云南省昆明一中高三上学期二轮复习12月考( 五) (1).zip
#QQABAYYAoggAQgBAARgCQQHaCgGQkAEAAIoGABAAoAABwBNABAA=#SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!#QQABAYYAoggAQgBAARgCQQHaCgGQkAEAAIoGABAAoAABwBNABAA=#SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!#QQABAYYAoggAQgBAARgCQQHaCgGQkAEAAIoGABAAoAABwBNABAA=#SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!#QQABAYYAoggAQgBAARgCQQHaCgGQkAEAAIoGABAAoAABwBNABAA=#SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!第 1 页(共 8 页)学科网(北京)股份有限公司昆明一中 2024 届高三第 5 次联考 数学参考答案 命题、审题组教师命题、审题组教师 杨昆华杨昆华 彭力彭力 李文清李文清 李春宣李春宣 丁茵丁茵 王在方王在方 张远雄张远雄 李露李露 陈泳序陈泳序 杨耕耘杨耕耘 一、选择题一、选择题 题号 1 2 3 4 5 6 7 8 答案 D A B D C B C C 1解析:因为,所以,选 D 12iz 5z 2解析:因为,选 A 1,4A 1,2B 3解析:设直角圆锥底面半径,直角圆锥母线,直角圆锥的侧面展OCrACl开图的圆心角大小为,由直角圆锥的定义可得,则AOOCr2lACr,由可得,选 B 2lr2222rrlr4解析:在上单调递增,在tan()3yx5,66kk(Z)ksin(2)3yx5,1212kk上单调递增,在上单调递增,在(Z)kcos(2)6yx5,1212kk(Z)ksinyx,2kk上单调递增,则 A,B,C 错,选 D(Z)k5解析:因为直线分别与轴,轴交于,两点,所以,又因为点在圆+40 x yxyAB4 2AB P上,所以圆心为,则圆心到直线距离,故点到直线22(2)2xy0 2,10243 22dP+40 x y的距离的范围为,则,选 C 2d2 2 4 2,212ABPSAB dA8 16,6解析:由题意得,将代入,得2sincos3cos32sin22sincos1,则,选 B 23sin206sin3tan27解析:由题意,在有解,则有解,因为1()401fxaxx1,21114(1)4()12ax xx 在上单调增,得,则,选 C 21()4()12u xx1,()0u x 0a 8解析:因为每个人中奖的概率都为,与抽取的顺序无关,所以 A 错误;令“丁未中奖”为事件 A,14“甲或乙中奖”为事件 B,则,所以 B 错误;因为事3()4P A 111()442P AB()2(|)()3P ABP B AP A件“甲或乙中奖”与事件“丙或丁中奖”不可能同时发生且至少有一个发生,所以它们为对立事件,CSG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!第 2 页(共 8 页)学科网(北京)股份有限公司正确;设“丙中奖”为事件,“丁中奖”为事件,则,因为只有一张奖券可以中奖,所MN1()()4P MP N以事件,不可能同时发生,所以,所以,所以事件,不相互独MN()0P MN()()()P MNP M P NMN立,所以 D 不正确,选 C 二、多选题二、多选题 题号 9 10 11 12 答案 AC ACD ABD CD 9解析:因为回归方程的斜率为正,所以相关变量,具有正相关关系,所以 A 正确;由代入xy2x 得,去 除 两 个 异 常 数 据,和,后,得 到 新 的,1.50.6yx2.4y(27)(27)2 8863x,所 以 B 错 误;又 因 为 得 到 的 新 的 经 验 回 归 直 线 的 斜 率 为 3,所 以 由2.4 83.26y,所以去除异常数据后的经验回归方程为,故 C 正确;因为经验回833.234.83yx 34.8yx归直线的斜率为正数,所以变量,具有正相关关系,去除异常数据后,斜率增大,值增加的速度变xy y大,D 错误,选 AC 10解析:对于 A:由题意可得或,故 A 错误;/ll对于 B:由图象可得,则;所以,根据线面角的定义可得:与所成23CAD3DAB6ADBl角为,故 B 正确;6对于 C:若点恰好在交线上,则不一定垂直于另一个平面,当且仅当点不在交线上时,根据面面垂直的性质定理,才可得到垂线垂直于另一个平面,故 