山西省忻州二中2018_2019学年高一数学下学期周考试题(一)(无答案)
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山西省忻州二中2018-2019学年高一语文下学期周考试题(一)(无答案)(时间45分分值50分)一、基础知识(12分)1.下列各项中加点的字注音全部正确的一项是()A.俨然yǎn 阜盛bù伺候cì惴惴zhuì B.谬种mìu 呜咽yè簇拥cù宫绦tāoC.敕造chì烟霭ǎi 嫡亲dí驯熟xún D.杜撰zhuàn 模样m ó忖度cǔn 门槛kǎn2.下列各组词语中字形全部正确的一项是()A.寒暄雕梁画栋走头无路内帏厮混 B.诡密百无聊赖彩绣辉煌寻死觅活C.蹙缩文彩精华咀嚼赏鉴腮凝新荔 D.蹒跚俊眼修眉抄手游廊轩竣壮丽3.下列各句横线上填入的一组词语最为恰当的一项是()①我叫阿毛,没有应,出去一看,只见豆撒得一地,没有我们的阿毛了。
他是不到别家去玩的;各处去一问,__没有。
②这故事倒颇有效,男人听到这里,往往敛起笑容,没趣的走开去;女人们却不独__了她似的,脸上立刻改了鄙薄的神气,还要陪出许多眼泪来。
③黛玉虽不识,也曾听见母亲说过,大舅贾赦之子贾琏,娶的就是二舅母王氏之内侄女,自幼假充男儿__的,学名王熙凤。
A.果然宽恕教养 B.果然饶恕教育 C.竟然宽恕教育 D.竟然饶恕教养4.下列各句中加线的成语使用不正确的一项是()A.这些人个个皆敛声屏气,恭肃严整得如此,这来者系谁,这样放诞无礼?B.他嘴里一时甜言蜜语,一时有天无日,一时又疯疯傻傻,只休信他。
C.你自己荐她来,又合伙劫她去,闹得沸反盈天的,大家看了成个什么样子?D.直到指手画脚的将她和男人关在新房里,还是骂,阿呀呀,这真是……二、语段阅读(12分)阅读下面的文段,完成5-8题。
我回到四叔的书房里时,瓦楞上已经雪白,房里也映得较光明,极分明的显出壁上挂着的朱拓的大“寿”字,陈抟老祖写的,一边的对联已经脱落,松松的卷了放在长桌上,一边的还在,道是“事理通达心气和平”。
山西省忻州二中2018-2019学年高一物理下学期周考试题(三)(无答案)一、单选题(6*6=36分)1.如图所示,长为L的细绳一端固定,另一端系一质量为m的小球,如果给小球一个合适的初速度,小球便可在水平面内做匀速圆周运动,这样就构成了一个圆锥摆,设细绳与竖直方向的夹角为,下列说法中正确的是A.小球受重力、细绳的拉力和向心力作用B.细绳的拉力提供向心力C.越大,小球运动的线速度越小D.越大,小球运动的角速度越大2.如图,半径为R的光滑圆形管道竖直放置,管的内径很小,直径略小于管道内径的小球在管道内运动时,它经过最高点时速度为v1,经过最低点时速度为v2,则下列说法中正确的有()A.当小球以的速度经过与圆心等高的点时,圆管外壁对小球的作用力为mgB.若v1=,则小球经过最高点时对圆管的内壁有向下的作用力C.若v1=,则小球经过最高点时,圆管的内壁对球有作用力D.若v2=,则小球经过最低点时,圆管的外壁对球的作用力为5mg3.在物理学发展历史中,许多物理学家做出了卓越贡献.以下关于物理学家所作科学贡献的叙述中,正确的是()A.牛顿提出万有引力定律并测出引力常量GB.伽利略提出了“日心说”C.哥白尼测定了引力常量D.开普勒发现了行星运动三大定律4.如图所示,一同学分别在同一直线上的A、B、C三个位置投掷篮球,结果都垂直击中篮筐,速度分别为v1、v2、v3.若篮球出手时高度相同,出手速度与水平夹角分别为θ1、θ2、θ3,下列说法正确的是( )A.v1<v2<v3 B.v1>v2>v3 C.θ1>θ2>θ 3 D.θ1=θ2=θ35.假设地球和火星都绕太阳做匀速圆周运动,已知地球到太阳的距离小于火星到太阳的距离,那么( )A.地球公转的角速度大于火星公转的角速度B.地球公转的线速度小于火星公转的线速度C.地球公转的加速度小于火星公转的加速度D.地球公转周期大于火星的公转周期6.关于开普勒行星运动的公式32RkT,以下理解不正确的是( )A.k是一个与行星有关的常数 B.k是一个与恒星有关的常数C.T表示行星运动的公转周期 D.R表示轨道的半长轴二、多选题(3*8=24分)7.如图所示,为火车在水平路基上拐弯处的截面示意图,弯道的半径为R,轨道的外轨略高于内轨,轨道平面倾角为θ(θ很小)。
2018-2019学年高一数学下学期期中试题(含解析)一.选择题:(每题5分,共60分)1.下列结论正确的是().A. 若,则B. 若,则C. 若,,则D. 若,则【答案】C【解析】分析:根据不等式性质逐一分析即可.详解:A. 若,则 ,因为不知道c的符号,故错误;B. 若,则可令a=-1,b=-2,则结论错误;D. 若,则,令a=1,b=2,可得结论错误,故选C.点睛:考查不等式的基本性质,做此类题型最好的方法就是举例子注意排除即可.属于基础题.2.△ABC的内角A、B、C的对边分别为a、b、c.已知,,,则b=A. B. C. 2 D. 3【答案】D【详解】由余弦定理得,解得(舍去),故选D.【考点】余弦定理【名师点睛】本题属于基础题,考查内容单一,根据余弦定理整理出关于b一元二次方程,再通过解方程求b.运算失误是基础题失分的主要原因,请考生切记!3.《九章算术》“竹九节”问题:现有一根九节的竹子,自上而下各节的容积成等比数列,上面节的容积共升,下面节的容积共升,则第五节的容积为()A. 升B. 升C. 升D. 升【答案】C【解析】由题设可得,由此可得,故应选答案C .4.在中分别为角所对的边,若,则此三角形一定是( )A. 等腰直角三角形B. 直角三角形C. 等腰三角形D. 等腰三角形或直角三角形【解析】在中,,,此三角形一定是等腰三角形,故选C.【方法点睛】本题主要考查利用余弦定理判断三角形形状,属于中档题.判断三角形状的常见方法是:(1)通过正弦定理和余弦定理,化边为角,利用三角变换得出三角形内角之间的关系进行判断;(2)利用正弦定理、余弦定理,化角为边,通过代数恒等变换,求出边与边之间的关系进行判断;(3)根据余弦定理确定一个内角为钝角进而知其为钝角三角形.5.已知数列满足,,则数列的前6项和等于()A. B. C. D.【答案】C【解析】由得数列是以为公比的等比数列,所以,故6.函数的最大值为( )A. 1B.C. 2D.【解析】【分析】化简得到,得到答案.【详解】,故当时,函数有最大值.故选:.【点睛】本题考查了三角函数的最值,意在考查学生的计算能力.7.已知关于x的不等式ax2-x+b≥0的解集为[-2,1],则关于x 的不等式bx2-x+a≤0的解集为()A. [-1,2]B. [-1, ]C. [- ,1]D. [-1,-]【答案】C【解析】由题意得为方程的根,且 ,所以,因此不等式bx2-x+a≤0为,选C.8.已知等比数列满足,则=A. 1B.C.D. 4【解析】依题意有,故.9.在△ABC中,a=1,B=45°,S△ABC=2,则△ABC的外接圆的直径为()A. B. 5 C. D.【答案】C【解析】【分析】利用三角形面积公式列出关系式,将a,sinB以及已知面积代入求出c的值,再利用余弦定理求出b的值,最后利用正弦定理求出外接圆直径即可.【详解】∵在△ABC中,a=1,B=45°,S△ABC=2,∴acsinB=2,即c=4,∴由余弦定理得:﹣2accosB=1+32﹣8=25,即b=5,则由正弦定理得:2R5.故选C.【点睛】本题考查了正弦、余弦定理,以及三角形的面积公式,熟练掌握定理及公式是解本题的关键.10.当时,不等式恒成立,则k的取值范围是()A. B. C. D. (0,4)【答案】C【解析】当时,不等式可化为,显然恒成立;当时,若不等式恒成立,则对应函数的图象开口朝上且与轴无交点,则解得:,综上的取值范围是,故选C.11.已知等差数列的前项为,且,,则使得取最小值时的为().A. 1B. 6C. 7D. 6或7【答案】B【解析】试题分析:由等差数列的性质,可得,又,所以,所以数列的通项公式为,令,解得,所以数列的前六项为负数,从第七项开始为正数,所以使得取最小值时的为,故选B.考点:等差数列的性质.12.化简的值为()A. 1B. 2C. -1D. -2【答案】C【解析】原式===二.填空题(每题5分,共20分)13.已知,并且成等差数列,则的最小值为_________.【答案】16【解析】由题可得:,故14.在等差数列{an}中,若a1+a7+a13 = 6,则S13 = ______ .【答案】26【解析】【分析】根据得到,,得到答案.【详解】,故,.故答案为:.【点睛】本题考查了等差数列求和,意在考查学生对于数列性质的灵活运用.15.如图,正三棱柱的主视图面积为2a2,则左视图的面积为________.【答案】【解析】已知正三棱柱的主视图的底边长为,正三棱柱的主视图面积为,所以该正三棱柱的高为.因为正三棱柱的底面为边长为的正三角形,所以左视图的底边长为,所以左视图的面积为.16.在数列{an}中,a1=3, ,则通项公式an = ______.【答案】【解析】【分析】变换得到,利用累加法计算得到答案.【详解】,故..故答案为:.【点睛】本题考查了裂项相消法,累加法,意在考查学生对于数列方法的灵活运用.三.解答题(6个小题,共70分)17.解不等式:.【答案】答案不唯一,详见解析【解析】【分析】变换得到(x-k)(x-1)>0,讨论三种情况,计算得到答案.【详解】x2>(k+1)x-k变形为(x-k)(x-1)>0,当k>1时,不等式的解集是{x|x<1或x>k};当k=1时,不等式的解集是{x|x≠1};当k<1时,不等式的解集是{x|x<k或x>1};综上所述:时,解集为{x|x<1或x>k};时,解集是{x|x≠1};时,解集是{x|x<k或x>1}.