解题方法
1 . 已知抛物线
与直线
相交于A、B两点,点O是坐标原点.
(Ⅰ)求证:OA
OB;
(Ⅱ)当△OAB的面积等于
时,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b072ff6d1b83232bebd7d4709ffba4ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28760e457d2ba65d158c9667a287e6d5.png)
(Ⅰ)求证:OA
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
(Ⅱ)当△OAB的面积等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60cbb271baca5cd015f30e07d9eebfd8.png)
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2019-07-05更新
|
1351次组卷
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2卷引用:湖北省荆门市2018-2019学年高二下学期期末质量监测数学文试题
2 . 如图,已知直线
交抛物线于
,
两点,其参数方程为
(
为参数,
),抛物线
的焦点为
.求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/7cacd6a6ba12b109ee0374293a90a7a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4313f830e9be762a14205f2c2141d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01bece4bb3068ac3b5f9c875f1111c24.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/c8628c62-185a-4b75-adae-e077b69cfa10.png?resizew=138)
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3 . 已知椭圆
:
,该椭圆经过点
,且离心率为
.
(1)求椭圆
的标准方程;
(2)设
是圆
上任意一点,由
引椭圆
的两条切线
,
,当两条切线的斜率都存在时,证明:两条切线斜率的积为定值.
![](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/1fcf82d01c39fd2c96e1edba0ad37dd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0128793bbbaabe8301b23e4c96ac8583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
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2019-05-19更新
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3053次组卷
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4卷引用:山西省永济中学2018-2019学年高二上学期期末考试数学(文)试题
名校
4 . 已知
是抛物线
上一点,
为
的焦点.
(1)若
,
是
上的两点,证明:
,
,
依次成等比数列.
(2)若直线
与
交于
,
两点,且
,求线段
的垂直平分线在
轴上的截距.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/266504a4bd910b292c74765dc9772f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbb6cbf601c8d08db363827baefc296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20171b65c618928b3f93d5996374722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54dfb134869d6058b3d97ed01658ade0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33b315a25c667233befb2a1d542eb59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a052a4645628e5ba018f5e2f17c1138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4428dc4e1db8f04c28ba1a4e3b3d2bc9.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f514aac874d83740f54a9a717149d00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6f5adf13b4214666292dd64b947741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af405a054bfe7fb7ce40e48d816467e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55fc2bcbded30ecb9441f8fb4c8773c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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2019-04-15更新
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682次组卷
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12卷引用:【省级联考】甘肃、青海、宁夏2019届高三3月联考数学(理)试题
【省级联考】甘肃、青海、宁夏2019届高三3月联考数学(理)试题【省级联考】甘青宁2019届高三3月联考数学(文)试题甘肃宁夏青海三省3月联考2019届高三数学考试(理科)【校级联考】甘肃宁夏青海三省3月联考2019届高三数学考试试题【校级联考】甘青宁部分学校2019届高三3月联考数学(理)试题安徽省皖西南联盟2018-2019学年高二下学期期末联考数学(理)试题安徽省皖西南联盟2018-2019学年高二下学期期末数学(文)试题四川省成都市成都市树德中学2019-2020学年高二上学期期中数学(文)试题2019届甘肃省白银市靖远县高三第三次联考数学(文)试题2019届甘肃省白银市靖远县高三第三次联考数学(理)试题安徽省浮山中学等重点名校2018-2019学年高二下学期期末联考数学(文)试题安徽省浮山中学等重点名校2018-2019学年高二下学期期末联考数学(理)试题
名校
5 . 已知椭圆C:
=1(a>b>0)的离心率为
,其内接正方形的面积为4.
(Ⅰ)求椭圆C的标准方程;
(Ⅱ)设M为椭圆C的右顶点,过点
且斜率不为0的直线l与椭圆C相交于P,Q两点,记直线PM,QM的斜率分别为k1,k2,求证:k1k2为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2aa6ee9b173abc2191c1c19c5392ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f78c38805c09dcfbcc42103308975a74.png)
(Ⅰ)求椭圆C的标准方程;
(Ⅱ)设M为椭圆C的右顶点,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1dc3354ff37472e07900f0d36fa2dc8.png)
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2019-04-26更新
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1956次组卷
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2卷引用:【市级联考】江西省九江市2019届高三第二次高考模拟统一考试文科数学
名校
6 . 已知抛物线C的顶点在坐标原点,焦点F在x轴上,抛物线C上一点
到焦点F的距离为
.
Ⅰ
求抛物线C的标准方程;
Ⅱ
设点
,过点
的直线l与抛物线C相交于A,B两点,记直线MA与直线MB的斜率分别为
,
,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f9647bae17162b7762b696cdd7470d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9558bc4e32934b0bfa2741bb926cdbc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ebcbf2f2ba9ccb685421aab5756b7b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e5b48627db097a918817f8ea405f7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f375dc5addedc5f9fbb72d566939c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731f980ccb6f902d460d0ea2920bfe2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5117784d5f7629ba7d20788328e6a1cd.png)
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2019-03-04更新
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1066次组卷
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5卷引用:【市级联考】四川省成都市2018-2019学年高二上学期期末调研考试数学(文)试题
2019·河北·模拟预测
7 . 已知抛物线
与直线
相交于A、B两点,
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d4872a20fc392c0e368aa3bfe3d8037.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46de5f5993e7dcd0e828081045e502af.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
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名校
8 . 已知椭圆
的左顶点为
,上顶点为
,右焦点为
,离心率为
,
的面积为
.
(Ⅰ)求椭圆
的方程;
(Ⅱ)若
为
轴上的两个动点,且
,直线
和
分别与椭圆
交于
两点.
(ⅰ)求
的面积最小值;
(ⅱ)证明:
三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b929a31d169a811004f0ecd6b7984e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f190b17530d81d927c358ac84757a4.png)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0451f9e4f4db57e9ae978cdc27325698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4bc45ba4c2ad98835bfdd40c2212ba9.png)
(ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a5c35b41bb1a8fa59998a6dcc791f1.png)
(ⅱ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3164cee2c39a8caf527e70a0c07a134f.png)
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9 . 已知
为椭圆
的右焦点,点
在
上,且
轴.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/511d3ab1-abe7-45ee-9de7-56af51dd98df.png?resizew=171)
(1)求
的方程
(2)过
的直线
交
于
两点,交直线
于点
.证明:直线
的斜率成等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5f4493abd2b69f83eae0362c509f1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b1da9046b4cb82135a4a1eaa528c53.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/511d3ab1-abe7-45ee-9de7-56af51dd98df.png?resizew=171)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c77f8d0c1396be699ccacac8bcc56724.png)
您最近一年使用:0次
名校
10 . 已知抛物线经过点
,其焦点为F.M为抛物线上除了原点外的任一点,过M的直线l与x轴,y轴分别交于A,B.
(1)求抛物线C的方程以及焦点坐标;
(2)若△BMF与△ABF的面积相等,求证:直线l是抛物线C的切线.
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2019-02-14更新
|
352次组卷
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2卷引用:【区级联考】北京市石景山区2019届高三第一学期期末数学(理)试题