C 错误;对于 D:当平面内存在不共线的三点在平面的同侧且平面的距离相等,可得平面平面;当/平面内存在不共线的三点在平面的两侧时,若到平面的距离相等,则平面与平面相交,所以D 错误;选 ACD 11解析:由题,有 2,2C对于,因为,正确 222 24 2OOOBCA 对于,因为,所以,2PAPBPC PAPBBA 22224PAPBPA PBPC ,两 式 相 加 得,所 以2222PAPBPA PBBA 2222222444PAPBPCBAPCAC ,正确 22222PAPBPCAC 对于,当点与点重合时,与的夹角为,错误 AEOCCA 34SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!第 3 页(共 8 页)学科网(北京)股份有限公司对于,的面积为,正确 CDE2选 ABD 12解析:因为当时,的面积为,所以 A 错误;因为当时,0t 1AFB20t 12tan23AF F,当时,根据对称性,存在 使为直角三角123AF F1t 122 5tan15AF F124AF Ft1AFB形,所以 B 错误;根据椭圆对称性可知,当时,四边形面积最大,0t 12AF BF所以 C 正确;由椭圆的定义得:的 周 长,因 为1AFB112222(2)(2)4ABAFBFABaAFaBFaABAFBF,所以,当过点时取等号,22AFBFAB220ABAFBFAB2F所以,所以直线过椭圆的右焦点1122444 5ABAFBFaABAFBFa(11)xtt 2F时,的周长最大,所以 D 正确,选 CD 1AFB 三、填空题三、填空题 13解析:当时,得 0 x 0 x()21()xfxf x ()21xf x 14解析:当时,恒成立;当时,的解集为;综上,的解集0 x e0 x0 x 20 xx1,0()0f x 为)1,15 解 析:因 为,所 以;又 因 为,所 以,所 以532ppAF 6p 51cospAF1cos5 151cos2pBF16解析:由题知,为奇数,所以:,110()Bf B11B313266,为偶数,所以:,221()BfB22B1316410因为,为偶数,为奇数,222122122()()nnnnnnBfBffB2n21n 所以对于偶数项,得,21221nnBB 2214nnBBn22241nnBBn则为等差数列,得数列中:222nnBB2nB第项为:,23(41)0(374341)(21)2nnnnnn第项为:,43(374341)(21)3nnnn第项为:;67(374341)(21)7nnnn对于奇数项,得,212221nnBBn2212nnBB 22223nnBBnSG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!第 4 页(共 8 页)学科网(北京)股份有限公司则为等差数列,得数列中:222nnBB2nB第 项为:,1 1(23)2(12523)2(2)22nnnnnn 第 项为:,3 1(23)2(12523)2(2)22nnnnnn 第项为:,55(12523)(2)5nnnn 所以所有的项的和为 2nB 2(21)(21)3(21)7(2)2(2)2(2)59319nnnnnnn nn nn nnn所以为:,;的所有项的和 2B13164102nB29319nn 四、解答题四、解答题 17解:(1)证明:因为四边形为平行四边形,所以,ABCDABCD因为平面,且平面,所以平面,AB PCDCD PCDABPCD因为平面平面且平面,所以,ABEF PCDEFAB ABEFABEF所以 5 分 CDEF(2)建立如图所示的空间直角坐标系 Axyz由(1)知且,则,CDEF23EFCD2PEEC 则,0,0,0A3,0,0B0,0,3P0,6,0C0,4,1E,所以,3,6,0D 0,4,1AE 3,0,0AB 0,2,1EC ,设平面的一个法向量为,3,0,0DC ABEF1111,nx y z 则,得,1100nAEnAB 10,1,4n 设平面的一个法向量为,则,得,DCEF2222,nxyz 2200nECnDC 20,1,2n 则,121212187 85cos,85175nnn nnn 所以平面与平面夹角的余弦值为 10 分 BEFDFE7 8585 18解:(1)由题意得,所以左焦点为,右焦点为 134222bac)0,1(1F)0,1(2FFDACBzxyPESG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!