复附青分高三周练01(2019.09)

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华二附中高三周练01(2019.09)

华二附中高三周练01(2019.09)

华二附中高三周练数学卷012019.09一. 填空题1. 定义在R 上的奇函数()f x 以2为周期,则(1)f =2. 若复数1i()1ib b +∈+R 的实部和虚部互为相反数,则b = 3. 若(12)n x +展开式中含3x 项的系数等于含x 项的系数的8倍,则n = 4. 若126x y x y ≥⎧⎪≥⎨⎪+≤⎩,则目标函数2z x y =+的最小值为5. 点P 是椭圆2212516x y +=上一点,1F 、2F 是椭圆的两个焦点,且12PF F ∆的内切圆半径为1, 当P 在第一象限内时,点P 的纵坐标为6. 数列{}n a 满足:1,21,3nn nn a n ⎧⎪⎪=⎨⎪⎪⎩为奇数为偶数,它的前n 项和记为n S ,则lim n n S →∞=7.2kx -仅有一个实数根,则k 的取值范围是8. 若A 地位于北纬40︒,东经110︒,B 地位于北纬40︒,东经70︒,且地球半径取为6371R =km ,则AB 两地的球面距离为 km .(精确到1km )9. 已知2AB =,3B π∠=,AC b =,若b M ∈时,ABC V 能唯一确定,则集合M =10. 时老师、杨老师、王老师同在某学校工作,若该学校规定,每位老师可以在每周七天中 任选两天休息,以后不再改动,则他们选定的两个休息日相同的概率是 11. 函数()(31)2f a m a b m =-+-,当[]0,1m ∈时,0()1f a ≤≤恒成立,则222b a ab-的最大值是12. 已知两个正项数列{}n a 、{}n b ,其中{}n a 为等比数列,{}n b 为等差数列,且11a b =,1)n a n *+=∈N ,则1a =二. 选择题13. 式子:123248(2)n n n n n n C C C C -+-+⋅⋅⋅+-等于( )A. (1)n -B. (1)1n --C. 3nD. 31n - 14. 关于x 、y 的二元一次方程组1323mx y mx my m +=-⎧⎨-=+⎩的系数行列式0D =是该方程组有解的( )条件A. 充分非必要B. 必要非充分C. 充要D. 既不充分也不必要 15. 若函数()()f x x ∈R 为奇函数,且存在反函数1()f x -(与()f x 不同),11()()()()22()22f x f x f x fx F x ---=+,则下列关于函数()F x 的奇偶性的说法中正确的是( )A. ()F x 是奇函数B. ()F x 是偶函数C. ()F x 既是奇函数又是偶函数D. ()F x 是非奇非偶函数16. 设0.ab ••是一个循环节长度为两位的循环纯小数,其中a 和b 分别为10以内的非负整数,且a b ≠,0b ≠,若集合1{|0.,}A n ab n n••*==∈N ,则A 中所有元素的和为( )A. 44B. 110C. 132D. 143三. 解答题17. 已知平面向量(sin(),1)a x π=-r ,(3,cos )b x =r ,函数()f x a b =⋅r r.(1)写出函数()f x 的单调递减区间; (2)设()()16g x f x π=-+,求直线2y =与()y g x =在区间[0,]π上图像的所有交点坐标.18. 在长方体1111ABCD A B C D -中,2AB BC ==,过1A 、1C 、B 三点的平面截去长方体的一个角后,得到如图所示的几何体111ABCD AC D -,且这个几何体的体积为10. (1)求棱1A A 的长;(2)求点D 到平面11A BC 的距离.19. 某火山喷发停止后,为测量的需要,设距离喷口中心50米内的圆环面为第1区、50米至100米的圆环面为第2区、…、第50(1)n -米至50n 米的圆环面为第n 区、…,现测得第1区火山灰平均每平方米为1000千克,第2区每平方米的平均重量较第1区减少2%,第3区较第2区又减少2%,以此类推,求:(1)离火山口1225米处的圆环面平均每平方米火山灰重量(结果精确到1千克)? (2)第几区内的火山灰总重量最大?20. 已知数列{}n a 是首项1a =q =315log n n b a t +=, 常数t *∈N ,数列{}n c 满足n n n c a b =⋅. (1)求证:数列{}n b 是等差数列; (2)若{}n c 是递减数列,求t 的最小值;(3)是否存在正整数k ,使k c 、1k c +、2k c +重新排列后成等比数列?若存在,求k 的值; 若不存在,说明理由.21. 定义变换cos sin :sin cos x y x T x y y θθθθ'+=⎧⎨'-=⎩ 可把平面直角坐标系上的点(,)P x y 变换到这一平面上的点(,)P x y '''. 特别地,若曲线M 上一点P 经变换公式T 变换后得到的点P '与点P 重合,则称点P 是曲线M 在变换T 下的不动点.(1)若椭圆C 的中心为坐标原点,焦点在x 轴上,且焦距为的距离为2. 求该椭圆C 的标准方程. 并求出当3arctan 4θ=时,其两个焦点1F 、2F 经变换公式T 变换后得到的点1F '和2F '的坐标;(2)当3arctan 4θ=时,求(1)中的椭圆C 在变换T 下的所有不动点的坐标;(3)试探究:中心为坐标原点、对称轴为坐标轴的双曲线在变换cos sin :sin cos x y x T x y y θθθθ'+=⎧⎨'-=⎩(,)2k k πθ≠∈Z 下的不动点的存在情况和个数.参考答案一. 填空题1. 02. 03. 54. 45.83 6. 19247. (,1){0}(1,)-∞-+∞U U 8. 33789. [2,)+∞U 10. 144111. 158 12.二. 选择题13. B 14. D 15. A 16. D三. 解答题 17.(1)4[2,2]33k k ππππ++,k ∈Z ;(2)(,2)6π,5(,2)6π18.(1)3;(2 19.(1)616;(2)5020.(1)5d =;(2)7;(3)1k =,5t =21.(1)2213x y +=,1(F ',2F ';(2)31(,)22,31(,)22--; (3)设双曲线221x y m n +=,0mn <,① 当0m >,0n <,09mn<-<,有两个不动点,否则不存在不动点;② 当0m <,0n >,9mn->,有两个不动点,否则不存在不动点。