【点睛】本题考查了解不等式,分类讨论是常用的数学方法,需要熟练掌握.18.在△ABC中,内角A,B,C的对边分别为a,b,c,且ccosB+bcosC=2acosA.(1)求A;(2)若a=2,且△ABC的面积为,求△ABC的周长.【答案】(1);(2)6.【解析】试题分析:(1)由根据正弦定理可得,利用两角和的正弦公式及诱导公式可得,∴;(2)由的面积为,可得,再利用余弦定理可得,从而可得的周长.试题解析:(1)∵,∴.∴,∴.∵,∴,∴,∴.(2)∵的面积为,∴,∴.由,及,得,∴.又,∴.故其周长为.19.已知公差不为零的等差数列{an}满足:,且是与的等比中项.(1)求数列{an}的通项公式;(2)设数列{bn}满足,求数列{bn}的前n项和Sn .【答案】(1)(2)【解析】试题分析:(1)根据等差数列通项公式列方程组,求出首项和公差即可得出通项公式;(2)利用裂项法求和.试题解析:(1)设等差数列{an}的公差为d,∵a3+a8=20,且a5是a2与a14的等比中项,∴,解得a1=1,d=2,∴an=1+2(n-1)=2n-1.(2)bn==(),∴Sn=b1+b2+b3+…+bn=(1-+-+…+)=(1-)=.点睛:本题主要考查了等差数列,以及数列的求和,属于高考中常考知识点,难度不大;常见的数列求和的方法有公式法即等差等比数列求和公式,分组求和类似于,其中和分别为特殊数列,裂项相消法类似于,错位相减法类似于,其中为等差数列,为等比数列等.20.在我校高二年段即将准备开展数学竞赛活动中,规定评选一等奖和二等奖的人数之和不超过10人,一等奖人数比二等奖人数少2人或2人以上,一等奖人数不少于3人,且一等奖奖品价格为30元,二等奖奖品价格为20元,怎样合理安排可以使得本次活动购买奖品的费用最少?【答案】本次活动购买奖品最小费用为190元.【解析】【分析】先根据条件列出线性约束条件,再根据条件画出可行域,根据目标函数画直线,找出最优解,求出最值.【详解】设一等奖人数为x,二等奖人数为y,本次活动购买奖品的费用为,目标函数为:,约束条件为画出满足条件的平面区域,联立,得设直线:,通过平移直线,易知z在点处取得最小值190,本次活动购买奖品的最小费用为190元.【点睛】本题考查的是线性规划问题,还考查了学生分析问题的能力和数学建模的能力已知两个变量间的关系,求它们的线性和最小,根据条件列出线性约束条件,再根据条件画出可行域,根据目标函数画直线,找出最优解,求出最值找最优解时注意斜率和倾斜角大小关系.21.设.(1)求的单调递增区间;(2)在锐角中,的对边分别为,若,求面积的最大值.【答案】(1)(2)【解析】【分析】(1)利用二倍角和两角和与差以及辅助角公式基本公式将函数化为的形式,将内层函数看作整体,放到正弦函数的增区间上,解不等式得函数的单调递增区间;(2)根据,求出,可得,利用余弦定理,利用基本不等式的性质求出的最大值,可得面积的最大值.【详解】解:(1).,由.可得:,函数的单调递增区间是:(2)由,即,可得,.由余弦定理:,可得.,当且仅当时等号成立.,.面积的最大值.故得三角形面积最大值为.【点睛】本题主要考查对三角函数的化简能力和三角函数的图题的关键.同时考查了余弦定理和不等式的性质的运用,属于中档题.22.已知数列的前项和为,.(Ⅰ)求数列的通项公式;(Ⅱ)求数列的前项和.【答案】(Ⅰ)();(Ⅱ)().【解析】试题分析:(Ⅰ)由写出当时,,两式相减可得数列的递推式,再求得,从而确定数列是等比数列,得通项公式;(Ⅱ)数列可以看作是一个等差数列和等比数列相乘所得,其前项和可用错位相减法求得.试题解析:(Ⅰ)由,①得,,②①②,得,即(,),所以数列是以3为首项,2为公比的等比数列,所以().(Ⅱ),,作差得,∴().点睛:本题考查错位相减法求和,对一个等差数列与一个等比数列相乘所得数列,其前项和可用错位相减法求解,首先写出和,然后在此式两边乘以等比数列的仅比,并错位,两式相减,可把和式转化为中间部分项是等比数列的和,应用等比数列求和公式可得结论.数列求和方法除直接应用等差数列和等比数列前项和公式外还有分组求和法、裂项相消法、错位相减法、倒序相加法等等.2018-2019学年高一数学下学期期中试题(含解析)一.选择题:(每题5分,共60分)1.下列结论正确的是().A. 若,则B. 若,则C. 若,,则D. 若,则【答案】C分析:根据不等式性质逐一分析即可.详解:A. 若,则 ,因为不知道c的符号,故错误;B. 若,则可令a=-1,b=-2,则结论错误;D. 若,则,令a=1,b=2,可得结论错误,故选C.点睛:考查不等式的基本性质,做此类题型最好的方法就是举例子注意排除即可.属于基础题.2.△ABC的内角A、B、C的对边分别为a、b、c.已知,,,则b=A. B. C. 2 D. 3【答案】D【解析】【详解】由余弦定理得,解得(舍去),故选D.【考点】余弦定理【名师点睛】本题属于基础题,考查内容单一,根据余弦定理整理出关于b一元二次方程,再通过解方程求b.运算失误是基础题失分的主要原因,请考生切记!3.《九章算术》“竹九节”问题:现有一根九节的竹子,自上而下各节的容积成等比数列,上面节的容积共升,下面节的容积共升,则第五节的容积为()A. 升B. 升C. 升D. 升【答案】C【解析】由题设可得,由此可得,故应选答案C .4.在中分别为角所对的边,若,则此三角形一定是( )A. 等腰直角三角形B. 直角三角形C. 等腰三角形D. 等腰三角形或直角三角形【答案】C在中,,,此三角形一定是等腰三角形,故选C.【方法点睛】本题主要考查利用余弦定理判断三角形形状,属于中档题.判断三角形状的常见方法是:(1)通过正弦定理和余弦定理,化边为角,利用三角变换得出三角形内角之间的关系进行判断;(2)利用正弦定理、余弦定理,化角为边,通过代数恒等变换,求出边与边之间的关系进行判断;(3)根据余弦定理确定一个内角为钝角进而知其为钝角三角形.5.已知数列满足,,则数列的前6项和等于()A. B. C. D.【答案】C【解析】由得数列是以为公比的等比数列,所以,故6.函数的最大值为( )A. 1B.C. 2D.【答案】A【解析】【分析】化简得到,得到答案.【详解】,故当时,函数有最大值.故选:.【点睛】本题考查了三角函数的最值,意在考查学生的计算能力.7.已知关于x的不等式ax2-x+b≥0的解集为[-2,1],则关于x的不等式bx2-x+a≤0的解集为A. [-1,2]B. [-1, ]C. [- ,1]D. [-1,-]【答案】C【解析】由题意得为方程的根,且 ,所以 ,因此不等式bx2-x+a≤0为 ,选C.8.已知等比数列满足,则=A. 1B.C.D. 4【答案】B【解析】依题意有,故.9.在△ABC中,a=1,B=45°,S△ABC=2,则△ABC的外接圆的直径为()A. B. 5 C. D.【答案】C【解析】【分析】利用三角形面积公式列出关系式,将a,sinB以及已知面积代入求出c的值,再利用余弦定理求出b的值,最后利用正弦定理求出外接圆直径即可.【详解】∵在△ABC中,a=1,B=45°,S△ABC=2,∴acsinB=2,即c=4,∴由余弦定理得:﹣2accosB=1+32﹣8=25,即b=5,则由正弦定理得:2R5.故选C.【点睛】本题考查了正弦、余弦定理,以及三角形的面积公式,熟练掌握定理及公式是解本题10.当时,不等式恒成立,则k的取值范围是()A. B. C. D. (0,4)【答案】C【解析】当时,不等式可化为,显然恒成立;当时,若不等式恒成立,则对应函数的图象开口朝上且与轴无交点,则解得:,综上的取值范围是,故选C.11.已知等差数列的前项为,且,,则使得取最小值时的为().A. 1B. 6C. 7D. 6或7【答案】B【解析】试题分析:由等差数列的性质,可得,又,所以,所以数列的通项公式为,令,解得,所以数列的前六项为负数,从第七项开始为正数,所以使得取最小值时的为,故选B.考点:等差数列的性质.12.化简的值为()A. 1B. 2C. -1D. -2【答案】C【解析】原式===二.填空题(每题5分,共20分)13.已知,并且成等差数列,则的最小值为_________.【答案】16【解析】由题可得:,故14.在等差数列{an}中,若a1+a7+a13 = 6,则S13 = ______ .【答案】26【解析】【分析】根据得到,,得到答案.【详解】,故,.故答案为:.【点睛】本题考查了等差数列求和,意在考查学生对于数列性质的灵活运用.15.如图,正三棱柱的主视图面积为2a2,则左视图的面积为________.【答案】【解析】已知正三棱柱的主视图的底边长为,正三棱柱的主视图面积为,所以该正三棱柱的高为.因为正三棱柱的底面为边长为的正三角形,所以左视图的底边长为,所以左视图的面积为.16.在数列{an}中,a1=3, ,则通项公式an = ______.【答案】【解析】【分析】变换得到,利用累加法计算得到答案.【详解】,故..故答案为:.【点睛】本题考查了裂项相消法,累加法,意在考查学生对于数列方法的灵活运用.三.解答题(6个小题,共70分)17.解不等式:.【答案】答案不唯一,详见解析【解析】【分析】变换得到(x-k)(x-1)>0,讨论三种情况,计算得到答案.