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解题方法
1 . 如图所示,红星高级中学要在一块扇形空地上修建一个矩形花园,矩形
的四个顶点均在边界上,扇形
的半径
,
,
,
,
分别交
于
,
.
时,求边
的长;
(2)当矩形
的面积
取最大值时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e6feccb6113e9aa32fdd4dc169e95e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1eb76fe74cba30f7cbcde349ba80da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a56dba4e984e1c7bfc20dd2340e929.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d5a52b8d415fcbf4f22187ecde4b41c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)当矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caa9c3aaf46da69f39fc5328a70daf5c.png)
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2 . 在平面直角坐标系
中,定义向量
为函数
的有序相伴向量.
(1)设
为函数
的有序相伴向量,求实数
的值;
(2)若
的有序相伴向量为
,若函数
,
与直线
有且仅有四个不同的交点,求实数
的取值范围;
(3)将(1)中所得函数
的图象向左平移
得到函数
.已知
,
,请问在函数
图象上是否存在一点
,使得
成立.若存在,求出
点的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0945d4c70ece41de53a8c910a45607a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/651055fdc939ef20d1e92e82e6b32f36.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf624e31f9cdf697fcafa55d7f0d5cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9616f809e87cdd1adc5e623008a3af9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557c1a8dbeeb137f8e8631058df5e1e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6135c9808e151ef160d8b9e833434b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b604c6522119e77c1cb16b91532a2c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead6a3dbd03539ef5e0807be57bb1e17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)将(1)中所得函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efb486a2e713246204f62cd6f19b5ef1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772d1b3c6d3a815b9d6b78cf9480338e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc52054fdb9b146bbc9fda376f7a2874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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2022高三·全国·专题练习
3 . 如图,中心在原点
的椭圆
的右焦点为
,长轴长为
.椭圆
上有两点
、
,连接
、
,记它们的斜率为
、
,且满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/baa6db7f-47c5-470a-b427-305483b59662.png?resizew=229)
(1)求椭圆
的标准方程;
(2)求证:
为一定值,并求出这个定值;
(3)设直线
与椭圆
的另一个交点为
,直线
和
分别与直线
交于点
、
,若
和
的面积相等,求点
的横坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967dc76338e277e690e0e524d4179e1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.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/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/023037c7a3e31ba698c39f9b52db2515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/157a01e29b471bbcae32d0e129a5b14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93f1438d9a45a9561fba2183ee1c1a2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/baa6db7f-47c5-470a-b427-305483b59662.png?resizew=229)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5f6c5fd93aed88bec58002a20ea2e90.png)
(3)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42af8cdea9c5269c17aebb086afdd136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1b05c3b58de848e6a33cb450fd39776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c28abb154f41e1ca9816c9c9c2433ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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4卷引用:四川省巴中市恩阳区2022-2023学年高二上学期期末数学试题
四川省巴中市恩阳区2022-2023学年高二上学期期末数学试题(已下线)专题12平面解析几何必考题型分类训练-4广东省广州市四校联考2022-2023学年高二上学期期中数学试题上海市曹杨第二中学2023届高三模拟数学试题
名校
解题方法
4 . 过
的直线l与抛物线E:
交于
,
两点,且与E的准线交于点C,点F是E的焦点,若
的面积是
的面积的3倍,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a29ba49963134a7232fa8574105fc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e8953ded144195804384dcb494d5e2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fb6e81fee5674c3e26a65e58cc506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6830ebecddbd9759be626289c408e4f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97dad16e4910ec15add074c4077b0e86.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2022-01-18更新
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2卷引用:四川省通江中学2021-2022学年高二下学期入学考试理科数学试题