2019-2020学年上海市复旦附中高三上英语9月周练四

2019-2020学年上海市复旦附中高三上英语9月周练四

2019-2020 学年复旦附中高三9 月周练四Ⅱ.Section BDirections:Complete the following passage by using the words in the box.Each word can only be used once.Note that there is one word more than you need.A.fullyB.predeterminedC.schoolsD.environmental AB.exhibitAC.cooperative AD.surroundings BC.extremes BD.biologicalCD.absolutely ABC.referredPeople have wondered for a long time how their personalities and behavior are formed.It is not easy to explain why one person is intelligent and another is not,or why one is__21__and another is competitive.Social scientists are of course extremely interested in these types of questions.They want to explain why we possess certain characteristics and__22__certain behavior.There are no clear answers yet,but two distinct__23__of thought on the matter have developed.As one might expect,the two approaches are very different from each other,and there is a great deal of debate between proponents of each theory.The controversy is often conveniently__24__to as“nature and nurture”.Those who support the“nature”side of the conflict believe that our personalities and behavior patterns are largely determined by__25__and genetic factors.Taken to an extreme,this theory states that out behavior is__26__to such a great degree that we almost completely governed by our instincts(本能).Proponents of the“nurture”theory,or,as are often called,behaviorists,claim that our environment is more important than our biologically based instincts in determining how we will act.A behaviorist,B.F.Skinner,sees humans as beings whose behavior is almost completely shaped by their__27__.The behaviorists’view of the human being is quite mechanistic.They state that,like machines,humans respond to__28__stimuli(刺激)as the basis of their behavior.Neither of these theories can yet__29__explain human behavior.In fact,it is quite likely that the key to our behavior lies somewhere between these two__30__and that the controversy will continue for a long time is certain.Section ADirections:For each blank in the following passages there are four words or phrases marked A,B, C and D.Fill in each blank with the word or phrase that best fits the context.Everyone hates to wait in lines.We get that exhausting feeling that our precious life is __31__away while we’re doing something so meaningless.But it’s not always the length of the wait we find so unbearable.Our behavior when waiting is only partly defined by the length of the wait.Often the psychology of queuing is more important than the statistics of the wait itself.One apparent aspect of queuing psychology is that we get bored when we wait in line.This issue is __32__in many ways,from magazines in hospital waiting rooms to the__33__in elevators so that we can__34__our appearance.We really hate it when we expect a short wait and then get a long one.But studies show that we are much more__35__when we are given an idea of how long we’ll be waiting.Walt Disney Co.knows this better than anyone else.It posts estimated waiting times for__36__in its theme parks.But according to Larson,these times are__37__so that visitors get to the front of the queue more quickly than they expect.It keeps them happy.But perhaps the biggest influence on our feelings about waiting in line has to do with our understanding of fairness.When it comes to queues,the universally acknowledged standard is first come,first__38__.Any deviation(偏差)from this__39__is regarded as unfair and can lead to violent queue rage.Sometimes,however,we are willing to make__40__.For example,we are fine with the __41__given to those with a more critical condition in hospital.But in most situations,we demand fairness.You’ve probably experienced__42__queue yourself in fast food restaurants, watching people in the other line move ahead of you,__43__yourself for having chosen the “wrong”line.In order to solve this problem,the winding line was invented.Slate magazine’s website explains:“The winding line groups all customers into one big snaking queue,separated by ropes or barriers.When you reach the head of the queue,you are directed to the next__44__server,or teller,or customs official,which offers important comfort:you__45__never have to see someone arrive after you and get served before you.”help make it aa bit more bearable.When all else fails,bring a book or smart-phone will also do.31.A.floating B.slipping C.sliding D.fleeing32.A.produced B.resolved C.tackled D.dissolved33.A.mirrors B.newspapers C.clocks D.beverage34.A.check B.supervise C.criticize D.neglect35.A.frustrated B.refreshed C.patient D.desperate36.A.queues B.restaurants C.visitors