【详解】x2>(k+1)x-k变形为(x-k)(x-1)>0,当k>1时,不等式的解集是{x|x<1或x>k};当k=1时,不等式的解集是{x|x≠1};当k<1时,不等式的解集是{x|x<k或x>1};综上所述:时,解集为{x|x<1或x>k};时,解集是{x|x≠1};时,解集是{x|x<k 或x>1}.【点睛】本题考查了解不等式,分类讨论是常用的数学方法,需要熟练掌握.18.在△ABC中,内角A,B,C的对边分别为a,b,c,且ccosB+bcosC=2acosA.(1)求A;(2)若a=2,且△ABC的面积为,求△ABC的周长.【答案】(1);(2)6.【解析】试题分析:(1)由根据正弦定理可得,利用两角和的正弦公式及诱导公式可得,∴;(2)由的面积为,可得,再利用余弦定理可得,从而可得的周长.试题解析:(1)∵,∴.∴,∴.∵,∴,∴,∴.(2)∵的面积为,∴,∴.由,及,得,∴.又,∴.故其周长为.19.已知公差不为零的等差数列{an}满足:,且是与的等比中项.(1)求数列{an}的通项公式;(2)设数列{bn}满足,求数列{bn}的前n项和Sn .【答案】(1)(2)【解析】试题分析:(1)根据等差数列通项公式列方程组,求出首项和公差即可得出通项公式;(2)利用裂项法求和.试题解析:(1)设等差数列{an}的公差为d,∵a3+a8=20,且a5是a2与a14的等比中项,∴,解得a1=1,d=2,∴an=1+2(n-1)=2n-1.(2)bn==(),∴Sn=b1+b2+b3+…+bn=(1-+-+…+)=(1-)=.点睛:本题主要考查了等差数列,以及数列的求和,属于高考中常考知识点,难度不大;常见的数列求和的方法有公式法即等差等比数列求和公式,分组求和类似于,其中和分别为特殊数列,裂项相消法类似于,错位相减法类似于,其中为等差数列,为等比数列等.20.在我校高二年段即将准备开展数学竞赛活动中,规定评选一等奖和二等奖的人数之和不超过10人,一等奖人数比二等奖人数少2人或2人以上,一等奖人数不少于3人,且一等奖奖品价格为30元,二等奖奖品价格为20元,怎样合理安排可以使得本次活动购买奖品的费用最少?【答案】本次活动购买奖品最小费用为190元.【解析】【分析】先根据条件列出线性约束条件,再根据条件画出可行域,根据目标函数画直线,找出最优解,求出最值.【详解】设一等奖人数为x,二等奖人数为y,本次活动购买奖品的费用为,目标函数为:,约束条件为画出满足条件的平面区域,联立,得设直线:,通过平移直线,易知z在点处取得最小值190,本次活动购买奖品的最小费用为190元.【点睛】本题考查的是线性规划问题,还考查了学生分析问题的能力和数学建模的能力已知两个变量间的关系,求它们的线性和最小,根据条件列出线性约束条件,再根据条件画出可行域,根据目标函数画直线,找出最优解,求出最值找最优解时注意斜率和倾斜角大小关系.21.设.(1)求的单调递增区间;(2)在锐角中,的对边分别为,若,求面积的最大值.【答案】(1)(2)【解析】【分析】(1)利用二倍角和两角和与差以及辅助角公式基本公式将函数化为的形式,将内层函数看作整体,放到正弦函数的增区间上,解不等式得函数的单调递增区间;(2)根据,求出,可得,利用余弦定理,利用基本不等式的性质求出的最大值,可得面积的最大值.【详解】解:(1).化简可得:,由.可得:,函数的单调递增区间是:(2)由,即,可得,.由余弦定理:,可得.,当且仅当时等号成立.,.面积的最大值.故得三角形面积最大值为.【点睛】本题主要考查对三角函数的化简能力和三角函数的图象和性质的运用,利用三角函数公式将函数进行化简是解决本题的关键.同时考查了余弦定理和不等式的性质的运用,属于中档题.22.已知数列的前项和为,.(Ⅰ)求数列的通项公式;(Ⅱ)求数列的前项和.【答案】(Ⅰ)();(Ⅱ)().【解析】试题分析:(Ⅰ)由写出当时,,两式相减可得数列的递推式,再求得,从而确定数列是等比数列,得通项公式;(Ⅱ)数列可以看作是一个等差数列和等比数列相乘所得,其前项和可用错位相减法求得.试题解析:(Ⅰ)由,①得,,②①②,得,即(,),所以数列是以3为首项,2为公比的等比数列,所以().(Ⅱ),,作差得,∴().点睛:本题考查错位相减法求和,对一个等差数列与一个等比数列相乘所得数列,其前项和可用错位相减法求解,首先写出和,然后在此式两边乘以等比数列的仅比,并错位,两式相减,可把和式转化为中间部分项是等比数列的和,应用等比数列求和公式可得结论.数列求和方法除直接应用等差数列和等比数列前项和公式外还有分组求和法、裂项相消法、错位相减法、倒序相加法等等.。
山西省忻州二中2018-2019学年高一数学10月月考试题(无答案)一、 选择题(每小题只有一个正确答案,每小题5分)1.下列各组对象中不能构成集合的是( ).A.2013年伦敦世锦赛全体参赛国家B.2015年全国经济百强县C.2013年全国五一劳动章获得者D.美国NBA 的篮球明星2.下列关系中正确的是( ).A.{})1,0(0∈B.{})1,0(1∈C.N ∈0D.+∈N 03.下列命题:①空集没有子集;②任何集合至少有两个子集;③空集是任何集合的真子集;④如果A ≠⊂φ,则φ≠A ,其中正确的有( ).A. 0个B. 1个C..2个D. 3个4.已知集合},01{2=-∈=x R x A 则有( ).A.A ∉-1B.A ⊆1C {}{}2,1,12,1-=-A D.{}{}12,1,1=-A 5.下列各组中,从集合P 到集合M 不能建立映射的是( ).A.{}0=P ,φ=MB.{}5,4,3,2,1=P ,{}8,6,4,2=M C.{}{}数轴上的点,有理数==M PD.{}{}有序实数对,平面上的点==M P6.已知函数[],2,1,3)(∈=x x x f 则)(x f 的最大值为( ).A.2B.4C.6D.87.函数222+-=x x y 在[]3,2-上的最大值、最小值为( ). A.10,5 B.10,1C.5,1D.以上都不对8.若奇函数)(x f 在区间[]7,3上递增且最小值为5,则)(x f 在[]3,7--上为( ).A.增函数且最小值为-5B.增函数且最大值为-5C.减函数且最小值为-5D.减函数且最大值为-5二、 填空题(将答案填在题后的横线上,每小题5分)9.若集合{}{}a x x B x x A ≥=≤=,2满足{}2=B A ,则实数a= . 10.函数xx x y -++=132的定义域是 . 11.已知函数,0),2(0,)(2⎩⎨⎧>-≤=x x f x x x f 则=)4(f ________. 12.二次函数c bx x x f ++=2)(的图像关于2=x 对称,则)1(f 、)2(f 、)4(f 的大小关系为____________.三、 解答题(要求写出详细步骤与过程)13.(10分)已知集合{}{}723),(,64),(=+==+=y x y x B y x y x A ,求B A ,B A .14.(10分)(1)已知,54)(-=x x f 求()[]x f f .(2)已知)(x f 为一次函数且()[],2516-=x x f f 求)(x f .15.(10分)证明函数x x x f 1)(+=在(0,1)上是减函数.16.(10分)已知)(x f 是定义在区间[]1,1-上的增函数,且)1()2(x f x f -<-,求x 的取值范围.。
山西省忻州二中2018-2019学年高一英语下学期周考试题(一)(无答案)第一部分英语知识应用(共两节,满分35分)第一节语法和词汇(共15小题;每小题1分,满分15分)1. What the writer wanted to express in his book doesn’t make any ___ to the readers.A. meaningB. importanceC. senseD. significance2. While I was walking along the street after dinner, a terrible thought suddenly ___ me—had I locked the door?A. occurredB. happenedC. struckD. beat3. My cousin knows a little Japanese, ___ he can’t understand the instructions on the bottle of the pills.A. soB. orC. butD. for4. —How’s your study going lately?