若椭圆
上不同的三点
,
,
到椭圆右焦点的距离顺次成等差数列,线段
的中垂线
交
轴于点
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b747db7eaf469c6d1607e4b0d028299f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ab3846607d16a334b4739833f012ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708d0e76f524d0e8a48db01392faac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7bf58e5fea1189b33cf55d86335452f.png)
2018高三·江西·竞赛 查看更多[1]
更新时间:2019-01-28 20:35:58
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知数列
满足
,
,
,
,
.当
时,
. 问:存在多少个正整数
,使得
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced4e381e8c3336848b8c436dbc584f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0748c346ed88f98e424de8edf278325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ba808c24aeae6a2f34b98ae5ec04ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5d0a73f50b3e4583f1c1b6d6bf0d18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c19264d71dfaea84158f8d766cd0b2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ed0e42e79f8cedf5a18636b3fe5ba8.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】已知数列
满足
,
.
(1)求数列
的通项;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2438f2272d7b7ab51dbbe587025a553d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c06b2f41e486c7a8cbcc060d977e29.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d816f11de02156366e6d0d6db3a5dc0.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】已知方程
在
平面上表示一椭圆.试求它的对称中心及对称轴.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d7f219b00684bb611f15e9b1216c0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知抛物线
与二次曲线
有4个不同的交点,由下面的草图可以看出,下面三个结论是成立的,请给出证明.
(1).两曲线的4个交点中,至少有两个交点位于
轴的下方;
(2).抛物线
必与
轴有两个不同的交点,记为
,
,
;
(3).两曲线的4个交点中,必存在一点
,使
.
注.对
、
、
的不同取值会有无数个图形,此处仅就
,
各给出一个示意图,同时也就限制“由图看出”的解答.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a7bfb266e25cb3bfd290b5b46c893d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/408b77d68d040ee42423497a89d4bb70.png)
(1).两曲线的4个交点中,至少有两个交点位于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2).抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63c863184690df7bfd0c1a7f450add43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/549a4e3ca58e5d3f593dfa9a25d57af7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13909e2861ce1a0a64fc9e8b37463a7f.png)
(3).两曲线的4个交点中,必存在一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b50ab6a7146de47638b03ff34b5532.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c1090e3fb6612059a61f18e76511b08.png)
注.对
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf2f46bc120e5b6f8317b02370bffbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2774407f1a7ba58fc4919c87f62a7ba3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/f8b82100-5841-4c29-88fd-e24e35ad80a0.png?resizew=331)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在直角坐标平面
中,凸四边形
的四个顶点都在双曲线
上,其中,点
、
在第一象限,点
、
在第三象限,对角线
经过原点
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f42b2a9736c8943106472a7398d2892.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e853b053d23277b0874566c0e9fab77.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/d13491ac-d672-4251-9191-80ba9c708e71.png?resizew=182)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】P是椭圆
上的任意一定点,以P为圆心作一个圆,与椭圆的长轴AB交于点M、N,设PM、PN分别交椭圆于点E、F.证明:直线EF的斜率为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
您最近一年使用:0次