已知O为坐标原点,抛物线E:
的焦点F到准线l的距离为2.
(1)求p;
(2)若A,B,C为E上不同的三点,且
,直线AB,FC分别与l交于点M,N,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c2f156b05838deaae6a35acad242af.png)
(1)求p;
(2)若A,B,C为E上不同的三点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af4e9d2b511b7ef084f9cc47e0c398dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7db9b4ac9106bfaf32eba6ae265872b.png)
22-23高三上·江苏南京·期末 查看更多[2]
更新时间:2023-03-07 19:03:17
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解答题-问答题
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困难
(0.15)
【推荐1】一青蛙从点
开始依次水平向右和竖直向上跳动,其落点坐标依次是
,(如图,
的坐标以已知条件为准),
表示青蛙从点
到点
所经过的路程.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/220d0549-124f-4dc9-b590-7ce2b6b0a176.png?resizew=157)
(1)点
为抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc58c62444bf42a25289c45425a00f2.png)
准线上一点,点
,
均在该抛物线上,并且直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
经过该抛物线的焦点,证明
;
(2)若点
要么落在
所表示的曲线上,要么落在
所表示的曲线上,并且
,试写出
(不需证明);
(3)若点
要么落在
所表示的曲线上,要么落在
所表示的曲线上,并且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/058f5d00375f8083ff14dcf3745e4268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/801c40c4b1b8b4155ccf08fc8df59342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/058f5d00375f8083ff14dcf3745e4268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7356ec98b600ece41f3a6b4bc26a7d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/220d0549-124f-4dc9-b590-7ce2b6b0a176.png?resizew=157)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/058f5d00375f8083ff14dcf3745e4268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc58c62444bf42a25289c45425a00f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75ed10db4b9747a4b6d865b774f6b6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cfbb8b3c14e9617655321cab31acebc.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5661e7739636a3ff1479ab6a807d19b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0379cdb1fbe207a32568a978947fa41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2e53542ad942e269a580a4dc7cc6fef.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf11327fc262b1351099455f6b9eed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02fa322f632dcd72048918b616511ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d55d2201d4d9aa7846b17a249ac528b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de918291423d4f2126ac8cc7d4b9edf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772e1830de8a5b2bede8f5614d93a1d2.png)
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解答题-问答题
|
困难
(0.15)
解题方法
【推荐2】已知抛物线
的焦点
关于原点的对称点是
为
为圆心,
为半径的圆.直线
是过
上异于原点的一点
的
的切线,切点为
.
(1)求
的最大值;
(2)求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/476e960b0c485b855bfcf5e17369f48d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06bbf1f42f0caeb7ab44281c07bc8c68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e00eb9ed89b33f218fbdff9b76a8cd17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b59b61e07af95ad8b7e34cadedc9ead.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dbd0ecf66cbb83572ab4a9e5938ea3.png)
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解答题-问答题
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困难
(0.15)
名校
解题方法
【推荐1】已知点
是抛物线
上不同三点,直线
与抛物线
相切.
(1)若直线
的斜率为2,线段
的中点为
,求
的方程;
(2)若
为定值,当
变动时,判断
是否为定值,若为定值,求出该定值;若不为定值,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35644a7d25d0410409238f52c8818083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e39bd21af422662049290a3aa4841b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e325d1e4485ec4cfb3d7bb038d675d7d.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18fe48905f1e58b2fe08706c2f53b55c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13d726b14a313e000a81526162f35748.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3c5a4887dfe02b02ee90d740151e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1835c6f51b4471243b5e1a3d6e74c203.png)
您最近一年使用:0次
解答题-问答题
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困难
(0.15)
名校
解题方法
【推荐2】已知动圆
与直线
相切,且与圆
外切.
(1)求动圆
的圆心轨迹
的方程;
(2)过点
且斜率为
的直线与轨迹
交于A,
两点,点
,延长
,
分别与轨迹
交于
,
两点,设
的斜率为
,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76bb47ff3519a1171c98ead50f8027b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae5ce71568a10700c5d9e813fa8e6c49.png)
(1)求动圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b392a72e21bb178cd0dd64d681c56a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451fc6e4248b63e70595f23842f06c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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