—___. I failed this time again.A. That couldn’t be betterB. I couldn’t agree moreC. It’s none of your businessD. It couldn’t be worse5. The news of the President’s death was ___ in a radio broa dcast and the whole nation was in great sorrow.A. put outB. found outC. given outD. turned out6. The reason ___ he gave for his absence from the party was ___ he had an un-expected visitor.A. why; becauseB. which; whetherC. that; thatD. for which; because7. Mr. Smith keeps healthy after his retirement by having a healthy diet and ___ plenty of exercise every day.A. takingB. takeC. takesD. to take8. All the tasks ___ ahead of time, so I decided to go to the beach with my daughter on holiday for a week.A. finishedB. had been finishedC. have been finishedD. are finished9. The mobile phones in this store are equal in price to, if not cheaper than, ___ at the other stores.A. thoseB. onesC. oneD. that30. As far as I know, the sports meet has been put off until next week ___ the bad weather.A. in case ofB. in spite ofC. instead ofD. because of11. —We ___ missed hitting the other car.—You can never be too careful when driving.A. narrowlyB. nearlyC. hardlyD. closely12. —Do you still remember who is the first man ___ foot on the moon?—Neil Armstrong.A. setB. to settingC. settingD. to set13. —How do you like Jane?—___ she is a likeable girl she can be extremely difficult to work with.A. AsB. SinceC. IfD. While14. I hope you won’t ___ any information —you are the only person who witnessed the traffic accident.A. hold upB. hold backC. hold onD. hold out15. During ___ Second World War, Germany was at ___ war with almost all the countriesin Europe.A. a; theB. the; aC. \; \D. the; \第二节完形填空 (共20小题;每小题1分,满分20分)December 24 arrived along with heavy snow. It was my first Christmas Eve without my mothe r, and the day’s 16 excitement had disappeared.The telephone rang. I 17 it and went to my bedroom, knowing it must be my 18 Rebecca calling. I was 19 to be at her house for dinner. 20 could I be happy?I want to be left 21 .My heart felt as 22 as the falling snow. How did I stop missing my mother? I looked 23 the window. Seeing Rebecca’s car parked out front, I went back to bed and drew the covers over my 24 .“Lucy!” she shouted. “I know you’re in there.Answer the door!”“Leave me alone!” I 25 back.I heard paper rustling(沙沙作响) as she slid 26 under the door.“Merry Christmas,” she called out.Not answering the door 27 me feel worse. It wasn’t fair to my best friend. Her father and sister died in a car 28 when she was eight years old. 29 , her mother had to return to 30 , and Rebecca was left to look after herself.When she left, I carried the small package, sat down and 31 it: a gold pen and a journal. When I opened the front cover, out fell a bookmark with a 32 on it: Dear Lucy,My words won’t heal the 33 . But your own words can.Love,RebeccaI 34 at the blank pages, a single tear fell and the page absorbed it.That night, I 35 the phone and dialed her number.“Looks like the snow is melting(融化),” I said, “Spring was just around the corner.”16. A. fast B. easy C. usual D. long17. A. ignored B. answered C. picked D. covered18. A. roommate B. guide C. teacher D. friend19. A. hoped B. supposed C. suggested D. allowed20. A. Where B. When C. How D. Why21. A. lonely B. active C. crazy D. alone22. A. gentle B. heavy C. white D. clear23. A. through B. out C. up D. into24. A. head B. hand C. mouth D. body25. A. took B. brought C. shouted D. turned26. A. everything B. anything C. nothing D. something27. A. forced B. got C. caused D. made28. A. delay B. event C. accident D. incident29. A. In turn B. As a result C. By chance D. On the contrary30. A. teach B. repair C. wash D. work31. A. opened B. closed C. folded D. locked32. A. notice B. news C. note D. warning33. A. happiness B. hope C. pain D. failure34. A. glared B. fixed C. glanced D. stared35. A. picked up B. pused back C. put away D. gave away第二部分阅读理解(共20小题;每小题2分,满分40分)AFinland is perhaps the most beautiful and mysterious(神秘的) country of Northern Europe. Two-thirds of its surface is covered with thick forests and among them lie lakes, connected with rivers and canals. The northern part of this country is inside the Arctic Circle, where almost no trees can grow because of its cold weather and the people use their deer for transport, clothing and food.The Finnish history began in the Middle Ages. In about 1155, Finland was con-quered(占领) by its western neighbour Sweden. After a period of rule by Denmark in the 14th