新高考数学一轮复习百题刷过关专题12 平面向量综合必刷100题(原卷版)_第1页
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专题12平面向量综合必刷100题任务一:善良模式(基础)1-30题一、单选题1.已知SKIPIF1<0,向量SKIPIF1<0,若SKIPIF1<0,则实数SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0 C.-2 D.22.设SKIPIF1<0中SKIPIF1<0边上的中线为SKIPIF1<0,点SKIPIF1<0满足SKIPIF1<0,则SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<03.若平面向量SKIPIF1<0两两的夹角相等,且SKIPIF1<0,则SKIPIF1<0()A.2 B.5 C.2或5 D.SKIPIF1<0或SKIPIF1<04.在菱形SKIPIF1<0中,SKIPIF1<0、SKIPIF1<0分别是SKIPIF1<0、SKIPIF1<0的中点,若SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0()A.0 B.SKIPIF1<0 C.4 D.SKIPIF1<05.如图,点SKIPIF1<0在半径为SKIPIF1<0的SKIPIF1<0上运动,SKIPIF1<0若SKIPIF1<0,则SKIPIF1<0的最大值为()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<06.已知向量SKIPIF1<0满足SKIPIF1<0,则SKIPIF1<0与SKIPIF1<0夹角为()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<07.已知SKIPIF1<0,SKIPIF1<0,,则SKIPIF1<0在SKIPIF1<0方向上的投影为()A.1 B.5 C.SKIPIF1<0 D.SKIPIF1<08.在SKIPIF1<0中,SKIPIF1<0,且SKIPIF1<0,则SKIPIF1<0取最小值时SKIPIF1<0的值为()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<09.在SKIPIF1<0中,点SKIPIF1<0是线段SKIPIF1<0上靠近点SKIPIF1<0的三等分点,点SKIPIF1<0在线段SKIPIF1<0上,SKIPIF1<0,则SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<010.已知点SKIPIF1<0,若过点SKIPIF1<0的直线l交圆于C:SKIPIF1<0于A,B两点,则SKIPIF1<0的最大值为()A.12 B.SKIPIF1<0 C.10 D.SKIPIF1<011.以下四个命题中正确的是()A.若SKIPIF1<0,则SKIPIF1<0三点共线B.若SKIPIF1<0为空间的一个基底,则SKIPIF1<0构成空间的另一个基底C.SKIPIF1<0D.SKIPIF1<0为直角三角形的充要条件是SKIPIF1<012.已知向量SKIPIF1<0、SKIPIF1<0满足SKIPIF1<0,且SKIPIF1<0,则SKIPIF1<0在SKIPIF1<0方向上的投影是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<013.在△ABC中,已知AB=3,AC=5,△ABC的外接圆圆心为O,则SKIPIF1<0A.4 B.8 C.10 D.1614.已知向量SKIPIF1<0与向量SKIPIF1<0不共线,SKIPIF1<0,对任意SKIPIF1<0,恒有SKIPIF1<0,则()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<015.如图所示,矩形SKIPIF1<0的对角线相交于点SKIPIF1<0,点SKIPIF1<0在线段SKIPIF1<0上且SKIPIF1<0,若SKIPIF1<0(SKIPIF1<0,SKIPIF1<0),则SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0二、多选题16.已知平面向量SKIPIF1<0、SKIPIF1<0、SKIPIF1<0为三个单位向量,且SKIPIF1<0,若SKIPIF1<0(SKIPIF1<0),则SKIPIF1<0的取值可能为()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<017.下列说法中错误的是()A.已知SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0与SKIPIF1<0可以作为平面内所有向量的一组基底B.若SKIPIF1<0与SKIPIF1<0共线,则SKIPIF1<0在SKIPIF1<0方向上的投影为SKIPIF1<0C.若两非零向量SKIPIF1<0,SKIPIF1<0满足SKIPIF1<0,则SKIPIF1<0D.平面直角坐标系中,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0为锐角三角形18.