新高考数学一轮复习分层提升练习第45练 抛物线及其性质(原卷版)_第1页
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第45练抛物线及其性质(精练)刷真题明导向刷真题明导向一、单选题1.已知抛物线SKIPIF1<0的焦点为SKIPIF1<0,点SKIPIF1<0在SKIPIF1<0上.若SKIPIF1<0到直线SKIPIF1<0的距离为5,则SKIPIF1<0(

)A.7 B.6 C.5 D.42.设F为抛物线SKIPIF1<0的焦点,点A在C上,点SKIPIF1<0,若SKIPIF1<0,则SKIPIF1<0(

)A.2 B.SKIPIF1<0 C.3 D.SKIPIF1<03.抛物线SKIPIF1<0的焦点到直线SKIPIF1<0的距离为SKIPIF1<0,则SKIPIF1<0(

)A.1 B.2 C.SKIPIF1<0 D.4二、填空题4.已知点SKIPIF1<0在抛物线C:SKIPIF1<0上,则A到C的准线的距离为.三、双空题5.已知抛物线SKIPIF1<0的焦点为SKIPIF1<0,点SKIPIF1<0在抛物线上,SKIPIF1<0垂直SKIPIF1<0轴与于点SKIPIF1<0.若SKIPIF1<0,则点SKIPIF1<0的横坐标为;SKIPIF1<0的面积为.【A组

】一、单选题1.两抛物线SKIPIF1<0与SKIPIF1<0的焦点间的距离为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<02.抛物线SKIPIF1<0的准线方程是SKIPIF1<0,则实数SKIPIF1<0的值(

)A.SKIPIF1<0 B.SKIPIF1<0 C.8 D.SKIPIF1<03.抛物线SKIPIF1<0的焦点坐标为(

)A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<04.石拱桥是世界桥梁史上出现较早、形式优美、结构坚固的一种桥型.如图,这是一座石拱桥,桥洞弧线可近似看成是顶点在坐标原点,焦点在y轴负半轴上的抛物线C的一部分,当水距离拱顶4米时,水面的宽度是8米,则抛物线C的焦点到准线的距离是(

A.1米 B.2米 C.4米 D.8米5.焦点坐标为SKIPIF1<0的抛物线的标准方程是(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<06.已知抛物线SKIPIF1<0的焦点为SKIPIF1<0,点SKIPIF1<0在SKIPIF1<0上.若SKIPIF1<0到直线SKIPIF1<0的距离为3,则SKIPIF1<0(

)A.4 B.5 C.6 D.77.抛物线SKIPIF1<0的焦点到圆SKIPIF1<0上点的距离的最大值为(

)A.6 B.2 C.5 D.88.已知抛物线的焦点在SKIPIF1<0轴上,且焦点到坐标原点的距离为1,则抛物线的标准方程为(

)A.SKIPIF1<0 B.SKIPIF1<0或SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<0或SKIPIF1<09.已知圆SKIPIF1<0与抛物线SKIPIF1<0的准线相切,则SKIPIF1<0(

)A.SKIPIF1<0 B.SKIPIF1<0 C.8 D.210.O为坐标原点,F为抛物线SKIPIF1<0的焦点,M为C上一点,若SKIPIF1<0,则SKIPIF1<0的面积为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.811.已知抛物线C:SKIPIF1<0的顶点为O,经过点SKIPIF1<0,且F为抛物线C的焦点,若SKIPIF1<0,则p=(

)A.SKIPIF1<0 B.1 C.SKIPIF1<0 D.212.已知抛物线SKIPIF1<0:SKIPIF1<0的焦点为SKIPIF1<0,抛物线SKIPIF1<0上有一动点SKIPIF1<0,且SKIPIF1<0,则SKIPIF1<0的最小值为(