century, the Swedes won back independence (独立) and power in 1523 under their brave king. During the Napoleonic Wars (1814-1818) Finland was passed finally from Sweden to Russia. The opportunity came in 1917, when the Russian Revolution brought foreign rule of Finland to an end. Shortly after Soviet Russia made peace with Germany, 1919 saw the founding of the Finnish Republic.The years between the First and Second World Wars were years of progress and growing development. Finland has no coal or oil, and the nation’s wealth lies in the wood from its forest, which supplies material for paper and furniture making, and in the electric power from its water.36. From the passage, we learn that Finland ___.A. lies inside the Arctic CircleB. is next to the countries of Northern EuropeC. lies east of SwedenD. is all covered with forests and lakes37. In the history, Finland was sequently (相继)ruled by ___.A. Sweden, Germany, Denmark and RussiaB. Sweden, Denmark, Sweden and RussiaC. Sweden, Denmark, Russia and GermanyD. Sweden, Russia, Denmark and Russia38. Finland must have been under the control of ___ at last.A. RussiaB. DenmarkC. SwedenD. A country not mentioned39. Finland won its complete independence in ___.A. 1532B. 1917C. 1818D. 191940.Among natural resources, the Finland people benefit mainly from ___.A. coal and oilB. forests and waterC. paper and furnitureD. wood and power industryBIt took me eighteen years to realize what a big influence my mother has been on my life. She’s the kind of person who has thoughtful discussions, and she always has time for her four children. She is also the kind of community(社区) leader who has a seat on the board of every big project. Growing up with such a strong role model, I developed much of her enthusiasm(热情). I not only came to love the happiness of learning simply for knowing something new, but also came to understand the idea of giving back to the community in exchange for a new sense of life, love, and spirit. My mother’s enthusiasm for learning is most apparent in travel. I was nine years old when my family visited Greece. Every night of the three weeks before the trip, my elder brother Peter and I sat with mother on her bed reading Greek myths and taking notes on the Greek Gods. Although we were traveling with fourteen-month-old twins, we still managed to go to every place we wanted to visit. I have learned about global history, politics and culture, as well as my family and myself.The experiences I’ve had at home and abroad have been spectacular(壮观的). My mother has enriched my life with her love for learning, and changed it with her devotion(奉献) to humanity. With her endless love for everything and everyone, I’ve seen a hope and lif e. Next year, I’ll find a new home miles away. However, my mother will always be by my side.41. The mother’s influence on the author’s life includes the following EXCEPT ___.A. being crazy about politicsB. assistance of othersC. love of lifeD. enthusiasm of knowledge42 The underlined word “apparent” is the nearest in meaning to ___.A. pleasedB. obviousC. crazyD. available43. We can learn from the passage that the author ___.A. will leave his mother next yearB. didn’t use to understand his motherC. has two brothersD. is sure to become a devotional person to society44. Which is the most proper word to describe the author’s emotion(情感) towards his mother?A. Grateful.B. Regretful.C. Proud.D. Pitiful.45. According to the passage, which of the following is NOT true?A. The author will turn 20 next year.B. There are five people in the author’s family.C. Although Peter was fourteen-month-old, they still had a good time when traveling.D. The author began to treat his mother as his model when he was nine.C“I didn’t think drugs were a big deal.”