D.attractions37.A.overlooked B.oversized C.underestimated D.overestimated38.A.served B.leave C.gone D.done39.A.theory B.concept C.principle D.discipline40.A.differences B.exceptions C.principle D.discipline41.A.power B.priority C.justice D.chanced B.strong C.severe D.intense43.A.reflecting plimenting ughing D.blaming44.A.available B.approachable C.acceptable D.approvable45.A.possible B.absolutely C.actually D.reallySection BDirections:Read the following passages.Each passage is followed by several questions or unfinished statements.For each of them there are four choices marked A,B,C and D.Choose the one that fits best according to the information given in the passage you have just read.(A)The Indian cliff dwellings(崖居)of the southwestern United States are a source of interest and mystery for archeologist.Located in the Four Corners area of the U.S.,where Colorado, Utah,Arizona and New Mexico,the cliff dwellings were constructed during the Great Pueblo period,from approximately1050to1300.The cliff dwellings are whole series of rooms built in layers into the sides of cliffs.The sleeping rooms of the cliff dwellings were very tiny,often only one to two meters wide and little more than one meter high,and they were built in complexes of up to several hundred rooms together.The front rooms of the complexes were considerably larger.When the cliff swellings were first found by explorers,they had been abandoned. Archeologists today are uncertain as to when or why they were abandoned and where the inhabitants went.There is some evidence,however,that the inhabitant left the cliff dwellings near the end of the thirteenth century because of a serious drought that is know to have occurred in the area from1276to1299.Archeologists believe that the inhabitants could have left the cliff dwelling to move southwest and southeast.Today the descendants of the cliff dwellers are probably members of the Indian tribes of that area.46.When the cliff dwellings were found,they were_______.A.popular with touristsB.full of daily lifeC.deserted and lifelessD.in a state of drought47.Why did the Four Corners area receive its name?A.The cliff dwellings in the area each have four cornersC.The Great Pueblos are four-corneredD.The corners of four states meet there48.The archeologists are certain about_______.A.the reason why the cliff dwellers abandoned their homesB.that a drought occurred in the Four Corners area from1276to1299C.the place the inhabitants of the cliff dwelling went toD.the time when the cliff dwellers abandoned their homes.49.Which of the following is NOT discussed in the passage?A.The lifestyle of the cliff dwellersB.The size of the cliff dwellingsC.The mystery concerning the abandonment of the cliff dwellingsD.The location of the cliff dwellings(B)Below is a selection from a popular science book.If blood is red,why are veins blue?Actually,veins are not blue at all.They are more of a clear,yellowish color.Althoughit’s more of a dark reddish purple colour.At the right depth,these blood-filled veins reflect less read light than the surrounding skin,making them look blue by comparison.Which works harder,your heart or your brain?That kind of depends on whether you’re busy thinking or busy exercising.your heart works up to three times harder during exercise,and shifts enough blood over a lifetime to fill a supertanker.But in the long run,your brain probably tips it,because even when you’re sitting still your brain is using twice as much energy as your heart,and it takes four to five times as much blood to feed it.Why do teeth fall out,and why don’t they grow back in grown-ups?Baby(or“milk”)teeth do not last long;they fall out to make room bigger,stronger adult teeth later on.Adult teeth fall out when they become damaged,decayed and infected by bacteria. Once this second set of teeth has grown in,you’re done.When they’re gone,they’re gone.This is because nature figures you’re set for life,and what controls regrowth of your teeth switches off. Do old people shrink as they age?Yes and no.Many people do get shorter as they age.But,when they do,it isn’t because they’re shrinking all over.They simple lose height as their spine becomes shorter and more curved due to disuse and the effects of gravity.Many(but not all)men and women do lose height as they get older.Men lose an average of3~4cm in height till you were,like60cm tall,like a little boy again?No,because old people don’t really shrink!It is not that they are growing backwards-their legs,arms and backbones getting shorter.When they do get shorter,it’s because the spine has shortened a little.Or,more often,become more bent and