)A.8 B.16 C.11 D.2613.过抛物线SKIPIF1<0的焦点SKIPIF1<0且倾斜角为锐角的直线SKIPIF1<0与SKIPIF1<0交于SKIPIF1<0两点,过线段SKIPIF1<0的中点SKIPIF1<0且垂直于SKIPIF1<0的直线与SKIPIF1<0的准线交于点SKIPIF1<0,若SKIPIF1<0,则SKIPIF1<0的斜率为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.1 D.214.设抛物线SKIPIF1<0的焦点为SKIPIF1<0,准线为SKIPIF1<0,过第一象限内的抛物线上一点SKIPIF1<0作SKIPIF1<0的垂线,垂足为SKIPIF1<0,设SKIPIF1<0,且SKIPIF1<0为等边三角形,SKIPIF1<0的面积为SKIPIF1<0,则SKIPIF1<0(

)A.1 B.SKIPIF1<0 C.SKIPIF1<0 D.215.已知抛物线SKIPIF1<0的焦点为SKIPIF1<0,过SKIPIF1<0的直线交抛物线于SKIPIF1<0、SKIPIF1<0两点,若SKIPIF1<0,则SKIPIF1<0的中点到准线的距离为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<016.已知抛物线SKIPIF1<0的焦点为SKIPIF1<0,圆SKIPIF1<0(SKIPIF1<0)经过点F,且圆心SKIPIF1<0在抛物线上,则实数SKIPIF1<0等于(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<017.已知抛物线SKIPIF1<0的焦点为F,点P在C上,若点SKIPIF1<0,则SKIPIF1<0周长的最小值为(

).A.13 B.12 C.10 D.8【答案】A18.已知F为抛物线SKIPIF1<0的焦点,P为该抛物线上的动点,点SKIPIF1<0,则SKIPIF1<0的最大值为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.2 D.SKIPIF1<0二、多选题19.已知抛物线SKIPIF1<0的焦点为SKIPIF1<0,点SKIPIF1<0在抛物线SKIPIF1<0上,若SKIPIF1<0为坐标原点,则(

)A.点SKIPIF1<0的坐标为SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<020.已知抛物线C:SKIPIF1<0的焦点为F,其准线l与x轴交于点P,过C上一点M作l的垂线,垂足为Q,若四边形MQPF为矩形,则(

)A.准线l的方程为SKIPIF1<0 B.矩形MQPF为正方形C.点M的坐标为SKIPIF1<0 D.点M到原点O的距离为SKIPIF1<021.(多选)设斜率为2的直线l过抛物线SKIPIF1<0的焦点F,且和y轴交于点A,若SKIPIF1<0(O为坐标原点)的面积为4,则抛物线方程为(

)A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<022.已知抛物线SKIPIF1<0的焦点为SKIPIF1<0,顶点为SKIPIF1<0,点SKIPIF1<0在抛物线SKIPIF1<0上,若SKIPIF1<0,则(

)A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<023.设SKIPIF1<0为抛物线SKIPIF1<0:SKIPIF1<0(SKIPIF1<0)的焦点,SKIPIF1<0为坐标原点,SKIPIF1<0为SKIPIF1<0上一点,且SKIPIF1<0,则(

)A.SKIPIF1<0B.SKIPIF1<0C.直线SKIPIF1<0的斜率为SKIPIF1<0D.SKIPIF1<0的面积为SKIPIF1<024.设抛物线SKIPIF1<0,SKIPIF1<0为其焦点,SKIPIF1<0为抛物线上一点.则下列结论正确的是(

)A.若SKIPIF1<0,则SKIPIF1<0B.若SKIPIF1<0点到焦点的距离为3,则SKIPIF1<0的坐标为SKIPIF1<0.C.若SKIPIF1<0,则SKIPIF1<0的最小值为SKIPIF1<0.D.过焦点SKIPIF1<0作斜率为2的直线与抛物线相交于SKIPIF1<0,SKIPIF1<0两点,则SKIPIF1<025.已知抛物线C:SKIPIF1<0的焦点为SKIPIF1<0点SKIPIF1<0在SKIPIF1<0上,且弦SKIPIF1<0的中点到直线SKIPIF1<0的距离为5,则(