“My mom started having drugs when I was in fourth grade, so when a friend o ffered me weed(烟草) in seventh grade, it didn’t seem wrong to try it. Drink made me feel distant from my misery at home, and I started smoking and drinking on a daily basis. Then my mother left. It broke my heart—I felt like she chose drugs over me. But that didn’t make me stop using them. I relied on weed to handle my pain and anger.I moved in with my dad, but he drank a lot and we argued. I’d avoid going home, staying out with friends instead, drinking and getting high. Before, I only smoked for fun, but now I depended on it to help me through each day.When I turned 18, I went to California and tried to start my life over. But I felt isolated there. I was smoking weed every day. Getting high was all I had, and it scared me. I realized I was just running from my problems. I called my dad and told him I wanted to back home.I can happily say I’ve been off drugs for nearly a year now. My dad has also been sober(清醒的)for several months, and it’s a lot easier for us to get along now that drugs aren’t in the way. I’ve made new friends, too—my best friend is a girl from high school who didn’t do drugs or drink. I still don’t see my mom much, and I don’t know if we’ll ever be close again. All I know is that I don’t want to waste my life like she did. I’ll never go back to the person I was—I would rather be the girl I always dreamed I could be!”—Megan 18FACT: “Nobody knows how drug use is going to affect them,” Simon says. “You’r e playing Russian roulette(一种赌博). Once you start, you can’t be sure you’ll walk away.”46. Why did Megan choose to do drugs when she was in seventh grade?A. She tried to win the heart of her mom.B. She wished to keep herself out of her family troubles.C. She wanted to learn from her mom.D. She wanted to kill herself in this way.47. Why did Megan’s heart break according to the passage?A. Her father drank too much.B. She had to depend on smoking through each day.C. Her mother deserted her.D. She became an orphan.48. What does Megan mean by saying “I didn’t think drugs were a big deal”?A. Drugs were no harm at all.B. All her friends were drug addicts.C. Her mom started taking drugs when she was only in the fourth grade.D. She was brave enough to handle drugs.49. Which of the following statements about Megan is NOT right?A. She wants to completely break away from her past.B. She just can’t tear herself away from drug using.C. She gets along well with her dad now.D. She quitted using drugs nearly a year ago.50. What does the underlined sentence mean in the last paragraph?A. Drug using is easy to give up.B. Russian people enjoys using drugs.C. Drug using is addictive.D. Playing Russian roulette is a shame.DA great white shark in a California aquarium(水族馆) attacked two soupfin sharks (翅鲨), causing their deaths. The attack was not a natural action for food, but out of response when the two sharks swam too close to the great white. The great white has not attacked other fellows, and officials have moved other soupfin sharks to another tank(贮水池) for their safety.These attacks have given rise to calls for the freedom of the 88-pound, 5-foot-3-inch shark. The aquarium houses the shark in a million-gallon tank. However, according to experts, the tank is not big enough for the shark. Its nose is bloody from striking the glass of the aquarium. Great white sharks in the wild have a huge amount of migration, sometimes traveling 50 miles a day. Because the shark is still young, there is possibility of his growing. As it grows, it can become more troubled with the limited space.Aquarium officials say that keeping the shark in the aquarium allows them to study behavior that they cannot study with free great white sharks. With the studied behavioral patterns, scientists believe that they can then help great white sharks in the wild.Since the shark has been on display, aquarium attendance has increased. The one-year-old shark is the longest surviving great white living here. It has been at the Monterey Bay Aquarium for six months. Other great whites have not survived for longer than 16 days.51. A great white shark’s attacking two soupfin sharks is directly because of ___.A. the hunger of the great white sharkB. the limited space of the aquariumC. the fight between them for foodD. their close