curved.Why does spinning make you dizzy?Because your brain gets confused between what you’re seeing and what you’re feeling. The brain senses that you’re spinning using special gravity-and-motion-sensing organs in your inner ear,which work together with your eyes to keep your vision and balance stable.But,when you suddenly stop spinning the system goes out of control and your brain thinks you’re moving while you’re not!Where do feelings and emotions come from?Mostly from an ancient part of the brain called the limbic system.All mammals have thispain and pleasure.But since human feeling also involve other,newer bits of the brain,we feel more complex emotions than any other mammals on the planet.If exercise wears you out,how can it be good for you?Because our bodies adapt to everything we do to them.And as far as your body is concerned,it’s“use it,lose it!”It’s not that exercise makes you healthy;it’s more that a lack of exercise leaves your body weak and easily affected by disease.50.What is the color of blood in a vein near the surface of the skin?A.BlueB.light yellowC.RedD.Dark reddish purple51.Why do some old people look a little shrunken as they age?A.Because their spine is in active useB.Because they are more easily affected by gravityC.Because they keep growing backwardsD.Because their spine becomes more bent52.Which of the following statements about our brain is true?A.In the long run,our brain probably works harder than our heart.B.When our brain senses the spinning,we will feel dizzyC.The brains of the other mammals are as complex as those of humansD.Our feelings and emotion come from the most developed area in our brain53.What is the main purpose of the selection?A.To give advice on how to stay healthyB.To provide information about our bodyC.To challenge new finding in medical researchD.To report that latest discoveries in medical science(C)Increasingly,over the past few decades,people especially young people,have become aware of the need to change their eating habits,because much of the food they eat,particularly processed food,is not good for health.Consequently,there has been a growing interest in natural foods.Foods which do not contain chemical additives and which have not been affected byNatural foods,for example,are vegetables,fruit and grain which have been grown in soil that is rich in organic matter.In simple terms,this means that the soil has been nourished by unused vegetable matter,which provides it with essential vitamins and minerals.This in itself is a natural process compared with the use of chemicals and fertilizers,the main purpose of which is to increase the amount--but not the quality--of foods grown in commercial farming areas.Natural foods also include animals which have been allowed to feed and move freely in healthy pastures(牧场).Compare this with what happens in the mass production of poultry:there are battery farms,for example,where thousands of chickens live crowded together in one building tasteless as food,they also lay eggs which lack important vitamins.There are other aspects of healthy eating which are now receiving increasing attention from experts on diet.Take,for example,the question of sugar.This is actually a non-essential food! Although a natural alternative,such as honey,can be used to sweeten food if it is necessary,we can in fact do without it.It is not that sugar is harmful in itself.But it does seem to be addictive: the quantity we use has grown steadily over the last two centuries and in Britain today each person consumes an average of200pounds a year!Yet all it does is to provide us with energy,in the form. of calories.There are no vitamins in it,no minerals and no fiber.It is significant that nowadays fiber is considered to be an important part of a healthy diet. In white bread,for example,the fiber has been removed.But it is present in unrefined flour and of course in vegetables.It is interesting to note that in countries where the national diet contains large quantifies of unrefined flour and vegetables,certain diseases are comparatively rare.Hence the emphasis is placed on the eating of wholemeal bread and more vegetables by modern experts on “healthy eating”.54.People have become more interested in natural foods because_______.A.they are more health consciousB.they want to taste all kinds of foodsC.natural foods are more delicious than processed foodsD.they want to return to nature55.Soil that is rich in organic matter_______.A.has band chemicals and fertilizer added to itC.has been nourished by fertilizerD.already contains large quantities of vitamins and minerals.56.According to the passage._______。

