若
是抛物线
的焦点,
是抛物线
上任意一点,
的最小值为1,且
是抛物线
上两点,线段
的中点到
轴的距离为
, 则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.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/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/248f9bb8dd23ab0fa70e774678d91641.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-05-21 10:35:45
|
相似题推荐
单选题
|
较易
(0.85)
名校
【推荐1】如图所示,过抛物线
的焦点F的直线依次交抛物线及准线于点A,B,C.若
,且
,则抛物线的方程为( )
![](https://img.xkw.com/dksih/QBM/2022/1/8/2890013856129024/2913883144527872/STEM/6feb331e-ef14-4360-af35-6a921b6805bb.png?resizew=157)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b8140e6daefb5adf1044c813e0b212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ed9b2d4c4fe575e806daf5000efb83.png)
![](https://img.xkw.com/dksih/QBM/2022/1/8/2890013856129024/2913883144527872/STEM/6feb331e-ef14-4360-af35-6a921b6805bb.png?resizew=157)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐2】已知点
在抛物线
上,
为抛物线的焦点,直线
交
轴于点
.若
为线段
的中点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcf8eb88cfd81f78a3dc0e35f5c2f102.png)
A.3 | B.6 | C.![]() | D.12 |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
解题方法
【推荐1】设抛物线
:
的焦点为
,
为坐标原点,
是
上一点.若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/2b333ae64eb8e235779e9fdaa24e6247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74518fed7a017a94f2b77a50148cf12c.png)
A.![]() | B.5 | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
解题方法
【推荐2】已知抛物线
第一象限上一点
到其焦点的距离为10,则点
的纵坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
A.![]() | B.4 | C.![]() | D.8 |
您最近一年使用:0次