第 5 页(共 8 页)学科网(北京)股份有限公司设点的坐标为,则,化简得,M),(yx22)1()1(|222221yxyxMFMF8)3(22yx所以点的轨迹方程为 6 分 M8)3(22yx(2)由(1)得,点的轨迹方程为,所以圆心到直线距离为,M8)3(22yx1 xy2所以直线与相交的线段,1 xyM62282|AB联立直线与的轨迹方程,1 xyE,得,134122yxxy08872 xx由根与系数的关系得.78,782121xxxx直线曲线相交的线段 1 xyC.724|1|212xxkCD所以 12 分.126772462|CDAB 19解:(1)因为,1 tantantantan()2 coscosBCBCCB所以,sin cossincos1sinsin()cos cos2 cos coscos cosBCCBBCBCCBCB所以,sin1sinsin()cos cos2 cos coscos cosABCBCCBCB所以,由正弦定理得:,2sinsinsinABC2bca因为,所以,的周长等于 6 分 3a 6bcABC9(2)由余弦定理得:,又由(1)得:,222+ccos2baAbc2bca2bca所以,2222222231+c()(+c)+c242cos222bcbbbcbaAbcbcbc而(当且仅当时取“”),222bcbcbc所以,223131(+c)214242cos222bbcbcbcAbcbc(当且仅当,即为正三角形时,取“”),abcABC又因为,余弦函数在上单调递减,0Acosyx0,SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!第 6 页(共 8 页)学科网(北京)股份有限公司所以,12 分 03A3 30tansin2AA 20解:(1)依题意:每 5 人一组需要验血次数的所有可能取值为,X16所以:,510.95P X 5610.95P X 所以的分布列为:X X 1 6 P 50.95 510.95所以 5551 0.95610.95650.952.131E X 所以共需要化验次数大约为:(次)100002.13142625故大约减少(次)6 分 1000042625738(2)假设个人一组,设每个人需要化验的次数为,kY若混合血样呈阴性,则,若混合血样呈阳性,则 1Yk11Yk 所以的分布列为:Y Y 1k 11k P 0.98k 10.98k所以 *110.981 10.9810.98kkkE Ykkkk N因为先减后增,10.98kkak,78781110.980.980.017307856aa78aa,981110.85080.83370.017109872aa 98aa所以当时,最小,最小值为:,8k=E Y 0.2742E Y 此时大约需要化验:次 12 分 100000.27422742 21解:(1)由已知得:,2321223baaa 354321222245baaaaaSG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!第 7 页(共 8 页)学科网(北京)股份有限公司因为,所以,2122nnaa221nnaa12(1)12121212nnnnnnbbaaaa而,所以是以 为首项,为公差的等差数列,111ba nb12所以数列的通项公式为 4 分 nb21nbn(2)不等式化为:,121111+)(1+)(1+)21npnbbb(12111(1+)(1+)(1+)21nbbbpn设,12111(1+)(1+)(1+)()21nbbbf nn则,2121(1+)21(1)224841()4832(1)1(21)(23)nnbf nnnnf nnnnnn所以在上单调递增,所以,因为在上恒成立,所以()f nnNmin2 3()(1)3f nf()f npnN,所以的取值范围为 8 分 min()f npp2 3(03,(3)若,(,)构成等比数列,则,2bmbkbmkN5mk22mkbbb即:,所以,2213(21)mk213(21)mk 由于,均为正整数,所以奇数必须是完全平方数,21m 21k 3(21)k 又因为,所以,且(),5mk2213kt 21tp*pN所以,当时,即:,不满足题意,舍弃;1t 213k 213m 2mk当时,即:,不满足题意,舍弃;3t 2127k 219m 5m 14k 当时,即:,5t 2175k 2115m 8m 38k 所以符合条件的一组的值可以是()mk,(838),(注:注:,即即的奇数均可,答案开放,满足题意的一组值即的奇数均可,答案开放,满足题意的一组值即5t 7t,5t 可可)12 分 22解:(1)的定义域为,()f xR()1 exfxx当时,当时,,1x ()0fx1,x ()0fx故在内单调递减,在单调递增,()f x,1 1,SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!