复旦附中高三练习04(2019.09)

复旦附中高三练习04(2019.09)

复旦附中高三数学综合练习042019.09一. 填空题1. 已知不等式2202x xx a+≤+的解集为A ,且2A ∈,3A ∉,则实数a 的取值范围是2. 在平面直角坐标系中,角α的顶点在原点,始边在x 轴的正半轴上,角α的终边经过点(cos ,sin )88M ππ-,且02απ<<,则α=3. 在1020191(2)x的展开式中,4x 项的系数为 (结果用数值表示)4. 在△ABC 中,角A 、B 、C 的对边分别为a 、b 、c ,若222()tan a c b B +-=, 则角B 的值为5. 已知0x >,0y >,且211x y+=,则2x y +的最小值是 6. 已知函数()()||f x x a x =-存在反函数,则实数a =7. 设2{|40}A x x x =+=,22{|2(1)10}B x x a x a =+++-=,若A B B =I ,则a 的取值 范围是8. 将圆锥的侧面展开后得到一个半径为2的半圆,则此圆锥的体积为9. 已知集合0{|01}A x x =<<,对于函数()y f x =,定义1{|(),}n n A y y f x x A -==∈,其 中*n ∈N ,若1n n A A -=∅I 对任意的*n ∈N 成立,则称()y f x =具有性质“ϕ”,给出下 列函数:①1y x =;②21y x =+;③2cos()2y x π=+;其中具有性质“ϕ”的函数的序号 是 (写出所有正确答案的序号)10. 关于x 的方程1936(5)0x x k k k +⋅-⋅+-=在[0,2]上有解,则k 的取值范围为11. 已知函数21()||2f x x mx =++(x ∈R ),且()f x 在[0,2]x ∈上的最大值为12,若函 数2()()g x f x ax =-有四个不同的零点,则实数a 的取值范围为12. 设集合122020{(,,,)|{0,1},1,2,,2020}i x x x x i Ω=⋅⋅⋅∈=⋅⋅⋅,对于Ω中的任意两个元素122020(,,,)x x x α=⋅⋅⋅,122020(,,,)y y y β=⋅⋅⋅,记11112222()()x y x y x y x y αβ*=+-++-+⋅⋅⋅2020202020202020()x y x y ++-,设,u v ∈Ω,若2020u u v v *+*=,则u v *的最小值是二. 选择题13. 将序号分别为1,2,3,4,5的五张参观券全部分给甲、乙、丙、丁四人,每人至少1张,如果分给甲的两张参观券是连号,那么不同分法的种数是( ) A. 6 B. 24 C. 60 D. 12014. 已知△ABC 内接于单位圆,则长为sin A 、sin B 、sin C 的三条线段( ) A. 能构成一个三角形,其面积大于△ABC 面积的一半 B. 能构成一个三角形,其面积等于△ABC 面积的一半 C. 能构成一个三角形,其面积小于△ABC 面积的一半 D. 不一定能构成一个三角形15. 有一塔形几何体由若干个正方体构成,构成方式如图所示,上 层正方体下底面的四个顶点是下层正方体上底面各边的中点,已知 最底层正方体的棱长为2,且该塔形的表面积(含最底层正方体的 底面面积)超过39,则该塔形中正方体的个数至少是( ) A. 4 B. 5 C. 6 D. 716. 设函数321()21x x f x x -=++,若对任意实数(1,1)a ∈-,(1,1)b ∈-,则0a b +≥是()()0f a f b +≥的( )A. 充分不必要条件B. 必要不充分条件C. 充要条件 /D. 既不充分也不必要条件三. 解答题17. 