)A.SKIPIF1<0 B.线段SKIPIF1<0的长为定值C.SKIPIF1<0两点到SKIPIF1<0的准线的距离之和为14 D.SKIPIF1<0的最大值为4926.已知抛物线SKIPIF1<0:SKIPIF1<0的焦点为SKIPIF1<0,SKIPIF1<0为SKIPIF1<0上一点,且SKIPIF1<0,直线SKIPIF1<0交SKIPIF1<0于另一点SKIPIF1<0,记坐标原点为SKIPIF1<0,则(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<027.已知抛物线SKIPIF1<0:SKIPIF1<0的焦点为SKIPIF1<0,SKIPIF1<0为SKIPIF1<0上一点,下列说法正确的是(

)A.SKIPIF1<0的准线方程为SKIPIF1<0B.直线SKIPIF1<0与SKIPIF1<0相切C.若SKIPIF1<0,则SKIPIF1<0的最小值为SKIPIF1<0D.若SKIPIF1<0,则SKIPIF1<0的周长的最小值为1128.已知双曲线SKIPIF1<0的左、右焦点分别为SKIPIF1<0,抛物线SKIPIF1<0的焦点与双曲线C的一个焦点重合,点P是这两条曲线的一个公共点,则下列说法正确的是(

)A.SKIPIF1<0 B.SKIPIF1<0的周长为16C.SKIPIF1<0的面积为SKIPIF1<0 D.SKIPIF1<0三、填空题29.已知抛物线SKIPIF1<0上有一动点SKIPIF1<0,则SKIPIF1<0与点SKIPIF1<0距离的最小值为.30.设抛物线SKIPIF1<0(SKIPIF1<0)的准线与直线SKIPIF1<0的距离为3,则抛物线的标准方程为.31.若抛物线SKIPIF1<0上一点SKIPIF1<0到焦点的距离是该点到SKIPIF1<0轴距离的SKIPIF1<0倍,则SKIPIF1<0.32.已知抛物线SKIPIF1<0上的点到准线的最小距离为SKIPIF1<0,则抛物线的焦点坐标为.33.已知抛物线C的方程为SKIPIF1<0,若倾斜角为锐角的直线l过抛物线的焦点F,与抛物线交于A,B两点,且SKIPIF1<0,则直线l的倾斜角为.34.已知抛物线SKIPIF1<0:SKIPIF1<0的焦点为SKIPIF1<0,设点SKIPIF1<0在抛物线SKIPIF1<0上,若以线段SKIPIF1<0为直径的圆过点SKIPIF1<0,则SKIPIF1<0.35.已知抛物线SKIPIF1<0的准线为SKIPIF1<0,圆SKIPIF1<0与SKIPIF1<0相切,则抛物线SKIPIF1<0的焦点坐标为.36.设SKIPIF1<0是抛物线SKIPIF1<0的焦点,SKIPIF1<0是抛物线上的两点,线段SKIPIF1<0的中点SKIPIF1<0的坐标为SKIPIF1<0,若SKIPIF1<0,则实数SKIPIF1<0的值为.37.抛物线SKIPIF1<0的焦点为SKIPIF1<0,过SKIPIF1<0上一点SKIPIF1<0作SKIPIF1<0的准线SKIPIF1<0的垂线,垂足为SKIPIF1<0,若直线SKIPIF1<0的斜率为-2,则SKIPIF1<0的面积为.38.已知抛物SKIPIF1<0的焦点为F,准线为l,点P在C上,直线PF交y轴于点Q,若SKIPIF1<0,则P到准线l的距离为.39.已知抛物线SKIPIF1<0的SKIPIF1<0的准线与SKIPIF1<0轴交于SKIPIF1<0点,SKIPIF1<0,SKIPIF1<0是SKIPIF1<0的焦点,SKIPIF1<0是SKIPIF1<0上一点,SKIPIF1<0,则SKIPIF1<0.40.抛物线SKIPIF1<0的焦点为SKIPIF1<0,准线为SKIPIF1<0,点SKIPIF1<0是抛物线上一点,且SKIPIF1<0(SKIPIF1<0为坐标原点),SKIPIF1<0,垂足为SKIPIF1<0,则SKIPIF1<0的面积是.【B组】一、单选题1.如图,太阳灶是一种将太阳光反射至一点用来加热水或食物的设备,上面装有抛物面形的反光镜,镜的轴截面是抛物线的一部分,已知太阳灶的口径(直径)为4m,深度为0.5m,则该抛物线顶点到焦点的距离为(