第 8 页(共 8 页)学科网(北京)股份有限公司故要使有两个零点,则需,故,()f x1min()1e0f xfm 1em 当时,因为,又,10em111()e0mfmmmmm1e1m 故在内存在唯一零点,又,故在内存在唯一零点,()f x1,(0)0fm()f x1,0则在上存在两个零点,故满足题意的实数的取值范围为;6 分()f xRm1,0e(2)证明:由(1)可设,由可得,10ab eeababea bba令,解得,构造,0,1bta ln1ln1tatttbt lnln 11ttF ttt令,则,当时,当时,1lnh xxx 11h xx 0,1x()0h x1,x()0h x故在内单调递减,在单调递增,故,即,()h x0,11,11hhx111ln0 xx 令,故在定义域内单调递减,ln1xg xx1x 22111ln1ln011xxxxxgxxx g x故,即,故,1g tg tln1ln1ttttlnln11tttt 0F t 则,证毕 12 分 eee1F tabSG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!#QQABSYSAggiAQhAAARhCQQ2YCAGQkBGACIoGQBAAsAABQRNABAA=#SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!#QQABSYSAggiAQhAAARhCQQ2YCAGQkBGACIoGQBAAsAABQRNABAA=#SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!#QQABSYSAggiAQhAAARhCQQ2YCAGQkBGACIoGQBAAsAABQRNABAA=#SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 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#QQABAYYAoggAQgBAARgCQQHaCgGQkAEAAIoGABAAoAABwBNABAA=#SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!#QQABAYYAoggAQgBAARgCQQHaCgGQkAEAAIoGABAAoAABwBNABAA=#SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!#QQABAYYAoggAQgBAARgCQQHaCgGQkAEAAIoGABAAoAABwBNABAA=#SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!#QQABAYYAoggAQgBAARgCQQHaCgGQkAEAAIoGABAAoAABwBNABAA=#SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!第 1 页(共 8 页)学科网(北京)股份有限公司昆明一中 2024 届高三第 5 次联考 数学参考答案 命题、审题组教师命题、审题组教师 杨昆华杨昆华 彭力彭力 李文清李文清 李春宣李春宣 丁茵丁茵 王在方王在方 张远雄张远雄 李露李露 陈泳序陈泳序 杨耕耘杨耕耘 一、选择题一、选择题 题号 1 2 3 4 5 6 7 8 答案 D A B D C B C C 1解析:因为,所以,选 D 12iz 5z 2解析:因为,选 A 1,4A 1,2B 3解析:设直角圆锥底面半径,直角圆锥母线,直角圆锥的侧面展OCrACl开图的圆心角大小为,由直角圆锥的定义可得,则AOOCr2lACr,由可得,选 B 2lr2222rrlr4解析:在上单调递增,在tan()3yx5,66kk(Z)ksin(2)3yx5,1212kk上单调递增,在上单调递增,在(Z)kcos(2)6yx5,1212kk(Z)ksinyx,2kk上单调递增,则 A,B,C 错,选 D(Z)k5解析:因为直线分别与轴,轴交于,两点,所以,又因为点在圆+40 x yxyAB4 2AB P上,所以圆心为,则圆心到直线距离,故点到直线22(2)2xy0 2,10243 22dP+40 x y的距离的范围为,则,选 C 2d2 2 4 2,212ABPSAB dA8 