过椭圆
的左焦点
引倾斜角为
的直线
交椭圆于
,
两点,交两准线于
,
两点,若
,
,
成等比数列,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf80369ceae912b700e10970a47bb51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44e8bc37ed03f44470762748a8f942a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967a8170c252dcdf8e29ea4ef6c99c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1a881e16b2771ac63f6996dfb539a2e.png)
2018高三·全国·竞赛 查看更多[1]
更新时间:2018-12-10 15:21:42
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相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】设函数
,其中,
,
.已知当
时,
取得最大值.
(1)求
的值;
(2)设
,求函数
在
上的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fecd2dc5603478be1d2818a176f9e4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dcadd1781ee9177e9bc76ce48afdd0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f56a20bc5fce6b02217627b42249854.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97a1894f18b2b4b21e00166046a208f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95a1d9a86dac105a6136ab2452b35b2.png)
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解答题-证明题
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适中
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【推荐2】已知
.求证:关于
的二次方程
,
,
中至少有一个具有两个不等的实数根.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6615a744a90deb94ee2bc608eabeb8ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76e8ab47e1d51af185afd2ca39f61081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a60dc74603b60998930125a04e7c618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58035f101382a611fbbfc422d16fea7b.png)
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解答题-问答题
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【推荐1】过抛物线
(p为不等于2的质数)的焦点F,作与x轴不垂直的直线l交抛物线于M、N两点,线段
的垂直平分线交
于P点,交x轴于Q点.
(1)求
中点R的轨迹L的方程;
(2)证明:L上有无穷多个整点(横、纵坐标均为整数的点),但L上任意整点到原点的距离均不是整数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc58c62444bf42a25289c45425a00f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(2)证明:L上有无穷多个整点(横、纵坐标均为整数的点),但L上任意整点到原点的距离均不是整数.
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解答题-作图题
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适中
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【推荐2】在平面直角坐标系上,已知点
,
,
是平面上的一个动点,设
,
,满足
.
(1)求
的取值范围;
(2)求点
的轨迹,并画出它的图像.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c850811ba59a05e945a665196539a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/654159e5670167bd400ad8bf02d57632.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2428a66ef7d3a2325fd3e74a0997a61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b0ba5c937b27a27b5ef5ab9e51a935.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐1】如图 ,在平面直角坐标系中, 长度为 6的线段
的一个端点
在射线
上 滑 动 , 另 一 个 端 点
在 射 线
上滑动, 点
在线段
上 , 且 P
.
![](https://img.xkw.com/dksih/QBM/2018/12/14/2096449728692224/2097424263905280/STEM/84e482187de4482186d267c6bcdbb2d0.png?resizew=131)
(1)求点
的轨迹方程;
(2)若点
的轨迹与
轴 、
轴分别交于点
、
, 求四边形
面积的最大值(其中
是坐标原点).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5587b0844361687d10dc4118aa472b37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/409431759e9a191933bb9e492050ec17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21403fc44481c9ffabe3a3df2781970.png)
![](https://img.xkw.com/dksih/QBM/2018/12/14/2096449728692224/2097424263905280/STEM/84e482187de4482186d267c6bcdbb2d0.png?resizew=131)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/de6c989fd224866658230526892e2bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
【推荐2】已知半椭圆
,过一定点
作两条互相垂直的直线与椭圆分别交于点
、
,其中,
为坐标原点,
、
分别为椭圆的左、右焦点.
(1)求
的最小值;
(2)是否存在直线,使得
与
互相垂直?若存在,求出点
、
的横坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df00b63e340761bfff300aa48096d76f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca0b4afd16b79370532de44989d6c43d.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d361834625542ef331bb3b4bfa67433.png)
(2)是否存在直线,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cc6d51d02b0eb21e6f3a99b72f5d3cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d14455b5f9e6bdabb463919625b778b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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【推荐1】如图,CD为椭圆
的一条直径,过椭圆长轴的左顶点A作CD的平行线,与椭圆交于另一点N,与椭圆短轴所在直线交于点M.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dda1af75e15570adc20926250880994.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/31/bdd3639d-5cb2-4701-8aab-178526f99e6f.png?resizew=208)
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【推荐2】已知椭圆
与y轴正向的交点为B,求以点B为直角顶点的椭圆内接等腰直角三角形的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
您最近一年使用:0次