1 . 已知椭圆
:
的焦距为4,设右焦点为
,过原点
的直线
与椭圆
交于
,
两点,线段
的中点为
,线段
的中点为
,且
.
(1)求弦
的长;
(2)若直线
的斜率为
,且
,求椭圆
的长轴长的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ec56b59d6f2654570c2b5c4fd13a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed0cff7764c066a8e98d7d314ad4dab.png)
(1)求弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d3a1e3a58e6f1510eaa85c9b6970f94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
解题方法
2 . 已知椭圆
:
的焦距为4,设右焦点为
,过原点
的直线
与椭圆
交于
,
两点,线段
的中点为
,线段
的中点为
,且
.
(1)若离心率
,求椭圆
的方程;
(2)求椭圆
的长轴长的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1879f1ec0008af08ab6b133f163f12dc.png)
(1)若离心率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c7316976a221c051a2c14df80b1347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
3 . 已知椭圆
的离心率为
,右顶点为
.
(Ⅰ)求椭圆
的方程;
(Ⅱ)过点
的直线
交椭圆于
两点,设直线
的斜率为
,直线
斜率为
.
求证:
为定值,并求此定值.
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572571092992000/1572571098677248/STEM/2c4caf7fa9014a518ccd1f4f18709fa6.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572571092992000/1572571098677248/STEM/99c53a02cbbd402387f2dba31d55b374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d295a4cc3a58f9f38ee98337313c81.png)
(Ⅰ)求椭圆
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572571092992000/1572571098677248/STEM/a1d53ddd934849218ab9ffa7162825ed.png)
(Ⅱ)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dd6d548b550906f38ba3c32c2c35713.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbdb21011ea821b91d539cb763aac649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4757181824e15e0f21e5bdd55448783.png)
您最近一年使用:0次
14-15高三上·四川·阶段练习
名校
4 . 设
、
分别是椭圆
的左、右焦点.
(1)若
是该椭圆上的一个动点,求
的最大值与最小值.
(2)是否存在过点
的直线
与椭圆交于不同的两点
,使得
?若存在,求直线
的方程;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82766cfd2b7c59c7fac5b827ae5863b2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd401c82c118e0fd5564af5f8dac3346.png)
(2)是否存在过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c905c723e30f28088fd7f7dc09ef1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be400f053229da1b1f5670429efd931a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2016-12-03更新
|
2578次组卷
|
4卷引用:黑龙江省哈尔滨九中2021届高三五模数学(理)试题
黑龙江省哈尔滨九中2021届高三五模数学(理)试题【全国百强校】黑龙江省哈尔滨市第六中学2019届高三上学期期末考试数学(文)试题黑龙江省哈尔滨市第九中学2021届高三下学期第五次模拟考试理科数学试题(已下线)2015届四川省巴蜀好教育联盟12月大联考理科数学试卷
2010·黑龙江哈尔滨·一模
解题方法
5 . 已知椭圆
(
)的离心率为
,且短轴长为2.
(1)求椭圆的方程;
(2)若与两坐标轴都不垂直的直线
与椭圆交于
两点,
为坐标原点,且
,
,求直线
的方程.
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601453056/STEM/3c8b85fd26374e26bb638c1d592a1766.png?resizew=76)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601453056/STEM/8e204d0d444d474eaf41dd5c6f126249.png?resizew=56)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601453056/STEM/91175f1cb18c401a87c43bbc37664eb4.png?resizew=27)
(1)求椭圆的方程;
(2)若与两坐标轴都不垂直的直线
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601453056/STEM/46ffa2e7d74449cbb12b2e73b35ad343.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601453056/STEM/6bc25f05e4954aaab842ab99f74b52dc.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601453056/STEM/6e7ff867506a43f89a4ad11358d54bec.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601453056/STEM/ac7884b56b5b4005ada7a4f42e793651.png?resizew=76)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601453056/STEM/d0d575c668724c9f8b87323a156ebcee.png?resizew=64)
![](https://img.xkw.com/dksih/QBM/2010/4/7/1576715455873024/1576715601453056/STEM/46ffa2e7d74449cbb12b2e73b35ad343.png?resizew=9)
您最近一年使用:0次