设SKIPIF1<0,SKIPIF1<0是两个非零向量,下列四个命题为真命题的是()A.若SKIPIF1<0,则SKIPIF1<0和SKIPIF1<0的夹角为SKIPIF1<0B.若SKIPIF1<0,则SKIPIF1<0和SKIPIF1<0的夹角为SKIPIF1<0C.若SKIPIF1<0,则SKIPIF1<0和SKIPIF1<0方向相同D.若SKIPIF1<0,则SKIPIF1<0和b的夹角为钝角19.在SKIPIF1<0中,有如下四个命题正确的有()A.若SKIPIF1<0,则SKIPIF1<0为锐角三角形B.若SKIPIF1<0,则SKIPIF1<0的形状为直角三角形C.SKIPIF1<0内一点G满足SKIPIF1<0,则G是SKIPIF1<0的重心D.若SKIPIF1<0,则点P必为SKIPIF1<0的外心20.已知向量SKIPIF1<0是两个非零向量,在下列条件中,一定能使SKIPIF1<0共线的是()A.SKIPIF1<0且SKIPIF1<0B.存在相异实数SKIPIF1<0,使SKIPIF1<0C.SKIPIF1<0(其中实数x,y满足SKIPIF1<0)D.已知梯形ABCD,其中SKIPIF1<0第II卷(非选择题)三、填空题21.已知在SKIPIF1<0中,SKIPIF1<0,则SKIPIF1<0___________.22.在SKIPIF1<0中,点SKIPIF1<0满足SKIPIF1<0,当SKIPIF1<0点在线段SKIPIF1<0上移动时,若SKIPIF1<0,则SKIPIF1<0的最小值是________.23.在SKIPIF1<0中,点D是边SKIPIF1<0的中点,点G在SKIPIF1<0上,且是SKIPIF1<0的重心,则用向量SKIPIF1<0、SKIPIF1<0表示SKIPIF1<0为___________.24.已知点G为△ABC的重心,过G作直线与AB、AC两边分别交于M、N两点,且SKIPIF1<0=xSKIPIF1<0,SKIPIF1<0=ySKIPIF1<0,求SKIPIF1<0的值为________.25.如图,在菱形SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0.已知SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0______.四、解答题26.已知SKIPIF1<0,SKIPIF1<0,SKIPIF1<0.(1)求SKIPIF1<0与SKIPIF1<0的夹角θ;(2)求SKIPIF1<0;(3)若SKIPIF1<0,求实数λ的值.27.已知O,A,B是不共线的三点,且SKIPIF1<0(1)若m+n=1,求证:A,P,B三点共线;(2)若A,P,B三点共线,求证:m+n=1.28.如图,已知D,E,F分别为SKIPIF1<0的三边SKIPIF1<0,SKIPIF1<0,SKIPIF1<0的中点,求证:SKIPIF1<0.29.已知向量SKIPIF1<0,SKIPIF1<0,SKIPIF1<0.(1)若点SKIPIF1<0,SKIPIF1<0,SKIPIF1<0能够成三角形,求实数SKIPIF1<0应满足的条件;(2)若SKIPIF1<0为直角三角形,且SKIPIF1<0为直角,求实数SKIPIF1<0的值.30.设SKIPIF1<0的内角A,B,C的对边长a,b,c成等比数列,SKIPIF1<0,延长SKIPIF1<0至D使SKIPIF1<0.(1)求SKIPIF1<0的大小;(2)求SKIPIF1<0的取值范围.任务二:中立模式(中档)1-40题一、单选题1.设SKIPIF1<0、SKIPIF1<0、SKIPIF1<0为非零不共线向量,若SKIPIF1<0,则()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<02.在平面直角坐标系SKIPIF1<0中,已知点SKIPIF1<0.若动点M满足SKIPIF1<0,则SKIPIF1<0的取值范围是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<03.已知SKIPIF1<0是边长为2的正方形,SKIPIF1<0为平面SKIPIF1<0内一点,则SKIPIF1<0的最小值是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<04.已知点SKIPIF1<0为正SKIPIF1<0所在平面上一点,且满足SKIPIF1<0,若SKIPIF1<0的面积与SKIPIF1<0的面积比值为SKIPIF1<0,则SKIPIF1<0的值为()A.SKIPIF1<0 B.SKIPIF1<0C.2 D.35.已知直线SKIPIF1<0:SKIPIF1<0与圆SKIPIF1<0:SKIPIF1<0的交点为SKIPIF1<0,SKIPIF1<0,点SKIPIF1<0是圆SKIPIF1<0上一动点,设点SKIPIF1<0,则SKIPIF1<0的最大值为()A.9 B.10 C.11 D.126.已知平面向量SKIPIF1<0满足SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0的最小值为()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<07.