A.0.25m B.0.5m C.1m D.2m2.设O为坐标原点,F为抛物线C:SKIPIF1<0的焦点,直线SKIPIF1<0与抛物线C交于A,B两点,若SKIPIF1<0,则抛物线C的准线方程为(

)A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0或SKIPIF1<0 D.SKIPIF1<0或SKIPIF1<03.若点SKIPIF1<0在焦点为SKIPIF1<0的抛物线SKIPIF1<0上,且SKIPIF1<0,点SKIPIF1<0为直线SKIPIF1<0上的动点,则SKIPIF1<0的最小值为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.44.抛物线SKIPIF1<0的顶点为原点,焦点为SKIPIF1<0,则点SKIPIF1<0到抛物线SKIPIF1<0上动点SKIPIF1<0的距离最小值为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<05.已知抛物线SKIPIF1<0的顶点为O,焦点为F,准线为直线l,点E在抛物线上.若E在直线l上的射影为Q,且Q在第四象限,SKIPIF1<0,则直线FE的倾斜角为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0或SKIPIF1<0 D.SKIPIF1<0或SKIPIF1<06.已知抛物线SKIPIF1<0的焦点为F,点SKIPIF1<0,若点A为抛物线任意一点,当SKIPIF1<0取最小值时,点A的坐标为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<07.已知抛物线SKIPIF1<0的焦点为SKIPIF1<0,准线为SKIPIF1<0,点SKIPIF1<0是抛物线SKIPIF1<0上一点,SKIPIF1<0于SKIPIF1<0.若SKIPIF1<0,则抛物线SKIPIF1<0的方程为(

)A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<08.直线SKIPIF1<0经过抛物线SKIPIF1<0的焦点SKIPIF1<0,且与抛物线交于SKIPIF1<0,SKIPIF1<0两点.若SKIPIF1<0,则SKIPIF1<0(

)A.4 B.SKIPIF1<0 C.8 D.SKIPIF1<09.已知抛物线SKIPIF1<0的焦点为SKIPIF1<0,点SKIPIF1<0,线段SKIPIF1<0与抛物线SKIPIF1<0相交于点SKIPIF1<0,若抛物线SKIPIF1<0在点SKIPIF1<0处的切线与直线SKIPIF1<0垂直,则抛物线SKIPIF1<0的方程为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<010.已知抛物线SKIPIF1<0的焦点为SKIPIF1<0,点SKIPIF1<0为抛物线上一点,过点SKIPIF1<0作抛物线的准线的垂线,垂足为SKIPIF1<0,若SKIPIF1<0,SKIPIF1<0的面积为SKIPIF1<0,则SKIPIF1<0(

)A.2 B.8 C.SKIPIF1<0 D.411.过抛物线SKIPIF1<0的焦点SKIPIF1<0的直线SKIPIF1<0交SKIPIF1<0于SKIPIF1<0两点,若直线SKIPIF1<0过点SKIPIF1<0,且SKIPIF1<0,则抛物线SKIPIF1<0的准线方程是(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<012.已知抛物线SKIPIF1<0上三点SKIPIF1<0、SKIPIF1<0、SKIPIF1<0,直线SKIPIF1<0、SKIPIF1<0是圆SKIPIF1<0的两条切线,则直线SKIPIF1<0的方程为(

)A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<013.在平面直角坐标系SKIPIF1<0中,抛物线SKIPIF1<0为SKIPIF1<0轴正半轴上一点,线段SKIPIF1<0的垂直平分线SKIPIF1<0交SKIPIF1<0于SKIPIF1<0两点,若SKIPIF1<0,则四边形SKIPIF1<0的周长为(

)A.SKIPIF1<0 B.64 C.SKIPIF1<0 D.8014.已知抛物线SKIPIF1<0,F为抛物线的焦点,P为抛物线上一点,过点P作PQ垂直于抛物线的准线,垂足为Q,若SKIPIF1<0,则△PFQ的面积为(