16,6解析:由题意得,将代入,得2sincos3cos32sin22sincos1,则,选 B 23sin206sin3tan27解析:由题意,在有解,则有解,因为1()401fxaxx1,21114(1)4()12ax xx 在上单调增,得,则,选 C 21()4()12u xx1,()0u x 0a 8解析:因为每个人中奖的概率都为,与抽取的顺序无关,所以 A 错误;令“丁未中奖”为事件 A,14“甲或乙中奖”为事件 B,则,所以 B 错误;因为事3()4P A 111()442P AB()2(|)()3P ABP B AP A件“甲或乙中奖”与事件“丙或丁中奖”不可能同时发生且至少有一个发生,所以它们为对立事件,CSG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!第 2 页(共 8 页)学科网(北京)股份有限公司正确;设“丙中奖”为事件,“丁中奖”为事件,则,因为只有一张奖券可以中奖,所MN1()()4P MP N以事件,不可能同时发生,所以,所以,所以事件,不相互独MN()0P MN()()()P MNP M P NMN立,所以 D 不正确,选 C 二、多选题二、多选题 题号 9 10 11 12 答案 AC ACD ABD CD 9解析:因为回归方程的斜率为正,所以相关变量,具有正相关关系,所以 A 正确;由代入xy2x 得,去 除 两 个 异 常 数 据,和,后,得 到 新 的,1.50.6yx2.4y(27)(27)2 8863x,所 以 B 错 误;又 因 为 得 到 的 新 的 经 验 回 归 直 线 的 斜 率 为 3,所 以 由2.4 83.26y,所以去除异常数据后的经验回归方程为,故 C 正确;因为经验回833.234.83yx 34.8yx归直线的斜率为正数,所以变量,具有正相关关系,去除异常数据后,斜率增大,值增加的速度变xy y大,D 错误,选 AC 10解析:对于 A:由题意可得或,故 A 错误;/ll对于 B:由图象可得,则;所以,根据线面角的定义可得:与所成23CAD3DAB6ADBl角为,故 B 正确;6对于 C:若点恰好在交线上,则不一定垂直于另一个平面,当且仅当点不在交线上时,根据面面垂直的性质定理,才可得到垂线垂直于另一个平面,故 C 错误;对于 D:当平面内存在不共线的三点在平面的同侧且平面的距离相等,可得平面平面;当/平面内存在不共线的三点在平面的两侧时,若到平面的距离相等,则平面与平面相交,所以D 错误;选 ACD 11解析:由题,有 2,2C对于,因为,正确 222 24 2OOOBCA 对于,因为,所以,2PAPBPC PAPBBA 22224PAPBPA PBPC ,两 式 相 加 得,所 以2222PAPBPA PBBA 2222222444PAPBPCBAPCAC ,正确 22222PAPBPCAC 对于,当点与点重合时,与的夹角为,错误 AEOCCA 34SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!第 3 页(共 8 页)学科网(北京)股份有限公司对于,的面积为,正确 CDE2选 ABD 12解析:因为当时,的面积为,所以 A 错误;因为当时,0t 1AFB20t 12tan23AF F,当时,根据对称性,存在 使为直角三角123AF F1t 122 5tan15AF F124AF Ft1AFB形,所以 B 错误;根据椭圆对称性可知,当时,四边形面积最大,0t 12AF BF所以 C 正确;由椭圆的定义得:的 周 长,因 为1AFB112222(2)(2)4ABAFBFABaAFaBFaABAFBF,所以,当过点时取等号,22AFBFAB220ABAFBFAB2F所以,所以直线过椭圆的右焦点1122444 5ABAFBFaABAFBFa(11)xtt 2F时,的周长最大,所以 D 正确,选 CD 1AFB 三、填空题三、填空题 13解析:当时,得 0 x 0 x()21()xfxf x ()21xf x 14解析:当时,恒成立;当时,的解集为;综上,的解集0 x e0 x0 x 20 xx1,0()0f x 为)1,15 解 析:因 为,所 以;又 因 为,所 以,所 以532ppAF 6p 51cospAF1cos5 151cos2pBF16解析:由题知,为奇数,所以:,110()Bf B11B313266,为偶数,所以:,221()BfB22B1316410因为,为偶数,为奇数,222122122()()nnnnnnBfBffB2n21n 所以对于偶数项,得,21221nnBB 2214nnBBn22241nnBBn则为等差数列,得数列中:222nnBB2nB第项为:,23(41)0(374341)(21)2nnnnnn第项为:,43(374341)(21)3nnnn第项为:;67(374341)(21)7nnnn对于奇数项,得,212221nnBBn2212nnBB 22223nnBBnSG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!