已知向量SKIPIF1<0,SKIPIF1<0,SKIPIF1<0为平面向量,SKIPIF1<0,且SKIPIF1<0使得SKIPIF1<0与SKIPIF1<0所成夹角为SKIPIF1<0,则SKIPIF1<0的最大值为()A.SKIPIF1<0 B.SKIPIF1<0 C.1 D.SKIPIF1<08.非零向量SKIPIF1<0,SKIPIF1<0满足SKIPIF1<0,且SKIPIF1<0,则SKIPIF1<0为()A.三边均不相等的三角形 B.直角三角形 C.等腰非等边三角形 D.等边三角形9.在SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0,则SKIPIF1<0的取值范围是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<010.已知SKIPIF1<0的三个内角分别为SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,动点SKIPIF1<0满足SKIPIF1<0,SKIPIF1<0,则动点SKIPIF1<0的轨迹一定经过SKIPIF1<0的()A.重心 B.垂心 C.内心 D.外心11.已知平面向量SKIPIF1<0满足SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,若对于任意实数SKIPIF1<0,不等式SKIPIF1<0恒成立,则实数SKIPIF1<0的取值范围是SKIPIF1<0SKIPIF1<0A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<012.已知A、B、C是平面上不共线的三点,O为△ABC的外心,动点P满足SKIPIF1<0,则点P的轨迹一定过△ABC的()A.内心 B.垂心 C.重心 D.AC边的中点13.平面内SKIPIF1<0及一点SKIPIF1<0满足SKIPIF1<0,则点SKIPIF1<0是SKIPIF1<0的()A.重心 B.内心 C.外心 D.垂心14.设点SKIPIF1<0是SKIPIF1<0的重心,且满足SKIPIF1<0,则SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<015.若直线SKIPIF1<0过△SKIPIF1<0的重心SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0,其中SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0的最小值是().A.SKIPIF1<0 B.SKIPIF1<0 C.2 D.SKIPIF1<016.在SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0,则点SKIPIF1<0的轨迹一定通过SKIPIF1<0的()A.重心 B.内心C.外心 D.垂心17.在SKIPIF1<0中,角SKIPIF1<0、SKIPIF1<0、SKIPIF1<0的对边分别为SKIPIF1<0、SKIPIF1<0、SKIPIF1<0,若SKIPIF1<0,SKIPIF1<0,点SKIPIF1<0是SKIPIF1<0的重心,且SKIPIF1<0,则SKIPIF1<0()A.SKIPIF1<0或SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0或SKIPIF1<0 D.SKIPIF1<018.在SKIPIF1<0中,SKIPIF1<0是SKIPIF1<0的中点,SKIPIF1<0是SKIPIF1<0的中点,过点SKIPIF1<0作一直线SKIPIF1<0分别与边SKIPIF1<0,SKIPIF1<0交于SKIPIF1<0,SKIPIF1<0,若SKIPIF1<0,则SKIPIF1<0的最小值是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<019.已知圆SKIPIF1<0的半径为2,A为圆内一点,SKIPIF1<0,B,C为圆SKIPIF1<0上任意两点,则SKIPIF1<0的取值范围是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<020.已知SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,若对任意实数SKIPIF1<0,SKIPIF1<0(SKIPIF1<0)恒成立,则SKIPIF1<0的取值范围是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0二、多选题21.数学家欧拉于1765年在其著作《三角形中的几何学》首次指出:SKIPIF1<0的外心SKIPIF1<0,重心SKIPIF1<0,垂心SKIPIF1<0,依次位于同一条直线上,且重心到外心的距离是重心到垂心距离的一半,该直线被称为欧拉线.若SKIPIF1<0,SKIPIF1<0,则下列各式正确的是()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<022.