touch with each other52. The underlined word “migration” probably means ___.A. movementB. fightingC. growthD. freedom53. If the great white shark still stay in the aquarium, it would probably ___.A. be killedB. feed on more soupfin sharksC. stop growingD. feel less comfortable54. According to aquarium officials, what can be learned?A. The great white shark can live longer in the aquarium.B. The great white shark will be set free from the aquarium.C. The great white shark should be kept in the aquarium.D. The great white shark has been used to living in the aquarium.55. What would be the best title for this passage?A. California Aquarium Houses SharksB. Shark Kills Two Others in AquariumC. Ways for Sharks to Survive LongerD. Behavior Study on Great White Sharks第三部分书面表达(共二节,满分25分)第一节阅读表达(共10小题;每小题1分,满分10分)The tallest building in the world was the World Trade Centre t_________(1) towers, which were built in New York in 1972, one measuring 417 metres high and the o_________(2) 415. It is a pity that they were d_________(3) in September 2001. Though most of the tallest buildings in the world were built in the 1990s and in the twenty-first century, the Empire State Building, the second tallest building in the US, was built much e_________(4), which was finished in May 1931. It was the tallest building at the time, and c_________(5) to be so until 1972, when the World Trade Centre twin towers came up. The Empire State Building was built up with ten million b_________(6) and it has 6,500 windows in all. People can see as far as five US states from the observatory at the t______(7) on a clear day. It is so high that l_________(8) strikes the Empire State Building about 500 times a year. In 1945, on a f_________(9) day, a US military plane was flying over Manhattan and crashed into the Empire State Building just a_________(10) the 78th floor.第二节书面表达(满分15分)假定由你负责接待一个外国旅游团。
山西省忻州市高一下学期数学期中考试试卷姓名:________ 班级:________ 成绩:________一、单选题 (共11题;共22分)1. (2分) (2018高一上·浙江期中) 设集合,,则A .B .C .D .2. (2分)已知两组样本数据的平均数为h,的平均数为k, 则把两组数据合并成一组以后,这组样本的平均数为()A .B .C .D .3. (2分) (2018高二下·牡丹江月考) 样本()的平均数为,样本()的平均数为,若样本(,)的平均数,其中,则的大小关系为()A .B .C .D . 不能确定4. (2分)已知平面向量若与垂直,则实数=()A . -1B . 1C . -2D . 25. (2分)已知复数,为z的共轭复数,则下列结论正确的是()A .B .C .D .6. (2分)计算(5-5i)+(-2-i)-(3+4i)=()A . -2iB . -10iC . 10D . -27. (2分)在中,,,则的最小值是()A .B . 2C .D . 68. (2分) (2016高二下·韶关期末) 已知| |= , =(1,2),且⊥ ,则的坐标为()A . (﹣2,﹣1)或(2,1)B . (﹣6,3)C . (1,2)D . (2,﹣1)或(﹣2,1)9. (2分) (2015高三上·青岛期末) 在△ABC中,角A,B,C所对的边分别是a,b,c,若b2+c2=a2+bc,=4,则△ABC的面积等于()A .B . 4C . 4D . 210. (2分) (2016高一下·卢龙期中) 已知 = , = , = ,则()A . A、B . D三点共线 B.A、C . C三点共线D . C、D三点共线11. (2分)已知平面向量=(x1 , y1),=(x2 , y2),若||=2,||=3,•=﹣6,则的值为()A . -2B . 2C . -D .二、填空题 (共9题;共9分)12. (1分) (2019高二上·兴庆期中) 已知样本的平均数是,标准差是,则的值为________13. (1分) (2018高二下·石家庄期末) 已知为虚数单位,复数满足,则 ________.14. (1分)(2019·黄浦模拟) 若球主视图的面积为,则该球的体积等于________15. (1分)如图,矩形O′A′B′C′是水平放置的一个平面图形的直观图,其中O′A′=6,O′C′=2,则原图形OABC的面积为________.16. (1分) (2018高二上·云南期中) 已知向量满足 ,则 ________17. (1分)已知向量AB,,则________ .18. (1分)(2018·河北模拟) 已知平面向量,,且,则在方向上的投影是________.19. (1分)在航天员进行的一项太空实验中,要先后实施6个程序,其中程序只能出现在第一或最后一步,程序和在实施时必须相邻,则实验顺序的编排方法共有________种(用数字作答).20. (1分) (2018高二上·西安月考) 在中,,,的角平分线,则 ________.三、解答题 (共4题;共45分)21. (10分) (2017高一下·赣州期末) 已知向量 =(3,4), =(﹣1,2).(1)求向量与夹角的余弦值;(2)若向量﹣λ 与 +2 平行,求λ的值.22. (15分)(2016·天津理) 某小组共10人,利用假期参加义工活动,已知参加义工活动次数为1,2,3的人数分别为3,3,4,. 现从这10人中随机选出2人作为该组代表参加座谈会.(1)设A为事件“选出的2人参加义工活动次数之和为4”,求事件A发生的概率;(2)设为选出的2人参加义工活动次数之差的绝对值,求随机变量的分布列和数学期望.23. (5分)(2017高一下·正定期末) 在中,分别是角的对边,且.(Ⅰ)求的大小;(Ⅱ)若,求的面积24. (15分) (2018高三上·昭通期末) 已知函数.(I)求不等式f(x)≤6的解集;(II)若f(x)的最小值为n,正数a,b满足2nab=a+2b,求2a+b的最小值.参考答案一、单选题 (共11题;共22分)1-1、2-1、3-1、4-1、5-1、6-1、7-1、8-1、9-1、10-1、11-1、二、填空题 (共9题;共9分)12-1、13-1、14-1、15-1、16-1、17-1、18-1、19-1、20-1、三、解答题 (共4题;共45分) 21-1、21-2、22-1、22-2、23-1、24-1、。
2018-2019学年第一学期期中考试题高 一 数 学本试卷分第Ⅰ卷和第Ⅱ卷两部分。
第Ⅰ卷为选择题, 共60分;第Ⅱ卷为非选择题90分。