设(,)(1)xm f x y y=+(0m >,0y >). (1)若31240234(4,)a a a a f y a y y y y =++++,且332a =,求m 的值;(2)当3m =时,求(100,)f y 的展开式中二项式系数最大的项和系数最大的项.18. 如图,在正四棱锥P ABCD -中,PA AB =,E 、F 分别为PB 、PD 的中点. (1)求异面直线PC 与AE 所成角的余弦值; (2)若平面AEF 与棱PC 交于点M ,求PMPC的值.19. 如图,某公园内有两条道路AB 、AP ,现计划在AP 上选择一点C ,新建道路BC , 并把△ABC 所在的区域改造成绿化区域,已知6BAC π∠=,2AB km =.(1)若绿化区域△ABC 的面积为12km ,求道路BC 的长度;(2)若绿化区域△ABC 改造成本为10万元/2km ,新建道路BC 成本为10万元/km , 设ABC θ∠=(233ππθ≤≤),当θ为何值时,该计划所需总费用最小?20. 已知函数2()log ()f x x a =+.(1)若10(12)()2f x f x <--<,当1a =时,求x 的取值范围; (2)若定义在R 上奇函数()g x 满足(2)()g x g x +=-,且当01x ≤≤时,()()g x f x =,求()g x 在[3,1]--上的反函数()h x ;(3)对于(2)中定义在R 上的()g x ,若关于x 的不等式232()1log 382xx t g +-≥-+在R 上 恒成立,求实数t 的取值范围.21. 已知函数()f x 的定义域为[,]a b ,定义:1()min{()|}f x f t a t x =≤≤([,]x a b ∈), 2()max{()|}f x f t a t x =≤≤([,]x a b ∈),其中,min{()|}f x x D ∈表示函数()f x 在D 上 的最小值,max{()|}f x x D ∈表示函数()f x 在D 上的最大值. (1)若()cos f x x =,[0,]x π∈,写出1()f x ,2()f x 的表达式;(2)设0c >,1c ≠,函数2()(3)1x x f x c c c =+--,1[,1]2x ∈,若2()f x 与()f x 是同一 函数,求c 的取值范围;(3)若存在最小正整数k ,使得21()()()f x f x k x a -≤-对任意[,]x a b ∈都成立,则称函数()f x 为[,]a b 上的“k 阶收缩函数”,已知函数2()f x x =,[1,4]x ∈-,试判断()f x 是否为[1,4]-上的“k 阶收缩函数”,如果是,求k 的值,如果不是,请说明理由.参考答案一. 填空题1. 3[,1)2--2.78π 3. 180 4. 3π或23π5. 96. 07. (,1]{1}-∞-U8.9. ①② 10. 1[,8]211. (0,1) 12. 1010二. 选择题13. B 14. C 15. C 16. C三. 解答题17.(1)2;(2)5050511003()T C y =,7575761003()T C y=18.(1;(2)1319.(12)3π20.(1)133x -<<;(2)23,10()21,01x x x h x x ---≤≤⎧⎪=⎨--<≤⎪⎩;(3)[4,20]-21.(1)1()cos f x x =,[0,]x π∈;2()1f x =,[0,]x π∈;(2)(1,9];(3)4k =。

上海市复旦大学附属中学青浦分校2019-2020学年高三下学期数学开学摸底考试卷( word版含答案)

上海市复旦大学附属中学青浦分校2019-2020学年高三下学期数学开学摸底考试卷( word版含答案)