著名数学家欧拉提出了如下定理:三角形的外心、重心、垂心依次位于同一直线上,且重心到外心的距离是重心到垂心距离的一半.此直线被称为三角形的欧拉线,该定理被称为欧拉线定理.已知△ABC的外心为O,重心为G,垂心为H,M为BC中点,且AB=4,AC=2,则下列各式正确的有()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<023.在SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,下述四个结论中正确的是()A.若SKIPIF1<0为SKIPIF1<0的重心,则SKIPIF1<0B.若SKIPIF1<0为SKIPIF1<0边上的一个动点,则SKIPIF1<0为定值2C.若SKIPIF1<0,SKIPIF1<0为SKIPIF1<0边上的两个动点,且SKIPIF1<0,则SKIPIF1<0的最小值为SKIPIF1<0D.已知SKIPIF1<0为SKIPIF1<0内一点,若SKIPIF1<0,且SKIPIF1<0,则SKIPIF1<0的最大值为224.已知SKIPIF1<0为SKIPIF1<0所在平面内一点,且SKIPIF1<0,SKIPIF1<0,SKIPIF1<0是边SKIPIF1<0的三等分点靠近点SKIPIF1<0,SKIPIF1<0,SKIPIF1<0与SKIPIF1<0交于点SKIPIF1<0,则()A.SKIPIF1<0B.SKIPIF1<0C.SKIPIF1<0D.SKIPIF1<0的最小值为-625.在SKIPIF1<0中,角SKIPIF1<0、SKIPIF1<0、SKIPIF1<0所对的边分别是SKIPIF1<0、SKIPIF1<0、SKIPIF1<0,点SKIPIF1<0是其所在平面内一点,()A.若SKIPIF1<0,则点SKIPIF1<0在SKIPIF1<0的中位线上B.若SKIPIF1<0,则SKIPIF1<0为SKIPIF1<0的重心C.若SKIPIF1<0,则SKIPIF1<0为锐角三角形D.若SKIPIF1<0,则SKIPIF1<0是等腰三角形26.下列说法中错误的为()A.已知SKIPIF1<0,SKIPIF1<0且SKIPIF1<0与SKIPIF1<0夹角为锐角,则SKIPIF1<0B.点SKIPIF1<0为SKIPIF1<0的内心,且SKIPIF1<0,则SKIPIF1<0为等腰三角形;C.若SKIPIF1<0与SKIPIF1<0平行,SKIPIF1<0在SKIPIF1<0方向上的投影为SKIPIF1<0D.若非零SKIPIF1<0,SKIPIF1<0满足SKIPIF1<0则SKIPIF1<0与SKIPIF1<0的夹角是SKIPIF1<027.如图,ABCD中,AB=1,AD=2,∠BAD=SKIPIF1<0,E为CD的中点,AE与DB交于F,则下列叙述中,一定正确的是()A.SKIPIF1<0在SKIPIF1<0上的投影向量为(0,0) B.SKIPIF1<0C.SKIPIF1<0 D.若SKIPIF1<0,则SKIPIF1<028.已知SKIPIF1<0是△SKIPIF1<0所在平面内一点,则下列说法正确的是()A.若SKIPIF1<0,则SKIPIF1<0是△SKIPIF1<0的重心B.若向量SKIPIF1<0,且SKIPIF1<0,则△SKIPIF1<0是正三角形C.若SKIPIF1<0是△SKIPIF1<0的外心,SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0的值为-8D.若SKIPIF1<0,则SKIPIF1<0第II卷(非选择题)三、填空题29.如图,△ABC中,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0为△ABC重心,P为线段BG上一点,则SKIPIF1<0的最大值为___________.30.在SKIPIF1<0中,下列命题中正确的有:___________①SKIPIF1<0;②若SKIPIF1<0,则SKIPIF1<0为锐角三角形;③SKIPIF1<0是SKIPIF1<0所在平面内一定点,动点SKIPIF1<0满足SKIPIF1<0,SKIPIF1<0,则动点SKIPIF1<0一定过SKIPIF1<0的重心;④SKIPIF1<0是SKIPIF1<0内一定点,且SKIPIF1<0,则SKIPIF1<0;⑤若SKIPIF1<0,且SKIPIF1<0,则SKIPIF1<0为等边三角形.31.已知向量SKIPIF1<0,SKIPIF1<0是平面内的两个非零向量,则当SKIPIF1<0取最大值时,SKIPIF1<0与SKIPIF1<0夹角为________.32.点SKIPIF1<0为SKIPIF1<0所在平面内一点,SKIPIF1<0,SKIPIF1<0,若SKIPIF1<0的面积为SKIPIF1<0,则SKIPIF1<0的最小值是________.33.