全卷共150分,考试时间为120分钟第 Ⅰ 卷 (选择题,共60分)一.选择题(本大题共12小题,每题给出的四个选项中,只有一项符合题目要求)1.设全集U =R ,A ={x|x >0},B ={x|x >1},则A ∩U B =( ).A .{x|0≤x <1}B .{x|0<x ≤1}C .{x|x <0}D .{x|x >1} 2.下列四个图形中,不是以x 为自变量的函数的图象是( ).A B C D3.已知函数 f(x)=x 2+1,那么f(a +1)的值为( ).A .a 2+a +2B .a 2+1C .a 2+2a +2D .a 2+2a +14.下列等式成立的是( ).A .log 2(8-4)=log 2 8-log 2 4B .4log 8log 22=48log 2C .log 2 23=3log 2 2 D .log 2(8+4)=log 2 8+log 2 45.下列四组中的f(x),g(x),表示同一个函数的是( ).A .f(x)=1,g(x)=x 0B .f(x)=x -1,g(x)=x x 2-1C .f(x)=x 2,g(x)=(x )4D .f(x =x 3,g(x)=39x6. 图中的图象所表示的函数的解析式为( ).A .y =23|x -1|(0≤x ≤2) B .y =23-23|x -1|(0≤x ≤2)C .y =23-|x -1|(0≤x ≤2)D .y =1-|x -1|(0≤x ≤2)7.幂函数y =x α(α是常数)的图象( ). A .一定经过点(0,0) B .一定经过点(1,1) C .一定经过点(-1,1) D .一定经过点(1,-1)8.方程2x=2-x 的根所在区间是( ). A .(-1,0) B .(2,3) C .(1,2) D .(0,1) 9.若log 2 a <0,b⎪⎭⎫⎝⎛21>1,则( ).A .a >1,b >0B .a >1,b <0C .0<a <1,b >0D .0<a <1,b <010.已知f(x)在R 上是奇函数,f(x +4)=f(x),当x ∈(0,2)时,f(x)=2x 2,则f(7)=( ). A .-2 B .2 C .-98 D .9811.下列函数f(x)中,满足“对任意x 1,x 2∈(0,+∞),当x 1<x 2时,都有f(x 1)>f(x 2)的是( A ).A .f(x)=x 1B .f(x)=(x -1)2C .f(x)=e xD .f(x)=ln(x +1)12.已知函数f(x)=⎩⎨⎧0≤30log 2x x f x x ),+(>,,则f(-10)的值是( ). A .-2B .-1C .0D .1第Ⅱ卷(非选择题 共90分)二、填空题(本题共4小题,每题5分,满分20分)13.函数x x y +-=1的定义域是__________ .14.用100米扎篱笆墙的材料扎一个矩形羊圈,欲使羊的活动范围最大,则应取矩形长__________ 米,宽 __________ 米.15. 已知集合A ={0,1,2},则集合A 的真子集共有__________个.16.若f(x)=(a -2)x 2+(a -1)x +3是偶函数,则函数f(x)的增区间是__________。
山西省忻州实验中学2018-2019学年高一数学下学期第一次月考试题本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分,共150分.考试时间120分钟.第Ⅰ卷(选择题 共60分)一、选择题(每小题5分,共60分。
下列每小题所给选项只有一项符合题意,请将正确答案的序号填涂在答题卡上)1、600sin 的值是( )A . 23-B .23C .21D . 21-2.圆弧长度等于其所在圆内接正三角形的边长,则该圆弧所对圆心角的弧度数为( ) A.π3 B.2π3 C. 3 D .2 3.若α为第三象限角,则cos α1-sin 2α+2sin α1-cos 2α的值为( )A .3B .-3C .1D .-1 4.若sin(π+α)+cos ⎝⎛⎭⎪⎫π2+α=-m ,则cos ⎝ ⎛⎭⎪⎫3π2-α+2sin(6π-α)的值为( )A .-23mB .-32m C.23m D.32m5.已知21tan -=α,则αααα22cos sin cos sin 2-的值是( ) A .34- B .3 C .34D .3-6.tan 10°+tan 50°+tan 120°tan 10°tan 50°的值等于( )A .-1B .1 C. 3 D .- 3 7.已知函数20,0)sin()(πϕωϕω,(>>+=A x A x f )在一个周期内的图象如图所示.若方程m x f =)(在区间],0[π上有两个不同的实数解21,x x ,则21x x +的值为( )A .3π B .π32 C .π34 D .3π或π34 8.下列关系式中正确的是( )A .sin 11°<cos 10°<sin 168°B .sin 168°<sin 11°<cos 10°C .sin 11°<sin 168°<cos 10°D .sin 168°<cos 10°<sin 11°9.函数y =x cos x +sin x 的图象大致为( )10.下列关于函数y =)3tan(π+x 的说法正确的是( )A .在区间⎪⎭⎫⎝⎛-65,6ππ单调递增 B .最小正周期是π C .图象关于点⎪⎭⎫⎝⎛0,4π成中心对称 D .图象关于直线x =π6成轴对称11.设函数f (x )=cos ωx (ω>0),将y =f (x )的图象向右平移π3个单位长度后,所得的图象与原图象重合,则ω的最小值等于( )A. 13 B .3 C .6 D .9 12.已知函数211()sin sin (0)222xf x x ωωω=+->,R x ∈.若)(x f 在区间)2,(ππ内没有零点, 则ω的取值范围是A .]81,0( B .)1,85[]41,0( C .]85,0( D .]85,41[]81,0(第Ⅱ卷(非选择题 共90分)二、填空题(每题5分,共20分。
-1 - / 2山西省忻州二中学年高一数学下学期周考试题(二) (无答案)一、选择题(每题分,共分) 、下列命题正确的是( )O .第二象限角必是钝角 相等的角终边必相同 .终边相同的角一定相等 • 不相等的角终边必不相同 、已知 是第四象限角,则角一的终边在( )O 2 .第一象限角 •第一或第三象限 • 第四象限 • 第二或第四象限 、已知角 的终边与°角的终边点和轴对称,则角 一是( )O 2 .第二或第四象限角 第一或第三象限角 .第三或第四象限角 第一或第四象限角 、若 5,则角的终边在( )° .第一象限 • 第二象限 • 第三象限 • 第四象限 、给出下列三角函数值:(°);(—);,其中符号为负的个数是( )° 4、已知函数y log a (x 2) 4 ( >且工)的图像过定点,且a 的终边经过点,则a ()3 34 45 5 . 5 5 、已知角 的终边过点(, °),且 4 小 ,则()。
5 1 1 .3.2 . 2 . 2 . 2 、已知角是第三象限角,化简..1 sin .. 1 sin 得()O\ 1 sin A 1 sinsin (— ) cos ( )、已知,贝U 2 ( )OsirKy ) sin ( )23二、填空题(每空分,共分)为第三象限角,则 coscos 2 si n sin | 的值为(-2 - / 2.13 13 、sin cos -------------- 6 3 、角的终边经过点(2,则化简 J 2sin 2cos 2 ; 2sln 2COS 2 的结果是 . J3 … 5 、 、已知 cos( ) ,贝V cos( ) 。
6 3 6 三、解答题(每题分,共分) 、已知角 的终边经过点(,)(^),求 、 、 的值。
、已知< < n, ()求 的值;cos( ()化简f();1()若f () 一,求tan 的值;3()若 f() 一,求 f(5 );3 6 ()求 2sin 2 2 sin cos cos 的值。
山西省忻州二中2018-2019学年高一数学下学期周考试题(一)(无答
案)
一、选择题(每题5分,共30 分)
1、与-20°角终边相同的角是( )
A 380°
B 340°
C -700°
D 1100°
2、如果角α的终边上有一个点P (0,-3),那么角α( )
A 是第三象限角
B 是第四象限角
C 是第三或第四象限角
D 不属于任何象限角
3、角π12
29-的终边所在的象限是第( )象限
A 一
B 二
C 三
D 四
4、已知角α的终边与单位圆的交点P (,555
52-),则sin α+cos α=( ) A 55 B 55- C 552 D 5
52-
5、在△ABC 中,若sinAcosC<0,则△ABC 是( )
A 钝角三角形
B 直角三角形
C 锐角三角形
D 不能确定
6、=--=+1sin cos 21cos sin 1x x x x ,则已知
( ) A 21 B 2
1- C 2 D 2- 二、填空题(每题5分,共20 分)
7、cos450°=
8、已知角α终边经过点(sin60°,cos60°),则tan α=
9、已知角α∈(π,3π/2)且tan α=2,则cos α=
10、已知sin αcos α=81,且,
24π
απ<<则cos α-sin α= 三、解答题(11、12、13每题12分,14题14分,共50分)
11、已知角α的终边在直线3x+4y=0上,求sin α、cos α、tan α的值。
12、化简
x x x x sin 1sin 1sin 1sin 1+---+,其中α为第三象限角。
13、已知)
sin()5.3sin()5.1cos()(πθθππθθ--+-=f (1)化简)(θf
(2)若的值求θθtan ,3
1)(=f
14、一个扇形的周长为20㎝,当扇形的圆周角α等于多少弧度时这个扇形的面积最大,并求出这个扇形的最大面积。