名校
解题方法
1 . 过抛物线
的焦点
作直线交抛物线于
,
两点,
为线段
的中点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.以线段![]() ![]() |
B.以线段![]() ![]() |
C.当![]() ![]() |
D.![]() ![]() |
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5卷引用:河北省保定市七校2021-2022学年高一下学期7月联考数学试题
名校
解题方法
2 . 过抛物线
的焦点F的直线交抛物线于A、B两点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52f1023b75ee83619e722acb06d1925.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52f1023b75ee83619e722acb06d1925.png)
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3 . 如图所示,Rt△AOB的直角边OA在x轴上,OA=2,AB=1,将Rt△AOB绕点O逆时针旋转90°得到
,抛物线
经过B、D两点.
(1)求二次函数的解析式;
(2)连接BD,点P是抛物线上一点,直线OP把△BOD的周长分成相等的两部分,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61728892e2b3840fdcac716578f0bac1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fc399fc6c26b476e87ff405b1d317.png)
(1)求二次函数的解析式;
(2)连接BD,点P是抛物线上一点,直线OP把△BOD的周长分成相等的两部分,求点P的坐标.
![](https://img.xkw.com/dksih/QBM/2018/9/3/2024255076147200/2040158702329856/STEM/e7980d9ddb4f4f59b26d76d5b89442a3.png?resizew=162)
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2014·浙江嘉兴·一模
解题方法
4 . 如图,已知抛物线
:
,过焦点
斜率大于零的直线
交抛物线于
、
两点,且与其准线交于点
.
![](https://img.xkw.com/dksih/QBM/2016/10/10/1573062394052608/1573062399696896/STEM/95963af0cdf7431e8e008122c6ff69c8.png)
(Ⅰ)若线段
的长为
,求直线
的方程;
(Ⅱ)在
上是否存在点
,使得对任意直线
,直线
,
,
的斜率始终成等差数列,若存在求点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2016/10/10/1573062394052608/1573062399696896/STEM/95963af0cdf7431e8e008122c6ff69c8.png)
(Ⅰ)若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(Ⅱ)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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2016-12-03更新
|
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7卷引用:【新东方】杭州新东方高中数学试卷327
(已下线)【新东方】杭州新东方高中数学试卷327(已下线)2015届浙江省嘉兴市桐乡第一中学高三新高考调研二理科数学试卷2014-2015学年浙江省台州中学高二上学期第二次统练文科数学试卷2017届河北省五个一名校联盟高三上学期一模数学(文)试卷2017届江西师大附中高三10月月考数学(文)试卷2016-2017学年河北定州市高二上学期期中数学试卷2017届河北省五个一联盟(石家庄一中、保定一中等)高三上学期第一次模拟考试数学(文)试卷