{#{QQABSQIAoggAABAAAAhCEwGKCAKQkBGACKoGhBAIsAAAyBNABAA=}#}{#{QQABSQIAoggAABAAAAhCEwGKCAKQkBGACKoGhBAIsAAAyBNABAA=}#}{#{QQABSQIAoggAABAAAAhCEwGKCAKQkBGACKoGhBAIsAAAyBNABAA=}#}{#{QQABSQIAoggAABAAAAhCEwGKCAKQkBGACKoGhBAIsAAAyBNABAA=}#}按秘密级事项管理丹东市2023~2024学年度上学期期末教学质量监测高二数学一、选择题1.C2.D3.B4.D5.A6.C7.B8.D二、选择题9.ABC10.BCD11.ACD12.ABD三、填空题13.7514.(6,-2)15.(0,3)16.2四、解答题17.解:(1)设所求圆C的方程为(xa)2y2r2(r0),依题意得(a1)242r2a1,作差得,所以圆C的标准方程为(x1)2y220.222(a3)2rr25…………………(5分)201(2)设过B且与圆C相切的直线的斜率为k,直线BC的斜率为k,因为13(1)21kk11,所以k2,则所求的切线方程为y22(x3),即y2x8.k1…………………(10分)18.解:9m0x2y2(1)因为方程1是椭圆,则满足m10,解得1m9,且m5,9mm19mm1所以m的取值范围为(1,5)(5,9).…………………(4分)x2y2(2)当m3时,椭圆方程为1,设l与C交于A(x,y),B(x,y),中点M(x,y)62112200高二数学第1页共6页{#{QQABSQIAoggAABAAAAhCEwGKCAKQkBGACKoGhBAIsAAAyBNABAA=}#}x2y211162所以有x1x22x0,y1y22y0,将A,B,代入椭圆中得,两式作差得x2y222162(y1y2)(y1y2)1y1y2y01y0,即,因为直线OM的斜率k1,(x1x2)(x1x2)3x1x2x03x0y1y211直线l的斜率k,所以kk1,直线OM的斜率与直线l的斜率乘积为定值.x1x233…………………(12分)19.解:(1)证明:因为平面PAC平面ABC,且平面PAC平面ABCAC,PO平面PAC,△PAC是等边三角形,O为AC的中点,所以POAC,所以PO平面ABC.…………………(4分)(2)因为ABBC,ABBC2,连接OB,所以OBAC,以O为坐标原点,OB的方向为x轴的正方向建立如图所示的空间直角坐标系O—xyz,由题11设得A(0,1,0),C(0,1,0),P(0,0,3),B(1,0,0),M(,,0),AP(0,1,3),22z13AM(,,0),PC(0,1,3)P22nAP0设平面APM的法向量为n(x,y,z),则,nAM0OACyy3z0M即13,可取n(33,3,1),Bxy022xnPC93设直线PC与平面PAM所成角为,sincosn,PC,所以sin,nPC3193所以直线PC与平面PAM所成角的正弦值为.31…………………(12分)20.解法一:(1)设点P(x,y),则A(4,y),OP(x,y),OA(4,y),由OAOP0,可得4xy20,即y24x,点P的轨迹方程E为y24x.…………………(4分)高二数学第2页共6页{#{QQABSQIAoggAABAAAAhCEwGKCAKQkBGACKoGhBAIsAAAyBNABAA=}#}y2y2y2y2(2)设M(1,y),N(2,y),由OMON,知12yy0,由yy0,可得4142441212.y1y216y2y212y2y2yy直线:144,即112,点代入可得MNx(yy1)x(yy1)(3,1)4y1y244.y1y24于是22.MN1m|y1y2|2[(y1y2)4y1y2]410…………………(12分)解法二:(1)同解法1.y2(2)可知MN不垂直于y轴,可设MN:xm(y1)3,x代入可得4y2mym30,因为m2m30,设M(x,y),N(x,y),则yy4m,4112212.y1y24(m3)y2y2由OMON,可得xxyy0,即12yy0,可知yy0,可得yy16,121244121212即4(m3)16,m1.于是22.MN1m|y1y2|2[(y1y2)4y1y2]410…………………(12分)21.解:(1)存在点Q,当A1Q2QN时,PQ//面A1CM.C1A1证明:取AB的中点D,连接CD,BD,DM,111NQDB1设A1NC1DQ,所以A1Q2QNP因为DM//CC1,且DMCC1,所以C1D//CM,又因为,且,BD//A1MC1DBDDCAMCMA1MM,所以平面C1DB//平面A1CM,BPQ平面C1DB,所以PQ//平面A1CM.