名校
1 . 设抛物线
的焦点为
,点
在此抛物线上且横坐标为
,则
等于( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3577bf250e9110428ff34f518fbd9f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4392b26f9107a7c7a475e8abcef093c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-06-21更新
|
1285次组卷
|
7卷引用:浙江省宁波四中2019-2020学年高二上学期期中数学试题
名校
解题方法
2 . 如图,点
在抛物线
上,抛物线的焦点为
,且
,直线
交抛物线于B,C两点(C点在第一象限),过点C作y轴的垂线分别交直线
,
于点P,Q,记
,
的面积分别为
,
.
![](https://img.xkw.com/dksih/QBM/2022/4/20/2962267838799872/2964160713646080/STEM/fed6b3c7-5e38-472b-98c0-a2439d8956a7.png?resizew=248)
(1)求
的值及抛物线的方程;
(2)当
时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a93dd62e4f030b660eb45bb033d2a6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b35f0b940c8422ef47edc3b7ce55e47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a499bb7ab9d720e663ec50f9355469d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f616752f1b1dc6235262f4bba95d71af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28dfc72e3ecc3e042e3a9582935af07a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147de24f071e316b68fd2e78e3c84545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://img.xkw.com/dksih/QBM/2022/4/20/2962267838799872/2964160713646080/STEM/fed6b3c7-5e38-472b-98c0-a2439d8956a7.png?resizew=248)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a4eaa80b44625890339d6a0065c241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
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3 . 过抛物线
焦点的直线交抛物线于
两点,已知
,
为原点,则
重心的纵坐标为________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108c18cb76d7d34b05c991a644c8b136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/625abc7a8ffdb1c3b2fc924bcd8f6bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8189f7b0ffe4d20bf0fad43b4ed589.png)
您最近一年使用:0次
解题方法
4 . 如图所示,
,
是焦点为
的抛物线
上的两动点,线段
的中点
在定直线
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/337f1451-4251-469b-ad65-e0c205913f5f.png?resizew=119)
(1)求
的值;
(2)求
的最大值.
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c716601286ac3ef51a4c3c16b12e260.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/337f1451-4251-469b-ad65-e0c205913f5f.png?resizew=119)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482592d5ea697cc7d8a67e3051cdf491.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
您最近一年使用:0次
5 . 以下说法正确的是( )
A.以![]() ![]() ![]() |
B.已知![]() ![]() ![]() ![]() |
C.抛物线![]() ![]() ![]() |
D.双曲线![]() ![]() ![]() |
您最近一年使用:0次
名校
6 . 如图,正方体
中,
是上底面
内一点,点
,
在直线
上运动,若直线
和
所成角的最小值与直线
和平面
所成角的最大值相等,则满足条件的点
的轨迹是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/aa2d06eb-be4b-4ea5-b709-50be54d5dbd7.png?resizew=170)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/aa2d06eb-be4b-4ea5-b709-50be54d5dbd7.png?resizew=170)
A.直线的一部分 | B.圆的一部分 |
C.椭圆的一部分 | D.抛物线的一部分 |
您最近一年使用:0次
名校
7 . 已知抛物线
:
,
为抛物线
上的任意一点,以
为圆心的圆始终与直线
相切,则圆
过定点___________ .
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
名校
8 . 设抛物线
的焦点为F,准线为l,P为抛物线上一点,
,垂足为A,如果
为正三角形,那么
等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0261104a7c308433a0c0508ff20ea29a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb50782b4a4f59f8798a90086b0d5c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceff3844281849df3e37a2e56e110549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac654a052f98d1ccb7fede1f122cec3.png)
A.![]() | B.![]() | C.6 | D.12 |
您最近一年使用:0次
2019-04-26更新
|
767次组卷
|
3卷引用:【全国百强校】浙江省嘉兴市第一中学、湖州中学2018-2019学年高二下学期期中考试数学试题
名校
9 . 小明同学在一个宽口半径为1,高度为1的抛物面杯子做小球放入实验,要求小球能与杯底接触,他能放入小球的最大半径是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/feef07f7-3c91-4087-8a2a-828b1a2c2dbe.png?resizew=146)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/feef07f7-3c91-4087-8a2a-828b1a2c2dbe.png?resizew=146)
A.![]() | B.![]() | C.![]() | D.1 |
您最近一年使用:0次
10 . 一动圆过点(0,1)且与定直线l相切,圆心在抛物线
上,则l的方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次