1 . 若抛物线
(
)的焦点在圆
内,则实数
的取值范围是 .
![](https://img.xkw.com/dksih/QBM/2015/3/21/1572020440006656/1572020445708288/STEM/14aa3f8254cf49e79f8d78a85c0b189d.png?resizew=65)
![](https://img.xkw.com/dksih/QBM/2015/3/21/1572020440006656/1572020445708288/STEM/ea388679403a469494c051e7edaa57b9.png?resizew=41)
![](https://img.xkw.com/dksih/QBM/2015/3/21/1572020440006656/1572020445708288/STEM/50aef8e52d2e47ddbf65ad5ea15b60f2.png?resizew=76)
![](https://img.xkw.com/dksih/QBM/2015/3/21/1572020440006656/1572020445708288/STEM/13ebd90cba1545c097c6df6bf3f88a0c.png?resizew=17)
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2016-12-03更新
|
450次组卷
|
2卷引用:2015届上海市普陀区高三上学期质量调研理科数学试卷
2 . 圆心在抛物线
上,且与x轴和抛物线的准线都相切的一个圆的方程是
![](https://img.xkw.com/dksih/QBM/2015/2/6/1571983905595392/1571983910838272/STEM/b1787531b81e4d30a6add21ffb372df8.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
2016-12-03更新
|
434次组卷
|
2卷引用:2015届上海市杨浦区高三上学期学业质量调研理科数学试卷
2014·上海·二模
3 . 抛物线
的焦点到双曲线
的渐近线的距离是______________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1892b7c3cd7bea116f532f66fba44662.png)
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2011·上海静安·一模
4 . 在正方体
的侧面
内有一动点
到直线
与直线
的距离相等,则动点
所在的曲线的形状
![](https://img.xkw.com/dksih/QBM/2011/4/26/1570131657203712/1570131662143488/STEM/1c9d987df5a0438bb8d7946d9d0740aa.png?resizew=124)
![](https://img.xkw.com/dksih/QBM/2011/4/26/1570131657203712/1570131662143488/STEM/014dccdba48c4b1f822e7a831aba8a05.png?resizew=53)
![](https://img.xkw.com/dksih/QBM/2011/4/26/1570131657203712/1570131662143488/STEM/8eebe5ed603d4bd0874868a28f559b18.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2011/4/26/1570131657203712/1570131662143488/STEM/c2b5d40913c542688436c296ab92613e.png?resizew=33)
![](https://img.xkw.com/dksih/QBM/2011/4/26/1570131657203712/1570131662143488/STEM/17286f9252ca4982a511f8f4162e4615.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2011/4/26/1570131657203712/1570131662143488/STEM/8eebe5ed603d4bd0874868a28f559b18.png?resizew=16)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2013·上海浦东新·三模
5 . 如图,抛物线形拱桥的顶点距水面4米时,测得拱桥内水面宽为16米;当水面升高3米后,拱桥内水面的宽度为_____ 米.
![](https://img.xkw.com/dksih/QBM/2016/5/9/1572622890278912/1572622895865856/STEM/2433c3816dbf4f9f8e3badb1ef20f41a.png?resizew=220)
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2011·上海静安·一模
6 . 经过抛物线
的焦点,且以
为方向向量的直线的方程是__________
![](https://img.xkw.com/dksih/QBM/2011/5/6/1570182210019328/1570182214672384/STEM/e902f05464de445baa1ea3c93c730afb.png?resizew=56)
![](https://img.xkw.com/dksih/QBM/2011/5/6/1570182210019328/1570182214672384/STEM/e18cbf5e33c14a0095a2f85736f0371c.png?resizew=57)
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