…………………(6分)高二数学第3页共6页{#{QQABSQIAoggAABAAAAhCEwGKCAKQkBGACKoGhBAIsAAAyBNABAA=}#}(2)解法一:因为二面角A1CMB与二面角A1CMA互补,所以求二面角A1CMA的平面角,过A作AECM,垂足为E,连接A1E,根据三垂线定理A1ECM,所以A1EA是二面角A1CMA的平面角,因为BAC90,AC2,AM1,CM5,所以252430mAE,设AA1m,A1Mm,因为,所以m=2,即AA12.5564m25…………………(12分)z解法二:CA以为坐标原点,的方向为轴的正方向建立如图11AACxNQB1所示的空间直角坐标系A—xyz,设AA1a,由题设P得A1(0,0,a),C(2,0,0),B(0,2,0),M(0,1,0),CA1(2,0,a),CM(2,1,0),PC(0,1,3),设平面ACM的法向量1xCAMCAn0为,且11,Bn1(x,y,z)yCMn102xy0所以,可取n1(a,2a,2),平面CBM的一个法向量为n2(0,0,1),2xaz025a30所以cosn1,n2,则sinn1,n2,解得a2,故AA12.5a245a246…………………(12分)22.解法一:c5x2(1)依题意得c5,,所以a2,b1,所以C的方程为y21.a24…………………(4分)(2)设M(x1,y1),N(x2,y2),直线MA2:ym(x2),直线NA1:yn(x2).ym(x2)由,得2222.22(14m)x16mx16m40x4y40高二数学第4页共6页{#{QQABSQIAoggAABAAAAhCEwGKCAKQkBGACKoGhBAIsAAAyBNABAA=}#}16m248m224m由2x1,得x1,故y1.14m24m214m21yn(x2)由,得2222.22(14n)x16nx16n40x4y4016n248n224n由2x2,得x2,故y2.14n24n214n21yy由题设知12,故(4mn1)(3nm)0,由题意mn0,故m3n.x14x24点P(x,y),满足ym(x2)且yn(x2),所以x1,点P在定直线x1上.…………………(12分)解法二:(1)同解法1.x2(2)可知MN不垂直于y轴,可设MN:xmy4(m2),代入y21可得4222(m4)y8my120,因为16m1920,设M(x1,y1),N(x2,y2),则3myy(yy).12212y1y2由MA2:y(x2),NA1:y(x2),可得x12x223(yy)2yx2y(x2)myy2y122y3y121122221.x2y(x2)myy6y33y9y312121(yy)6y212121从而x1,故点P在定直线x1上.…………………(12分)解法三:(1)同解法1.x2(2)可知MN不垂直于y轴,可设MN:xmy4(m2),代入y21可得4222(m4)y8my120,因为16m1920,设M(x1,y1),N(x2,y2),则8m12yy,yy.12m2412m24y1y2由MA2:y(x2),NA1:y(x2),可得x12x222x242(x2)x2y(x2)y(x2)1(x2)(x2)2121412x2y1(x22)y1y2(x22)y1y2(x22)4y1y2高二数学第5页共6页{#{QQABSQIAoggAABAAAAhCEwGKCAKQkBGACKoGhBAIsAAAyBNABAA=}#}(my2)(my2)124y1y2m2m(yy)11242y1y2y1y2m2m2m2443121.3从而x1,故点P在定直线x1上.…………………(12分)解法四:1设M(x,y),N(x,y),当直线MN的斜率存在时,设MN:ym(x4)(m),11222ym(x4)由,得2222,22(14m)x32mx64m40x4y432m264m24所以x1x2,x1x2,14m214m2y1y2因为MA2:y(x2),NA1:y(x2),联立方程解得x12x222(yxyx)4(yy)x122112y1x2y2x12y12y2因为2(y1x2y2x1)4(y1y2)(y1x2y2x12y12y2)y1x23y2x12y16y24mx1x210m(x1x2)16m64m2432m2m(41016)04m214m21所以x1,当直线MN的斜率不存在时,MN:x4,所以M(4,3),N(4,3)33MA:y(x2),NA:y(x2)22163联立方程解得P(1,),故点P在定直线x1上.2…………………(12分)高二数学第6页共6页{#{QQABSQIAoggAABAAAAhCEwGKCAKQkBGACKoGhBAIsAAAyBNABAA=}#}
数学-辽宁省丹东市2023-2024学年高二上学期期末质量检测
2024-01-25
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