1 . 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)
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名校
2 . 已知直线
(
为参数)与圆
(
为参数)相切,则直线的倾斜角为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/490f097e98c2e17d30ef95137e955884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3db9457dfff013af94660ac11b95c36b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
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2018-12-09更新
|
639次组卷
|
4卷引用:2018年秋人教B版数学选修4-4第二章检测
3 . 在平面直角坐标系
中,椭圆C的方程为
,F、A分别为椭圆C的上焦点、右顶点.若P为椭圆C上位于第一象限内的动点,则四边形
面积的最大值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/129d42932420b4206cfd0a808218fe7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62fd4a27ab9e0131b238032739f4a596.png)
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4 . 复数z满足
,
在复平面上对应的动点W所表示曲线的普通方程为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70c2519610d6d1d6d0855b0f27dfc5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9b2bf1a47dcda0bdff8bd3996597d65.png)
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5 . 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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6 . 已知实数x、y满足
.则
的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc603fea876cbf85b1efcb5bab0d500f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9c6461cc562a6fb80ec21b67f7fb8d5.png)
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7 . 设点A(2,0),B为椭圆弧
上一点,过点B作y轴的垂线,垂足为C.则四边形OABC面积的最大值为 ______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6d096b3ce75cd748c4cf0624c364401.png)
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8 . 设椭圆
(
)的右顶点为
.如果椭圆上存在一点
使得
(
为坐标原点),则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8019255571cab57db04d6872d1591c5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c6ce02259a85ea191541f4a708738f1.png)
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9 . 已知M是椭圆
在第一象限的弧上一动点,MN ⊥y轴,垂足为N. 当△OMN面积最大时 ,其内切圆半径r=________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f61bc15af695694e89cdb128253dad.png)
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