)A.4 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<015.抛物线SKIPIF1<0的焦点为SKIPIF1<0,过SKIPIF1<0且倾斜角为SKIPIF1<0的直线SKIPIF1<0与抛物线SKIPIF1<0交于SKIPIF1<0,SKIPIF1<0两点,点SKIPIF1<0为抛物线SKIPIF1<0上的动点,且点SKIPIF1<0在SKIPIF1<0的右下方,则SKIPIF1<0面积的最大值为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<016.已知抛物线SKIPIF1<0的焦点为SKIPIF1<0,直线SKIPIF1<0与抛物线SKIPIF1<0交于SKIPIF1<0两点,SKIPIF1<0,线段SKIPIF1<0的中点为SKIPIF1<0,过点SKIPIF1<0作抛物线SKIPIF1<0的准线的垂线,垂足为SKIPIF1<0,则SKIPIF1<0的最小值为(

)A.1 B.SKIPIF1<0 C.2 D.SKIPIF1<0二、多选题17.直线SKIPIF1<0与抛物线SKIPIF1<0相交于A、B两点,下列说法正确的是(

)A.抛物线C的焦点是SKIPIF1<0 B.抛物线C的准线方程为SKIPIF1<0C.SKIPIF1<0 D.若SKIPIF1<0,SKIPIF1<0,则SKIPIF1<018.已知抛物线SKIPIF1<0的焦点为SKIPIF1<0,顶点为SKIPIF1<0,点SKIPIF1<0在抛物线SKIPIF1<0上,若SKIPIF1<0,则下列选项正确的是(

)A.SKIPIF1<0 B.以MF为直径的圆与SKIPIF1<0轴相切C.SKIPIF1<0 D.SKIPIF1<019.已知抛物线SKIPIF1<0:SKIPIF1<0的焦点SKIPIF1<0到准线的距离为2,过点SKIPIF1<0的直线与抛物线交于SKIPIF1<0,SKIPIF1<0两点,SKIPIF1<0为线段SKIPIF1<0的中点,SKIPIF1<0为坐标原点,则下列结论正确的是(

)A.此抛物线上与焦点SKIPIF1<0的距离等于3的点的坐标是SKIPIF1<0B.若SKIPIF1<0,则点SKIPIF1<0到SKIPIF1<0轴的距离为3C.SKIPIF1<0是准线上一点,SKIPIF1<0是直线SKIPIF1<0与SKIPIF1<0的一个交点,若SKIPIF1<0,则SKIPIF1<0D.SKIPIF1<020.已知抛物线SKIPIF1<0的准线为SKIPIF1<0,焦点为F,过点F的直线与抛物线交于SKIPIF1<0,SKIPIF1<0两点,SKIPIF1<0于SKIPIF1<0,则下列说法正确的是(

)A.若SKIPIF1<0,则SKIPIF1<0B.以PQ为直径的圆与准线l相切C.设SKIPIF1<0,则SKIPIF1<0D.过点SKIPIF1<0与抛物线C有且仅有一个公共点的直线至多有2条21.已知抛物线SKIPIF1<0的焦点为F,SKIPIF1<0,SKIPIF1<0是C上相异两点,则下列结论正确的是(

)A.若SKIPIF1<0,则SKIPIF1<0 B.若SKIPIF1<0,且SKIPIF1<0,则SKIPIF1<0C.若SKIPIF1<0,则SKIPIF1<0 D.若SKIPIF1<0,则SKIPIF1<0的最小值为SKIPIF1<022.设抛物线SKIPIF1<0的顶点为O,焦点为F.点M是抛物线上异于O的一动点,直线OM交抛物线的准线于点N,下列结论正确的是(

