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1 . 鱼腹式吊车梁中间截面大,逐步向梁的两端减小,形状像鱼腹.如图,鱼腹式吊车梁的鱼腹部分
是抛物线的一部分,其宽为
,高为
,根据图中的坐标系,则该抛物线的焦点坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f10e2c9147e2b6617c9aee21f88521fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad0bad6b9dc24eb33ae7b34d059941b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/554652fc-cd4e-4e2a-8989-a98e17767854.png?resizew=242)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-12-12更新
|
287次组卷
|
6卷引用:河南省创新发展联盟2023-2024学年高二上学期第四次联考(12月)数学试题
2 . 已知过抛物线
的焦点
的直线与抛物线
交于
,
两点(
在第一象限),
是以
为直径的圆
与抛物线
的准线的公共点.若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb7b76d897de678faaf8221bafe217d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7cc17eff62057126f3014be270751b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bee8e70f1fab639be1636c7bce0477.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 已知点
,
,直线
的斜率为
,直线
的斜率为
,若
,则点
的轨迹为不包含
,
两点的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd99c5000629d7f49499d666e68f40d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852b303689c31189cd47bb4a3220f9fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a8a3f8056784c054b27a970472b506b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.直线 | B.椭圆 | C.双曲线 | D.抛物线 |
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解题方法
4 . 已知点
是抛物线
的焦点,点
,且点
为抛物线
上任意一点,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dcd728f234485ea270308771a78ef51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82ea1be9b9b6bb12afa7e1ce703d1603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2b337c32bd5408c0ed8a9ee9cde4cad.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/2e791dbae6abeea3ff6613db8d21f8ae.png)
A.7 | B.6 | C.5 | D.4 |
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2023-12-07更新
|
1030次组卷
|
3卷引用:四川省绵阳市南山中学2024届高三上学期12月月考数学(理)试题
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5 . 如图是某景区内的一座抛物线拱形大桥,该桥抛物线拱形部分的桥面跨度为10米,拱形最高点与水面的距离为6米,为增加景区的夜晚景色,景区计划在拱形桥的焦点处悬挂一闪光灯,则竖直悬挂的闪光灯到水面的距离为( )(结果精确到0.01)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/7e32fac2-eb7c-4cc9-ab22-15913c45fc15.png?resizew=155)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/7e32fac2-eb7c-4cc9-ab22-15913c45fc15.png?resizew=155)
A.4.96 | B.5.06 | C.4.26 | D.3.68 |
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2023-12-01更新
|
384次组卷
|
7卷引用:四川省德阳市德阳中学校2023-2024学年高二上学期11月月考数学试题
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6 . 已知抛物线
的准线方程为
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075e347ba421bb4db35ae2e9f3150b37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.1 | B.2 | C.4 | D.8 |
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2023-11-26更新
|
756次组卷
|
3卷引用:江苏省淮安市2023-2024学年高二上学期11月期中数学试题
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7 . 倍立方问题是古希腊三大几何问题之一.倍立方问题是指给定一个棱长为
的正方体,作另一个正方体,使得这个正方体体积是原来正方体体积的两倍(即给出长度为
的线段).古希腊数学家梅内克缪斯采用了抛物线的工具研究倍立方问题:在平面直角坐标系上,画出抛物线
(
)和抛物线
(
),使得这两个抛物线的其中一个交点横坐标为
,则
的值应取为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8555db2e112c4c37c4056d479db35735.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42b7d2f8fe4b0a1adff5c78961734bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b35f0b940c8422ef47edc3b7ce55e47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5abd313d4e92a762fb7fb0c1cb65263d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8555db2e112c4c37c4056d479db35735.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
8 . 设抛物线:
(
)的焦点为
,若点
在
上,则
( )
A.![]() | B.![]() | C.![]() | D.![]() |
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9 . 若抛物线
的焦点坐标为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071d4c1556de22088445f191a80b8a25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c76c41773aae617db1c0cc04bcf836f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
A.-10 | B.-20 | C.10 | D.20 |
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10 . 如果抛物线
的准线是直线
,那么它的焦点坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f773e2ceaff0e2c54b432b649f2411f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次