复旦附中青浦分校2019学年第二学期高三年级开学摸底考数学试卷一.填空题(本大题共有12题,满分54分,第1~6题每题4分,第7~12题每题5分)1.抛物线214y x=-的准线方程是_____2. 若行列式12812x-=,则x=____3.函数()2sin1,,2f x x xππ⎡⎤=+∈⎢⎥⎣⎦的反函数1()f x-=____.4.“病毒无情人有情”.青浦某党支部要从2名女党员和4名男党员中选出4人担任某社区抗击新冠病毒疫情的志愿者工作,则在选出的志愿者中,男、女都有的概率为____. (结果用数值表示)5. 无穷等比数列{}n a的前n项和为,n S11limn a→∞=,则首项1a的取值范围是___.6.如图,已知扇形的圆心角为60°,半径为1,则扇形的内接矩形面积的最大值为___.7.设实数x、y满足约束条件360200,0x yx yx y--≤⎧⎪-+≥⎨⎪≥≥⎩,若目标函数z=ax+by(a> 0,b>0)的最大值为2,则2a + 3b的值为___.25218.(2)(1)xx+-的展开式中常数项为____.9.已知数列{},{}n na b满足*1121,1,()21nn n nnba ab b n Na+=+==∈-则2020b=___.10.在在平面直角坐标系中,O为坐标原点,M、N是椭圆22124x y+=上的两个动点,动点P满足2,OP OM ON=-u u u r u u u u r u u u r直线OM与直线ON斜率之积为-2,已知平面内存在两定点12,F F、使得12||||PF PF+为定值,则该定值为_____.11.已知向量,a brr满足||1,||2a b==rr,则||||a b a b++-r r rr的取值范围是___.12. 已知二元函数222222(,)()()(0)f x y x y x y a x a y a=++--+>26,则正实数a 的值为_____.二.选择题(本大题共有4题,满分20分,每题5分)13.对任意向量,a b ⋅r r 下列关系式中不恒成立的是( ).||||||A a b a b ⋅≤r r r r.||||||||B a b a b -≤-r r r r 22.()||C a b a b +=+r r r r 22.()()D a b a b a b +-=-r r r r r r14.一个学生期末数学的平时成绩为B 的标准为“平时的五次成绩均不小于80分”.根据甲、乙、丙、丁四位同学五次平时成绩的记录数据(记录数据都是正整数),平时成绩一定为B 的是( )A.甲同学:中位数为85,总体均值为82B.乙同学:众数为83,总体均值为82C.丙同学:总体均值为84,总体方差为6D.丁同学:中位数为83,总体方差为615.曲线C 是平面内与两个定点1(1,0)F -和2(1,0)F 的距离的积等于常数2(1)a a >的点的轨迹,给出下列三个结论:①曲线C 过坐标原点;②曲线C 关于坐标原点对称;③若点P 在曲线C 上,则22F PF V 的面积不大于21,2a 其中,所有正确结论的序号是( C )A.①②B.①③C.②③D.①②③ 16.设等差数列*12,,,(3,)n a a n a n ≥∈L N 的公差为d,满足121212|||||||1||1||1||2||2||2|n n n a a a a a a a a a m +++=-+-+-=++++++=L L L ,则下列说法正确的是(A)A. |d|≥3B. n 的值可能为奇数C.存在i ∈N *,满足21i a -<<D. m 的可能取值为11 三.解答题(本大题满分76分)本大题共有5题,解答下列各题必须在答题纸相应编号的规定区域内写出必要的步骤.17. (本题满分14分)本题共有2个小题,第1小题满分6分,第2小题满分8分.如图,已知多面体111111,,,ABC A B C A A B B C C -均垂直于平面ABC,∠ABC= 120°,1114,1, 2.A A C C AB BC B B =====(1)证明:1AB ⊥平面111A B C ;(2)求直线1AC 与平面1ABB 所成的角的正弦值.18. (本题满分14分)本题共有2个小题,第1小题满分6分,第2小题满分8分.己知向量2,2),(cos ,cos ),222x x x m n ==u r r 函数().f x m n =⋅r r (1)求方程f(x)=0在区间[- 2π,2π]的解集;(2)在△ABC 中,角A 、B 、C 的对边分别是a 、b 、c,且满足(2a- c)cos B = bcosC,求f(A)的取值范围.19. (本题满分14分)本题共有2个小题,第1小题满分6分,第2小题满分8分.我们称点p 到图形C 上任意一点距离的最小值为点P 到图形C 的距离,记作d(P, C).(1)求点P(3,0)到抛物线C 2:4y x =的距离d(P, C);(2)设l 是长为2的线段,求点集D={P|d(P, l)≤ 1}所表示图形的面积.20.(本题满分16分)本题共有3个小题,第1小题满分4分,第2小题满分6分,第三小题满分6分. 设a 为实数,函数2()||1()f x x x a a =+-+∈R(1)若函数y= f(x)是偶函数,求实数a 的值;(2)若a= 2 ,求f(x)的最小值;(3)对于函数y= m(x)和给定区间[a,b] ,若存在00(),x a x b <<满足0()()(),m b m a m x b a-=-则称函数m(x)是区间[ a,b]上的"平均值函数",0x 是它的一个"均值点",如函数2y x =是[-1,1]上的平均值函数, 0就是它的均值点,现有函数2()1g x x mx =-++是区间[ -1,1]上的平均值函数,求实数m 的取值范围.21.(本题满分18分)本题共有3个小题,第1小题满分4分,第2小题满分6分,第3小题满分8分. 已知数列{}n a 是无穷数列,满足11lg |lg lg |(2,3,4,n n n a a a n +-=-=...) .(1)若122,3,a a ==求345,,a a a 的值;(2)求证:“数列{}n a 中存在*()k a k ∈N 使得lg 0k a =”是“数列{}n a 中有无数多项是1”的充要条件;(3)求证:存在正整数k,使得1 2.k a ≤<。