)A.若SKIPIF1<0,则O为线段MN的中点 B.若SKIPIF1<0,则SKIPIF1<0C.若SKIPIF1<0,则SKIPIF1<0 D.存在点M,使得SKIPIF1<0三、填空题23.若动点SKIPIF1<0到点SKIPIF1<0的距离比它到直线SKIPIF1<0的距离大1,则SKIPIF1<0的轨迹方程是.24.已知F是抛物线SKIPIF1<0的焦点,M是C上一点,FM的延长线交y轴于点N,若SKIPIF1<0,则SKIPIF1<025.已知抛物线SKIPIF1<0的焦点F到准线的距离为4,点SKIPIF1<0,SKIPIF1<0在抛物线C上,若SKIPIF1<0,则SKIPIF1<0.26.已知抛物线SKIPIF1<0(其中SKIPIF1<0)的焦点为SKIPIF1<0,点SKIPIF1<0在抛物线上,若SKIPIF1<0,且SKIPIF1<0的最小值为SKIPIF1<0,则点SKIPIF1<0到抛物线SKIPIF1<0的准线的距离为27.已知SKIPIF1<0为抛物线SKIPIF1<0上的动点,SKIPIF1<0为抛物线的焦点,点SKIPIF1<0,则SKIPIF1<0周长的最小值为.28.设抛物线SKIPIF1<0的焦点为SKIPIF1<0,点SKIPIF1<0,过点SKIPIF1<0的直线交SKIPIF1<0于SKIPIF1<0两点,直线SKIPIF1<0垂直SKIPIF1<0轴,SKIPIF1<0,则SKIPIF1<0.29.已知点SKIPIF1<0分别是抛物线SKIPIF1<0和圆SKIPIF1<0上的动点,点SKIPIF1<0到直线SKIPIF1<0的距离为SKIPIF1<0,则SKIPIF1<0的最小值为.30.已知点SKIPIF1<0为抛物线SKIPIF1<0上任意一点,点SKIPIF1<0为圆SKIPIF1<0上任意一点,点SKIPIF1<0,则SKIPIF1<0的最小值为.31.已知点SKIPIF1<0,点SKIPIF1<0在抛物线SKIPIF1<0上运动,点SKIPIF1<0在圆SKIPIF1<0上运动,则SKIPIF1<0的最小值.32.已知F是抛物线C:y2=4x的焦点,过点F的直线l与抛物线C交于A,B两点,过AB的中点M作y轴的垂线与抛物线在第一象限内交于点P,若SKIPIF1<0,则M点的横坐标为【C组

】一、单选题1.已知抛物线SKIPIF1<0过点SKIPIF1<0,其准线与SKIPIF1<0轴交于点SKIPIF1<0,直线SKIPIF1<0与抛物线的另一个交点为SKIPIF1<0,若SKIPIF1<0,则实数SKIPIF1<0为A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<02.SKIPIF1<0是抛物线SKIPIF1<0上一点,SKIPIF1<0是圆SKIPIF1<0关于直线SKIPIF1<0的对称曲线SKIPIF1<0上一点,则SKIPIF1<0的最小值是A.2 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<03.抛物线SKIPIF1<0与圆SKIPIF1<0交于SKIPIF1<0、SKIPIF1<0两点,圆心SKIPIF1<0,点SKIPIF1<0为劣弧SKIPIF1<0上不同于SKIPIF1<0、SKIPIF1<0的一个动点,平行于SKIPIF1<0轴的直线SKIPIF1<0交抛物线于点SKIPIF1<0,则SKIPIF1<0的周长的取值范围是A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<04.已知抛物线SKIPIF1<0的焦点为SKIPIF1<0,点SKIPIF1<0,SKIPIF1<0在抛物线SKIPIF1<0上,过线段SKIPIF1<0的中点SKIPIF1<0作抛物线SKIPIF1<0的准线的垂线,垂足为SKIPIF1<0,若SKIPIF1<0,则SKIPIF1<0的最小值为A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<05.已知抛物线SKIPIF1<0,圆SKIPIF1<0,若点SKIPIF1<0、SKIPIF1<0分别在SKIPIF1<0、SKIPIF1<0上运动,且设点SKIPIF1<0,则SKIPIF1<0的最小值为(

).A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<06.抛物线SKIPIF1<0的焦点为SKIPIF1<0,其准线与SKIPIF1<0轴的交点为SKIPIF1<0,过点SKIPIF1<0作直线与此抛物线交于SKIPIF1<0,SKIPIF1<0两点,若SKIPIF1<0,则SKIPIF1<0(

