解题方法
1 . 过椭圆C:
的右焦点
作一条倾角为
的直线交椭圆于A、B两点,若满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/792d799970f7e1ea7add36b2b9fe14a9.png)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448462848/STEM/d7e58b4883fb45c1af3edac025d6efc3.png?resizew=12)
(1)求椭圆C的离心率;
(2)若椭圆C的左焦点
到直线AB的距离为2,求椭圆C的方程.
![](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/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/792d799970f7e1ea7add36b2b9fe14a9.png)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448462848/STEM/d7e58b4883fb45c1af3edac025d6efc3.png?resizew=12)
(1)求椭圆C的离心率;
(2)若椭圆C的左焦点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
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2 . 过椭圆
的右焦点作斜率为2的直线交椭圆于
两点, 求线段
的长度.
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448446464/STEM/fd5bea3363b844f681b991c411729493.png)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448446464/STEM/f2ca0b67ee574878a1b4ee5e591e4544.png)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448446464/STEM/4ec1386c3e04478ba180d6d573e1edbc.png)
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名校
3 . 若方程
所表示的曲线为C,给出下列四个命题:
①若C为椭圆,则
;
②若C为双曲线,则
或
;
③曲线C不可能是圆;
④若
,曲线C为椭圆,且焦点坐标为
;
⑤若
,曲线C为双曲线,且虚半轴长为
.
其中真命题的序号为____________ .(把所有正确命题的序号都填在横线上)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448421888/STEM/34d53b6959004ed8ba05eab554f88683.png?resizew=100)
①若C为椭圆,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ccc2e60c40781eca527195c5a721169.png)
②若C为双曲线,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1932c00b61c73304e605ea1375e70867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6057df53aac56374ddf8146623f64678.png)
③曲线C不可能是圆;
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a30d1ca1489fb48d1f5a43c004c926.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8db82399d4cded646d713050656e6a9.png)
⑤若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6057df53aac56374ddf8146623f64678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45efa27ae916e8258d3f38685db3b67e.png)
其中真命题的序号为
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2016-12-05更新
|
2091次组卷
|
3卷引用:2016-2017学年广东清远清城区三中高二文上学期第二次月考数学试卷
4 . 一条渐近线方程为
,焦点(4,0),则双曲线的标准方程为______________ .
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448380928/STEM/053fe261006c4c88b19ed6f73f7651df.png?resizew=57)
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5 . 已知
,
是双曲线
的虚轴顶点,
其焦点,
是双曲线上一点,圆
是
的内切圆,则
的面积为____________ .
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448397312/STEM/e5795514ae494ac38cffdc0602a3e8eb.png?resizew=18)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448397312/STEM/f503eef57b1b4b5db35a537c0196bce1.png?resizew=20)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448397312/STEM/9b425bbf3ca34a96bdb4e6660dd4f8d5.png?resizew=80)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448397312/STEM/4124178d58e44d239cd09aa7f8b502fd.png?resizew=40)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448397312/STEM/0036b6a920914270934db6ad36dc2d44.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448397312/STEM/a559c5b1b5cd4da088fd6a8d5ff37a1c.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448397312/STEM/12e9d0c1693d4b9fb08f3280fdabd746.png?resizew=52)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448397312/STEM/d15e8f6ebc944d5b84d890dd5ca82a31.png?resizew=55)
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6 . 如果实数x,y满足
,
恒成立,则
的取值范围是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271e595c257e4c0ade90a9bbbf0e6b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36d47fa885ceb9998564d6f911aae8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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7 . 点
是双曲线
的右支上一点,
是圆
上一点,点
的坐标为
,则
的最大值为
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448339968/STEM/63a933e84ece446ab46ef364e84ffae1.png)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448339968/STEM/8bd19314d0554185a9e006780958ace8.png)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448339968/STEM/6648f38a865541c19dd4837d017b2c1f.png)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448339968/STEM/9db9ef8833ad461296a2a1d49464e8a7.png)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448339968/STEM/cab295e35c0f4f93ac1f18d37e7489e9.png)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448339968/STEM/75cede12e41842b085938f9ab7bde0a5.png)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448339968/STEM/82496eff09ac4131bf8419a6b8dcae8a.png)
A.5 | B.6 | C.7 | D.8 |
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8 . 点
是椭圆
上一点,
分别是椭圆的左、右焦点,若
,则
的大小为
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448290816/STEM/1f2c35c5d3cd402ea82ab93bdc9d3bc1.png)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448290816/STEM/0559a0b46c114d8d9fb930fd4f65705a.png)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448290816/STEM/5cc803d0a22941dc9cbc85679e8e2e36.png)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448290816/STEM/43c226af9fc7436f8910dffc59baa5ed.png)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448290816/STEM/e3f38f94aa5c4613b850ceecb0250a0d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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9 . 点
、
分别为椭圆
的左、右焦点,
为短轴一端点, 弦
过左焦点
, 则![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448315392/STEM/795e4edc3ac7448abee4fa4e2fb8d786.png)
的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448315392/STEM/c28f43d4bf8f4c759d297e94d124ba1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168442884096/1573168448315392/STEM/795e4edc3ac7448abee4fa4e2fb8d786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef419f0740dae5db5cc51675bc51afb.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 以O为中心,点F1,F2为椭圆两个焦点,椭圆上存在一点M,满足|
|=2|
|=2|
|,则该椭圆的离心率为.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eef441552bb57696e1151988ad6e8d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ac8dae4c9a5db8369c7a09b111dc5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a69a86f3b25d0b829977a571a7fd507.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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