第 4 页(共 8 页)学科网(北京)股份有限公司则为等差数列,得数列中:222nnBB2nB第 项为:,1 1(23)2(12523)2(2)22nnnnnn 第 项为:,3 1(23)2(12523)2(2)22nnnnnn 第项为:,55(12523)(2)5nnnn 所以所有的项的和为 2nB 2(21)(21)3(21)7(2)2(2)2(2)59319nnnnnnn nn nn nnn所以为:,;的所有项的和 2B13164102nB29319nn 四、解答题四、解答题 17解:(1)证明:因为四边形为平行四边形,所以,ABCDABCD因为平面,且平面,所以平面,AB PCDCD PCDABPCD因为平面平面且平面,所以,ABEF PCDEFAB ABEFABEF所以 5 分 CDEF(2)建立如图所示的空间直角坐标系 Axyz由(1)知且,则,CDEF23EFCD2PEEC 则,0,0,0A3,0,0B0,0,3P0,6,0C0,4,1E,所以,3,6,0D 0,4,1AE 3,0,0AB 0,2,1EC ,设平面的一个法向量为,3,0,0DC ABEF1111,nx y z 则,得,1100nAEnAB 10,1,4n 设平面的一个法向量为,则,得,DCEF2222,nxyz 2200nECnDC 20,1,2n 则,121212187 85cos,85175nnn nnn 所以平面与平面夹角的余弦值为 10 分 BEFDFE7 8585 18解:(1)由题意得,所以左焦点为,右焦点为 134222bac)0,1(1F)0,1(2FFDACBzxyPESG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!第 5 页(共 8 页)学科网(北京)股份有限公司设点的坐标为,则,化简得,M),(yx22)1()1(|222221yxyxMFMF8)3(22yx所以点的轨迹方程为 6 分 M8)3(22yx(2)由(1)得,点的轨迹方程为,所以圆心到直线距离为,M8)3(22yx1 xy2所以直线与相交的线段,1 xyM62282|AB联立直线与的轨迹方程,1 xyE,得,134122yxxy08872 xx由根与系数的关系得.78,782121xxxx直线曲线相交的线段 1 xyC.724|1|212xxkCD所以 12 分.126772462|CDAB 19解:(1)因为,1 tantantantan()2 coscosBCBCCB所以,sin cossincos1sinsin()cos cos2 cos coscos cosBCCBBCBCCBCB所以,sin1sinsin()cos cos2 cos coscos cosABCBCCBCB所以,由正弦定理得:,2sinsinsinABC2bca因为,所以,的周长等于 6 分 3a 6bcABC9(2)由余弦定理得:,又由(1)得:,222+ccos2baAbc2bca2bca所以,2222222231+c()(+c)+c242cos222bcbbbcbaAbcbcbc而(当且仅当时取“”),222bcbcbc所以,223131(+c)214242cos222bbcbcbcAbcbc(当且仅当,即为正三角形时,取“”),abcABC又因为,余弦函数在上单调递减,0Acosyx0,SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!第 6 页(共 8 页)学科网(北京)股份有限公司所以,12 分 03A3 30tansin2AA 20解:(1)依题意:每 5 人一组需要验血次数的所有可能取值为,X16所以:,510.95P X 5610.95P X 所以的分布列为:X X 1 6 P 50.95 510.95所以 5551 0.95610.95650.952.131E X 所以共需要化验次数大约为:(次)100002.13142625故大约减少(次)6 分 1000042625738(2)假设个人一组,设每个人需要化验的次数为,kY若混合血样呈阴性,则,若混合血样呈阳性,则 1Yk11Yk 所以的分布列为:Y Y 1k 11k P 0.98k 10.98k所以 *110.981 10.9810.98kkkE Ykkkk N因为先减后增,10.98kkak,78781110.980.980.017307856aa78aa,981110.85080.83370.017109872aa 98aa所以当时,最小,最小值为:,8k=E Y 0.2742E Y 此时大约需要化验:次 12 分 100000.27422742 21解:(1)由已知得:,2321223baaa 354321222245baaaaaSG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!