最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a14af2a16ad9ca9d5636a38d09caac3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
A.![]() | B.![]() | C.2 | D.![]() |
2020·黑龙江哈尔滨·一模 查看更多[2]
更新时间:2020-07-13 10:14:13
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【推荐1】若点
是圆
:
上一点,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c7efc17b972e0bb29c8e68ff6762c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ebc856291255f2d4a6c20b982a2442.png)
A.2 | B.4 | C.6 | D.8 |
您最近一年使用:0次
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【推荐2】已知双曲线
的左焦点为
,点
是双曲线
右支上的一点,点
是圆
上的一点,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae5d11f476b6edba2c25e066eb639c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f896f4d6de4f645faa0db58ccd0c565.png)
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A.5 | B.![]() | C.7 | D.8 |
您最近一年使用:0次
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【推荐1】设抛物线
的焦点为
,点
为抛物线
上一点,若
,则直线
的倾斜角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8596b271d7674ff630939ae1a512897a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd23e63c20d624342980ca7c03cd5921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93dd4d854fbc236bccbd97a5d715fe97.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐2】已知抛物线
上的一点到焦点的距离是到
轴距离的2倍,则该点的横坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0261104a7c308433a0c0508ff20ea29a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
A.![]() | B.![]() | C.2 | D.![]() |
您最近一年使用:0次
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较易
(0.85)
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【推荐1】已知抛物线
的焦点为F,M是抛物线E上一点,N是圆
上一点,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f4fb72e39d79b7a0cd892fa5fa34bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6659e27902541cc9fa1e9301fefb90dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45b2ddeb37779605287cef2747cfeaa3.png)
A.4 | B.5 | C.6 | D.7 |
您最近一年使用:0次
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解题方法
【推荐2】已知抛物线
的焦点为F,点P在C上,若点
,则
周长的最小值为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c1ba86ffc6e5542b62319848c14acaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180ccae8c48f39e5d6c01d3656dfab5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adccd1dd14171c8c29d4a3836728c0f.png)
A.13 | B.12 | C.10 | D.8 |
您最近一年使用:0次