)A.3 B.4 C.5 D.67.设抛物线SKIPIF1<0(SKIPIF1<0)的焦点为SKIPIF1<0,准线为SKIPIF1<0,过焦点的直线分别交抛物线于SKIPIF1<0两点,分别过SKIPIF1<0作SKIPIF1<0的垂线,垂足为SKIPIF1<0.若SKIPIF1<0,且三角形SKIPIF1<0的面积为SKIPIF1<0,则SKIPIF1<0的值为A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<08.如图所示,已知抛物线SKIPIF1<0过点SKIPIF1<0,圆SKIPIF1<0.过圆心SKIPIF1<0的直线SKIPIF1<0与抛物线SKIPIF1<0和圆SKIPIF1<0分别交于SKIPIF1<0,则SKIPIF1<0的最小值为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<09.已知抛物线SKIPIF1<0,焦点为F,点M是抛物线C上的动点,过点F作直线SKIPIF1<0的垂线,垂足为P,则SKIPIF1<0的最小值为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.310.已知点SKIPIF1<0是抛物线SKIPIF1<0:SKIPIF1<0(SKIPIF1<0)上的动点,若SKIPIF1<0的最小值为1,则抛物线SKIPIF1<0的准线方程为(

)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<011.抛物线SKIPIF1<0的焦点为F,点SKIPIF1<0为该抛物线上的动点,点A是抛物线的准线与坐标轴的交点,则SKIPIF1<0的最大值是(

)A.2 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<012.已知抛物线SKIPIF1<0:SKIPIF1<0的焦点为SKIPIF1<0,点SKIPIF1<0,直线SKIPIF1<0与抛物线SKIPIF1<0交于点SKIPIF1<0(SKIPIF1<0在第一象限内),与其准线交于点SKIPIF1<0,若SKIPIF1<0,则点SKIPIF1<0到SKIPIF1<0轴距离为A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0二、多选题13.已知抛物线SKIPIF1<0的焦点为SKIPIF1<0,过焦点SKIPIF1<0的直线交抛物线于SKIPIF1<0两点,SKIPIF1<0为坐标原点,若SKIPIF1<0,则下列说法正确的是(

)A.SKIPIF1<0 B.直线SKIPIF1<0的斜率为SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<014.已知抛物线C:SKIPIF1<0与圆O:SKIPIF1<0交于A,B两点,且SKIPIF1<0,直线SKIPIF1<0过C的焦点F,且与C交于M,N两点,则下列说法中正确的是(

)A.若直线SKIPIF1<0的斜率为SKIPIF1<0,则SKIPIF1<0B.SKIPIF1<0的最小值为SKIPIF1<0C.若以MF为直径的圆与y轴的公共点为SKIPIF1<0,则点M的横坐标为SKIPIF1<0D.若点SKIPIF1<0,则SKIPIF1<0周长的最小值为SKIPIF1<015.如图所示,抛物线E:SKIPIF1<0的焦点为F,过点SKIPIF1<0的直线SKIPIF1<0,SKIPIF1<0与E分别相交于SKIPIF1<0,SKIPIF1<0和C,D两点,直线AD经过点F,当直线AB垂直于x轴时,SKIPIF1<0.下列结论正确的是(

)A.E的方程为SKIPIF1<0B.SKIPIF1<0C.若AD,BC的斜率分别为SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0D.若AD,BC的倾斜角分别为SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0的最大值为SKIPIF1<016.设O为坐标原点,F为抛物线C:SKIPIF1<0的焦点,过焦点F且倾斜角为SKIPIF1<0的直线SKIPIF1<0与抛物线C交于M,N两点(点M在第二象限),当SKIPIF1<0时,SKIPIF1<0,则下列说法正确的是(

)A.SKIPIF1<0B.△MON的面积的最小值为SKIPIF1<0C.存在直线SKIPIF1<0,使得SKIPIF1<0D.分别过点M,N且与抛物线相切的两条直线互相垂直17.已知抛物线SKIPIF1<0上三点SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,F为抛物线的焦点,则下列结论正确的是(

)A.抛物线的准线l的方程为SKIPIF1<0B.若F为SKIPIF

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