第 7 页(共 8 页)学科网(北京)股份有限公司因为,所以,2122nnaa221nnaa12(1)12121212nnnnnnbbaaaa而,所以是以 为首项,为公差的等差数列,111ba nb12所以数列的通项公式为 4 分 nb21nbn(2)不等式化为:,121111+)(1+)(1+)21npnbbb(12111(1+)(1+)(1+)21nbbbpn设,12111(1+)(1+)(1+)()21nbbbf nn则,2121(1+)21(1)224841()4832(1)1(21)(23)nnbf nnnnf nnnnnn所以在上单调递增,所以,因为在上恒成立,所以()f nnNmin2 3()(1)3f nf()f npnN,所以的取值范围为 8 分 min()f npp2 3(03,(3)若,(,)构成等比数列,则,2bmbkbmkN5mk22mkbbb即:,所以,2213(21)mk213(21)mk 由于,均为正整数,所以奇数必须是完全平方数,21m 21k 3(21)k 又因为,所以,且(),5mk2213kt 21tp*pN所以,当时,即:,不满足题意,舍弃;1t 213k 213m 2mk当时,即:,不满足题意,舍弃;3t 2127k 219m 5m 14k 当时,即:,5t 2175k 2115m 8m 38k 所以符合条件的一组的值可以是()mk,(838),(注:注:,即即的奇数均可,答案开放,满足题意的一组值即的奇数均可,答案开放,满足题意的一组值即5t 7t,5t 可可)12 分 22解:(1)的定义域为,()f xR()1 exfxx当时,当时,,1x ()0fx1,x ()0fx故在内单调递减,在单调递增,()f x,1 1,SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!第 8 页(共 8 页)学科网(北京)股份有限公司故要使有两个零点,则需,故,()f x1min()1e0f xfm 1em 当时,因为,又,10em111()e0mfmmmmm1e1m 故在内存在唯一零点,又,故在内存在唯一零点,()f x1,(0)0fm()f x1,0则在上存在两个零点,故满足题意的实数的取值范围为;6 分()f xRm1,0e(2)证明:由(1)可设,由可得,10ab eeababea bba令,解得,构造,0,1bta ln1ln1tatttbt lnln 11ttF ttt令,则,当时,当时,1lnh xxx 11h xx 0,1x()0h x1,x()0h x故在内单调递减,在单调递增,故,即,()h x0,11,11hhx111ln0 xx 令,故在定义域内单调递减,ln1xg xx1x 22111ln1ln011xxxxxgxxx g x故,即,故,1g tg tln1ln1ttttlnln11tttt 0F t 则,证毕 12 分 eee1F tabSG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!#QQABSYSAggiAQhAAARhCQQ2YCAGQkBGACIoGQBAAsAABQRNABAA=#SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!#QQABSYSAggiAQhAAARhCQQ2YCAGQkBGACIoGQBAAsAABQRNABAA=#SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 回复【试卷】领3000套+试卷!#QQABSYSAggiAQhAAARhCQQ2YCAGQkBGACIoGQBAAsAABQRNABAA=#SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885SG98885公众号搜试卷共享圈 回复【资料】领10T资资源!公众号搜试卷共享圈 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