如图,已知抛物线
上的点R的横坐标为1,焦点为F,且
,过点
作抛物线C的两条切线,切点分别为A、B,D为线段PA上的动点,过D作抛物线的切线,切点为E(异于点A,B),且直线DE交线段PB于点H.
![](https://img.xkw.com/dksih/QBM/2022/3/14/2928219490795520/2937393360322560/STEM/e404ed73b77d443ea08d92e79e7c1b5d.png?resizew=214)
(1)求抛物线C的方程;
(2)(i)求证:
为定值;
(ii)设
,
的面积分别为
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/038f8c43f8fa99611a40c95cf8899a28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a297f399ee48fe07cd6aacc935a1c46.png)
![](https://img.xkw.com/dksih/QBM/2022/3/14/2928219490795520/2937393360322560/STEM/e404ed73b77d443ea08d92e79e7c1b5d.png?resizew=214)
(1)求抛物线C的方程;
(2)(i)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1489a936094d62ca200619405600fc9a.png)
(ii)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cb3e973f4e9361e1d23a0ab56006d12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0772d9749b86a3bf342bdc7439235f57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76b982b4ed3b75609bda6af3914986d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e07766b05d49e01c0a3b832c4c8075b.png)
21-22高三下·浙江·开学考试 查看更多[6]
浙江省名校协作体2022届高三下学期开学考数学试题(已下线)思想01 函数与方程思想(练)--第三篇 思想方法篇-《2022年高考数学二轮复习讲练测(浙江专用)》浙江省名校协作体2022届高三下学期3月联考数学试题(已下线)数学-2022年高考考前押题密卷(浙江卷)(已下线)专题37 阿基米德三角形(已下线)重难点突破14 阿基米德三角形 (七大题型)
更新时间:2022-03-16 12:05:00
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解答题-证明题
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解题方法
【推荐1】已知抛物线
的焦点为F,点P在抛物线E上,点P的横坐标为1,且
是抛物线E上异于O的两点.
(1)求抛物线E的标准方程;
(2)若直线
的斜率之积为
,求证:直线
恒过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e668490ce77f3ad2ff60f7501e40a064.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca76cc5edfaf26511d3b1c35c92604d7.png)
(1)求抛物线E的标准方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5a5e484dfef494d27bc35ae7b8cf75d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edbd40e04e2a943051fa83d6e511add.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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(0.4)
【推荐2】已知抛物线
:
过点
,
为其焦点,过
且不垂直于
轴的直线
交抛物线
于
,
两点,动点
满足
的垂心为原点
.
(1)求抛物线
的方程;
(2)求证:动点
在定直线
上,并求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21be4ca5919e23d17c902a3b09b0f0bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071db3989cd0f9f4f32fa22b27676172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53502463cc76201000e02df314e58769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)求证:动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce02eb48d8c3c2feee04174d9af08cf.png)
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解答题-问答题
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较难
(0.4)
解题方法
【推荐1】如图,已知抛物线
的焦点为
,
为
轴上位于
右侧的点,点
为抛物线
在第一象限上的一点,且
,分别延长线段
、
交抛物线
于
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/623dfa51-fb86-46d1-91bc-f0e618d4c2b8.png?resizew=184)
(1)若
,求直线
的斜率;
(2)求三角形
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092fd1b1d33979818300cd2e3699bff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/407e84847efc4dbfd0763e42eed965c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/623dfa51-fb86-46d1-91bc-f0e618d4c2b8.png?resizew=184)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f721340387f17c4331a5f07a97f7025a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(2)求三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
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【推荐2】高三十二班同学设计了一个如图所示的“蝴蝶形图案”(阴影区域)来预示在6月的高考中,同学们展翅高飞,其中
是过抛物线
的焦点
的两条弦,且
,点
为
轴上一点,记
,其中
为锐角.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/02dc7579-9d8e-4145-a9cd-b7511580a729.png?resizew=217)
(1)求抛物线的方程;
(2)当“蝴蝶形图案”的面积最小时,求
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fdb88db185cf531b024327017fb0be4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5327879c0e56298c5430a5e466be4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/02dc7579-9d8e-4145-a9cd-b7511580a729.png?resizew=217)
(1)求抛物线的方程;
(2)当“蝴蝶形图案”的面积最小时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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【推荐1】已知抛物线
的准线经过点
,过点
的直线l与抛物线C有两个不同的交点A,B,点
(其中
)在抛物线C上,且直线PA交y轴于M,直线PB交y轴于N.
(1)求直线l斜率的取值范围;
(2)设O为原点,若
,
,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0037eb5cb1ad4865f51c75de90d0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/203b64e2a9e4ac8bdfb1b541597f7119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dda1d7b3982b398ffa32f3dbfdfe787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4c78214e43a8b93f2a57072033cbcf.png)
(1)求直线l斜率的取值范围;
(2)设O为原点,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf235268ea182e3785101b44e74df3e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/762af77333604db19016178d2217adb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587b693b82241eb9c32cdbb96c209f33.png)
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【推荐2】已知点
在抛物线
上,过点
的直线
与抛物线C有两个不同的交点A、B,且直线PA交
轴于M,直线PB交
轴于N.
(1)求抛物线C的方程;
(2)求直线
的斜率的取值范围;
(3)设O为原点,
,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dbcf0320d94734aedd3d4e2e31b9827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df40ba57bb5819b4aaa38d514500052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e241c20dbb4f324b6491da9f75222c9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)求抛物线C的方程;
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(3)设O为原点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f3bcded929b9721b2a6bf6c7b7d9f26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e56d50608555df47a56f8771af6e99.png)
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