14-15高二上·江苏扬州·期末
1 . 如图平面直角坐标系
中,椭圆
的离心率
,
分别是椭圆的左、右两个顶点,圆
的半径为
,过点
作圆
的切线,切点为
,在
轴的上方交椭圆于点
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03dc9b47d479265a0ad2b4b85e2ed1a2.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/12/cc6085c8-f689-4704-8d49-c8f99ce792d7.png?resizew=250)
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14-15高二上·北京东城·期末
名校
2 . 过椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
的左顶点A的斜率为
的直线交椭圆
于另一点
,且点
与右焦点
的连线垂直于
轴,若
,则椭圆的离心率
的取值范围是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
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3 . 已知椭圆
:
的短轴长为2,离心率为
,设过右焦点的直线
与椭圆
交于不同的两点A,B,过A,B作直线
的垂线AP,BQ,垂足分别为P,Q.记
, 若直线l的斜率
≥
,则
的取值范围为___ .
![](https://img.xkw.com/dksih/QBM/2017/4/12/1664152670633984/1720698758316032/STEM/47b70950d14048068e5031318bfb5f33.png?resizew=16)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/2017/4/12/1664152670633984/1720698758316032/STEM/7fb373a2788341788272c8a243299330.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2017/4/12/1664152670633984/1720698758316032/STEM/47b70950d14048068e5031318bfb5f33.png?resizew=16)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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4 . 已知椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
的离心率为
,右焦点为
,点
在圆
上,且
在第一象限,过
作圆
的切线交椭圆于
,
两点.若
的周长为
,则椭圆
的方程为____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
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2017-06-29更新
|
1520次组卷
|
2卷引用:湖北省武汉市重点中学4G+联合体2022-2023学年高二上学期期末联考数学试题
名校
5 . 已知椭圆C:
的左右焦点分别为
,
,点P在椭圆C上,线段
与圆:
相切于点Q,若Q是线段
的中点,e为C的离心率,则
的最小值是______________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8585676a37a64ce866ccf7723ccd0a8d.png)
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2017-04-12更新
|
3175次组卷
|
6卷引用:2016-2017学年河南省豫南六市高二下学期第一次联考数学(理)试卷
6 . 椭圆
的左、右焦点分别为
,上、下顶点分别为
,右顶点为
,直线
与
交于点
.若
,则
的离心率等于__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef6b94e42869013745050aba059b58dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc9076974ebd6331d67055302be8167.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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2017-04-11更新
|
1242次组卷
|
2卷引用:【全国百强校】江西省南昌市第十中学2018-2019学年高二上学期第二次月考数学(文)试题
7 . 以下四个命题:①若函数
(x∈R)有大于零的极值点,则实数m>1;②若抛物线
上一点M到焦点的距离为3,则点M到
轴的距离为2;③方程2x2-5x+2=0的两根可分别作为椭圆和双曲线的离心率;④已知函数
在
处取得极大值10,则
的值为
或
.其中真命题的序号为____________ (写出所有真命题的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fcae7e3e1117e966462690a38ca4d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
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![](https://img.xkw.com/dksih/QBM/2016/5/4/1572613993439232/1572613999386624/STEM/c2cc37d5a386417e99de4c72d1eb5c3d.png?resizew=35)
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8 . 已知
是椭圆
短轴上的两个端点,O为坐标原点,点A是椭圆长轴上的一个端点,点P是椭圆上异于
的任意一点,点Q与点P关于
轴对称,给出以下命题,其中所有正确命题的序号是___________ .
①当P点的坐标为
时,椭圆的离心率为
;
②直线
的斜率之积为定值
;
③
;
④
的最大值为
;
⑤直线
的交点M在双曲线
上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d468be20b4d43f5de75416de20e8ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d468be20b4d43f5de75416de20e8ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
①当P点的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9691014ef7d4e110f410d705da14f367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/523d6d2df2eae6e9da0e65bfa20e0563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f950f722a326aa7e191828f1373284.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2a25fdfc65b93db575402a96a086fb.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69cc84500e6b3e84469ec0176d9b2e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e075d59f303f612c1f9be5e6b60163.png)
⑤直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc33de148c7042c7fc1c009f4ae7709b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d960ceb806d32113df2bc1b104d2660.png)
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解题方法
9 . 已知椭圆
的右焦点为
,设
为椭圆上关于原点对称的两点,
的中点为
,
的中点为
,原点
在以线段
为直径的圆上.若直线
的斜率
满足
,则椭圆离心率
的取值范围为 _______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ba2238d6afe0187534155dd9ac48c6.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
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解题方法
10 . 已知椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
的右焦点为
,离心率为
.设A,B为椭圆上关于原点对称的两点,
的中点为M,
的中点为N,原点
在以线段
为直径的圆上.设直线AB的斜率为k,若
,则
的取值范围为_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434249d6640b0c1a712d215cf8b83d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdce3ea2321466c556731e52f13c62af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabea664e61863b3b3279dbce607924e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbad65b3d744b70da2480eee1cdb587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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![](https://img.xkw.com/dksih/QBM/2015/8/7/1572207888957440/1572207894904832/STEM/b25f5683-9f1f-4e34-81b7-4c66e5947328.png?resizew=291)
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2016-12-03更新
|
1512次组卷
|
3卷引用:2014-2015学年江苏省扬州市高二上学期期末考试数学试卷