已知
,
为椭圆C:
的左、右顶点,且椭圆C过点
.
(1)求C的方程;
(2)过左焦点F的直线l交椭圆C于D,E两点(其中点D在x轴上方),求
的取值范围.
![](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/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2de52259b426acb42761fec59a7748.png)
(1)求C的方程;
(2)过左焦点F的直线l交椭圆C于D,E两点(其中点D在x轴上方),求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8da7c4a8098642394694f9b58f1a6b8.png)
23-24高三上·云南·阶段练习 查看更多[3]
更新时间:2023-09-30 11:49:39
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相似题推荐
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐1】已知椭圆
过点
且离心率为
.
(1)求椭圆
的标准方程;
(2)若椭圆
上存在三个不同的点
,满足
,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0468521368650a5846a901eaf5400798.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999bcbd024bec7b4a2596e8db4538ae3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6eb636460c08f94a3f7aa08dc4870f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14e902eb263971b466d0fcd91c56b453.png)
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解答题-问答题
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解题方法
【推荐2】已知椭圆
:
的左焦点为
,上顶点为
.直线
与椭圆
交于另一点
,且
,点
在椭圆
上.
(1)求椭圆
的方程.
(2)过点
,且斜率为
的直线
与椭圆
相交于
,
两点,点
关于
轴的对称点为
,作
,垂足为
.是否存在定点
,使得
为定值?若存在,求出定点
的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0944c99f34ee41bea845303ed15a7d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7931446c2c35d8cd83b0c1261c89f146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee7ff8d52a34b3b2c36cd46ddd3a423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ed90ebf0061c8a79beed307fc1719a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93492af931b24ef9256f8f821a464d8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3288fde2db6404870dd1f60f33f79fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
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【推荐1】已知椭圆C的中心在坐标原点O,焦点在x轴上,离心率等于
,它的一个顶点B恰好是抛物线
的焦点.
(1)求椭圆C的方程;
(2)直线l与椭圆C交于
两点,那么椭圆C的右焦点F是否可以成为
的垂心?若可以,求出直线l的方程;若不可以,请说明理由.(注:垂心是三角形三条高线的交点)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
(1)求椭圆C的方程;
(2)直线l与椭圆C交于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d0469336f71edd52dc9148c67db052.png)
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【推荐2】定义:由椭圆的两个焦点和短轴的一个顶点组成的三角形称为该椭圆的“特征三角形”.如果两个椭圆的“特征三角形”是相似的,则称这两个椭圆是“相似椭圆”,并将三角形的相似比称为椭圆的相似比.已知椭圆
.
(1)若椭圆
,判断
与
是否相似?如果相似,求出
与
的相似比;如果不相似,请说明理由;
(2)写出与椭圆
相似且短半轴长为
的椭圆
的方程;若在椭圆
上存在两点
、
关于直线
对称,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c368427afb8eb4c7bbeda129665950f7.png)
(1)若椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac07fb87831a560d43952aa5d5c3496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211b9e53e4677ae9e2b20d5f7ce0a4e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a52e26180930ad5b56a8a45f28a0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211b9e53e4677ae9e2b20d5f7ce0a4e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a52e26180930ad5b56a8a45f28a0f2.png)
(2)写出与椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211b9e53e4677ae9e2b20d5f7ce0a4e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fdeba282b028321696be7f90f2cbfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca18c89c398b435447b1970f6f00a43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca18c89c398b435447b1970f6f00a43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a28be4d5a16cf245f6fa7c4088fee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9eeee83b4b7c6ceac7828ff534ce15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a809b1f0e6f0aade0298bf90fac9c6c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fdeba282b028321696be7f90f2cbfe.png)
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【推荐1】已知动直线
与椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
交于![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
、![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/463f33e7a9f64c25b22e117e9acf6bba.png)
两不同点,且△
的面积
=
,其中
为坐标原点.
(1)证明
和
均为定值;
(2)设线段
的中点为
,求
的最大值;
(3)椭圆
上是否存在点
,使得
?若存在,判断△
的形状;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/c39c3d7da7ee454d943dc746f8033277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/edb64638602145e6ad2465aa7558b838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/b7cbe8789da041f8af7a74dd608f8cf6.png)
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/463f33e7a9f64c25b22e117e9acf6bba.png)
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/2cc50714e66c451a9d50dc94eddaf91e.png)
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/fe23e86ea1c44030babce31a403e8565.png)
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/c2b367c289ce48e08b0dc0571763e672.png)
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/77d1a82c4084483eb5689bcbd379fb7e.png)
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/24ab12f6777a4611b159bf4902634a90.png)
(1)证明
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/c3d215a4d133455cb14e3858e4625237.png)
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/6c5e27b32fd64db18fe9c4c7815f2a4b.png)
(2)设线段
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/da1339e15f1e43a399a6a43e1b849377.png)
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/7a7b8c2b614a4aa38778598e95f18888.png)
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/bcab75d89c1a4bcd80a62a30167bad57.png)
(3)椭圆
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/3aff307523f54ebd8b67d41e5aa676d1.png)
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/7609617620994080b24e7a2497dd8a8f.png)
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/2e4e1d51aec04fbf88c760f3f16455b5.png)
![](https://img.xkw.com/dksih/QBM/2014/3/5/1571544941871104/1571544947687424/STEM/e840cf07ac5042e997bf0761dc201f83.png)
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解答题-问答题
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(0.4)
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【推荐2】设
为坐标原点,椭圆
:
,斜率为
的动直线
(
不经过
)与
交于
,
两点,
为线段
的中点.
(1)设直线
的斜率为
,求
的值;
(2)若
经过点
,求
的取值范围,并求
的面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d80b861ba40387cb2bcd04945f5a371a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(1)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c99b54d67e3c6c2896d7eb92ea65dc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/310f780f4f03699023b1322a1e002539.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
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