①若SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0为锐角,则实数SKIPIF1<0的取值范围是SKIPIF1<0②点SKIPIF1<0在SKIPIF1<0所在的平面内,若SKIPIF1<0,则点SKIPIF1<0为SKIPIF1<0的垂心③点SKIPIF1<0在SKIPIF1<0所在的平面内,若SKIPIF1<0,SKIPIF1<0,SKIPIF1<0分别表示SKIPIF1<0,SKIPIF1<0的面积,则SKIPIF1<0④点SKIPIF1<0在SKIPIF1<0所在的平面内,满足SKIPIF1<0且SKIPIF1<0,则点SKIPIF1<0是SKIPIF1<0的外心.以上命题为假命题的序号是___________.34.如图,两块斜边长相等的直角三角板拼在一起,若SKIPIF1<0,则SKIPIF1<0________.35.已知向量SKIPIF1<0,SKIPIF1<0满足SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0的最大值是________.36.已知平面向量SKIPIF1<0,SKIPIF1<0的夹角为45°,SKIPIF1<0且SKIPIF1<0,则SKIPIF1<0的最小值是___________.四、解答题37.平面直角坐标系xOy中,已知向量SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0.(1)若已知M(1,1),N(y+1,2),y∈[0,2],则求出SKIPIF1<0的范围;(2)若SKIPIF1<0,求四边形ABCD的面积.38.在SKIPIF1<0中,角SKIPIF1<0所对边分别为SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0为SKIPIF1<0边上的中线,SKIPIF1<0点在SKIPIF1<0上,满足SKIPIF1<0.(1)求SKIPIF1<0及线段SKIPIF1<0的长;(2)求SKIPIF1<0的面积.39.已知向量SKIPIF1<0与SKIPIF1<0的夹角为SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0.(1)若向量SKIPIF1<0与SKIPIF1<0共线,求实数SKIPIF1<0的值;(2)若向量SKIPIF1<0与SKIPIF1<0的夹角为锐角,求实数SKIPIF1<0的取值范围.40.在等边SKIPIF1<0中,SKIPIF1<0,点SKIPIF1<0为SKIPIF1<0的中点,SKIPIF1<0交SKIPIF1<0于点SKIPIF1<0.(1)证明:点SKIPIF1<0为SKIPIF1<0的中点;(2)若SKIPIF1<0,求SKIPIF1<0的面积.任务三:邪恶模式(困难)1-30题一、单选题1.如图,在等腰△SKIPIF1<0中,已知SKIPIF1<0分别是边SKIPIF1<0的点,且SKIPIF1<0,其中SKIPIF1<0且SKIPIF1<0,若线段SKIPIF1<0的中点分别为SKIPIF1<0,则SKIPIF1<0的最小值是()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<02.在SKIPIF1<0中,SKIPIF1<0,点SKIPIF1<0在边SKIPIF1<0上,且SKIPIF1<0,设SKIPIF1<0,则当SKIPIF1<0取最大值时,SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<03.已知SKIPIF1<0为单位向量,且SKIPIF1<0,若非零向量SKIPIF1<0满足SKIPIF1<0,则SKIPIF1<0的最大值是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<04.如图,在平面四边形SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,若点F为边SKIPIF1<0上的动点,则SKIPIF1<0的最小值为()A.1 B.SKIPIF1<0 C.SKIPIF1<0 D.25.在SKIPIF1<0中,已知SKIPIF1<0,SKIPIF1<0,SKIPIF1<0的面积为6,若SKIPIF1<0为线段SKIPIF1<0上的点(点SKIPIF1<0不与点SKIPIF1<0,点SKIPIF1<0重合),且SKIPIF1<0,则SKIPIF1<0的最小值为().A.9 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<06.在SKIPIF1<0中,已知SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0为线段SKIPIF1<0上的一点,且SKIPIF1<0,则SKIPIF1<0的最小值为()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<07.已知O是SKIPIF1<0所在平面上的一点,若SKIPIF1<0(其中P是SKIPIF1<0所在平面内任意一点),则O点是SKIPIF1<0的()A.外心 B.内心 C.重心 D.垂心8.已知向量SKIPIF1<0,SKIPIF1<0,SKIPIF1<0满足SKIPIF1<0,SKIPIF1<0在SKIPIF1<0方向上的投影为2,SKIPIF1<0,则SKIPIF1<0的最小值为()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<09.