定义:圆锥曲线C:
的两条相互垂直的切线的交点Q的轨迹是以坐标原点为圆心,
为半径的圆,这个圆称为蒙日圆.已知椭圆C的方程为
,P是直线l:
上的一点,过点P作椭圆C的两条切线与椭圆相切于M,N两点,连接OP(O是坐标原点),当
为直角时,
的值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da001dad7941e6c9858637d7b62cec59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09c03c6b8d7418edf20f474389971352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31b29e36dd3b61263a54f56855ca5740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45a8a837c11c07073da3ff751d70278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/023037c7a3e31ba698c39f9b52db2515.png)
更新时间:2023-11-11 00:12:03
|
相似题推荐
填空题-单空题
|
适中
(0.65)
【推荐1】已知
为圆
:
上第二象限的一动点,直线
,
与圆
的另一个交点分别为
,
,且直线
,
的斜率之和为0,则直线
的斜率是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bec550c01b4f075f22ab67f5e55ed5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08227ca941898eb34941f446ca8b1de8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
解题方法
【推荐2】当曲线
与直线
有两个不同交点时,则
的取值范围为___________ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83f4d97e9506ef1f5b156219068f00ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95395d7cb2ed354fab4a55bf53d0b753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
【推荐1】已知直线
(
,
是非零常数)与圆
有公共点,且公共点的横坐标和纵坐标均为整数,那么这样的直线共有______ 条(用数字作答).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89f6e613ffa032e7e893daa1970d3948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439d1b2ec181dfdebddd8bc7b2a490de.png)
您最近一年使用:0次
【推荐2】设直线系
,对于下列七个命题:
A.存在一个圆与所有直线相交
B.存在一个圆与所有直线不相交
C.存在一个圆与所有直线相切
D.M中的直线所能围成的正三角形面积都相等
E.M中所有直线均经过一个定点
F.存在定点P不在M中的任一条直线上
G.对于任意整数
,存在正n边形,其所有边均在M中的直线上
其中真命题的代号是________ (写出所有真命题的代号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424f0cc922a4921b424d571dad46c38e.png)
A.存在一个圆与所有直线相交
B.存在一个圆与所有直线不相交
C.存在一个圆与所有直线相切
D.M中的直线所能围成的正三角形面积都相等
E.M中所有直线均经过一个定点
F.存在定点P不在M中的任一条直线上
G.对于任意整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8715a3f984d2627afd7c40c61347b7cb.png)
其中真命题的代号是
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
【推荐1】在平面直角坐标系
中,A为直线
上在第一象限内的点,
,以AB为直径的圆C与直线l交于另一点D.若
,则点A的横坐标为________ .
![](https://img.xkw.com/dksih/QBM/2018/12/14/2096485383389184/2100268390039552/STEM/455d26f2303f4d62a62debaa36a650db.png?resizew=23)
![](https://img.xkw.com/dksih/QBM/2018/12/14/2096485383389184/2100268390039552/STEM/6806bdfb26b84d86bf37a3ebadcc7ef3.png?resizew=42)
![](https://img.xkw.com/dksih/QBM/2018/12/14/2096485383389184/2100268390039552/STEM/0da0b0ca4295451d85b586929b61353b.png?resizew=34)
![](https://img.xkw.com/dksih/QBM/2018/12/14/2096485383389184/2100268390039552/STEM/db77f033c20d4031bba355d22ac509ab.png?resizew=68)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
解题方法
【推荐2】给出下列四个命题:
①命题“
,
”的否定是“
,
”;
②“
”是“直线
与直线
相互垂直”的必要不充分条件;
③设圆
与坐标轴有
个交点,分别为
,则
;
④关于
的不等式
的解集为
,则
.
其中所有真命题的序号是____________ .
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8645952ea14b25443f411d39bdec641e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d3a6268e9eded3dba57ab5d93cf556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51397d3252620200d1bfcccf05711082.png)
②“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0db2c49919467a2e14540f2aabd05cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01f2082e494383c81cd6e6bab26abdc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c68e49e43e41daaf08acd26ca1ddc90.png)
③设圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c149a507872546a8bc72bb40ecbca4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4afbe3127ff48be722399f7137d6c4fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114fb3679c5cd478bd8e6d6690adf9fb.png)
④关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e20752bb6729e7b552456ab10bcbb72c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b5b2a5b0e5f53d36214145285dc2bb9.png)
其中所有真命题的序号是
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
【推荐1】已知两定点
,若直线上存在点
,使得
,则该直线为“
型直线”.给出下列直线,其中是“
型直线”的是___________ .
①
②
③
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69ad5c0119568295fb183dcca8e0f092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e74c84de9ea091cc6dbe1e5e1f85c107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31c4f39399ec245a67db2933ed639f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9355031ea0b2dc9cef3777621bc6d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae652daf6059ff386f99bef2210518c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/887d13887d7e80f5acd551b54561bdf5.png)
您最近一年使用:0次
填空题-双空题
|
适中
(0.65)
【推荐2】已知抛物线方程
,
为焦点,
为抛物线准线上一点,
为线段
与抛物线的交点,定义:
.已知点
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e711fdfad430a02aff0705d4a2e6b17a.png)
___________ ;设点
,若
恒成立,则
的取值范围为___________ .
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9fd86488450b45987465e83094bf183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ad63077bd5c3e70db36b608beb0b21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e711fdfad430a02aff0705d4a2e6b17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48490c1cb1414f24d493b55755d6d5d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/600c261b030650beda92627562e7fd51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次