已知SKIPIF1<0的内角分别为SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0的内切圆面积为SKIPIF1<0,则SKIPIF1<0的最小值为()A.SKIPIF1<0 B.8 C.SKIPIF1<0 D.SKIPIF1<010.如图,在等腰梯形SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,点SKIPIF1<0,SKIPIF1<0分别为SKIPIF1<0,SKIPIF1<0的中点.如果对于常数SKIPIF1<0,在等腰梯形SKIPIF1<0的四条边上,有且只有8个不同的点SKIPIF1<0使得SKIPIF1<0成立,那么SKIPIF1<0的取值范围是()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<011.已知平面向量SKIPIF1<0,SKIPIF1<0,SKIPIF1<0(SKIPIF1<0与SKIPIF1<0不共线),满足SKIPIF1<0,SKIPIF1<0,设SKIPIF1<0,则SKIPIF1<0的取值范围为()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<012.已知双曲线SKIPIF1<0:SKIPIF1<0的左、右焦点分别为SKIPIF1<0,SKIPIF1<0,过点SKIPIF1<0且斜率为SKIPIF1<0的直线与双曲线在第二象限的交点为SKIPIF1<0,若SKIPIF1<0,则双曲线SKIPIF1<0的渐近线方程是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<013.半径为SKIPIF1<0的圆SKIPIF1<0上有三点SKIPIF1<0、SKIPIF1<0、SKIPIF1<0满足SKIPIF1<0,点SKIPIF1<0是圆内一点,则SKIPIF1<0的取值范围为()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<014.已如平面向量SKIPIF1<0、SKIPIF1<0、SKIPIF1<0,满足SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0的最大值为()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<015.平面上的两个向量SKIPIF1<0和SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0若向量SKIPIF1<0SKIPIF1<0,且SKIPIF1<0,则SKIPIF1<0的最大值为()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0二、多选题16.对于给定的SKIPIF1<0,其外心为SKIPIF1<0,重心为SKIPIF1<0,垂心为SKIPIF1<0,则下列结论正确的是()A.SKIPIF1<0B.SKIPIF1<0C.过点SKIPIF1<0的直线SKIPIF1<0交SKIPIF1<0于SKIPIF1<0,若SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0D.SKIPIF1<0与SKIPIF1<0共线17.如图,直角SKIPIF1<0的斜边BC长为2,SKIPIF1<0,且点B,C分别在x轴正半轴和y轴正半轴上滑动,点A在线段BC的右上方则()A.SKIPIF1<0有最大值也有最小值 B.SKIPIF1<0有最大值无最小值C.SKIPIF1<0有最小值无最大值 D.SKIPIF1<0无最大值也无最小值18.在SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0、SKIPIF1<0的交点为SKIPIF1<0,过SKIPIF1<0作动直线SKIPIF1<0分别交线段SKIPIF1<0、SKIPIF1<0于SKIPIF1<0、SKIPIF1<0两点,若SKIPIF1<0,SKIPIF1<0,则SKIPIF1<0的不可能取到的值为()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<019.“奔驰定理”是平面向量中一个非常优美的结论,因为这个定理对应的图形与“奔驰”轿车(Mercedesbenz)的logo很相似,故形象地称其为“奔驰定理”.奔驰定理:已知SKIPIF1<0是SKIPIF1<0内的一点,SKIPIF1<0、SKIPIF1<0、SKIPIF1<0的面积分别为SKIPIF1<0、SKIPIF1<0、SKIPIF1<0,则SKIPIF1<0.若SKIPIF1<0是锐角SKIPIF1<0内的一点,SKIPIF1<0、SKIPIF1<0、SKIPIF1<0是SKIPIF1<0的三个内角,且点SKIPIF1<0满足SKIPIF1<0,则()A.SKIPIF1<0为SKIPIF1<0的垂心B.SKIPIF1<0C.SKIPIF1<0

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