上海市复旦大学附属中学2019-2020学年高三下学期数综合周练

上海市复旦大学附属中学2019-2020学年高三下学期数综合周练

复旦附中高三数学综合练习452020.03一.选择题1.曲线的参数方程为22321x t y t ⎧=+⎪⎨⎪=-⎩,其中0≤t≤5,则曲线是()A.线段B.双曲线的一支C.圆弧D.射线2.若a 、b 表示两条直线,α表示平面,下列说法中正确的为()A.若a ⊥α,a ⊥b,则b ∥αB.若a ∥α,a ⊥b,则b ⊥αC.若a ⊥α,b ⊂α,则a ⊥bD.若a ∥α,b ∥α,则a ∥b3.若函数y=f(x),x ∈R 为非奇非偶函数,则有()A.对于任意的x 0∈R ,都有f(-x 0)≠f(x 0)且f(-x 0)≠-f(x 0)B.存在x 0∈R ,使f(-x 0)≠f(x 0)且f(-x 0)≠-f(x 0)C.存在x 1,x 2∈R ,使f(-x 1)≠f(x 1)且f(-x 2)≠-f(x 2)D.对于任意的x 0∈R ,都有f(-x 0)≠f(x 0)或f(-x 0)≠-f(x 0)4.已知数列{a n }与{b n }前n 项和分别为S n 、T n ,且a n >0,2S,=a 2+a n ,n ∈N *,1121(2)2)(n n n n n n b a a +++=++,对任意的n ∈N *,k>T n 恒成立,则k 的最小值是( )A.1B. 12C. 13D. 16二.解答题5.(1)不等式13x <的解集为___ (2)已知向量(3,1,5)a =-r ,(1,2,1)b =-r ,则||()a tb t +∈r r R 的最小值为___ (3)函数y=2x(x≥2)的反函数是___ (4)022222lim 34n n n n n n C C C →∞+++=-L _____ (5)某线性方程组对应的增广矩阵是421m m m ⎛⎫ ⎪⎝⎭,且此方程组无解,则实数m=____ (6)若双曲线223x y m m -=1的焦点在y 轴上,焦距为8,则实数m=___。

江苏省扬州大学附属中学高三数学周练(1)

江苏省扬州大学附属中学高三数学周练(1)

江苏省扬州大学隶属中学2019 届高三数学周练 (1)一 、填空题(本大题共有14 小题,每题 5 分,共 70 分)1、命题 “x R, x 2 x 0 ”的否命题是命题 .(填 “真”或 “假”)2、设会合 P { 1,2,3,4}, Q { x | 2 x 2, x R} ,则 P Q.3、若复数 zai( a R, i 为虚数单位) 的实部与虚部相等,则 z的模等于.2i2x y 24、若实数 x, y 知足拘束条件 x y1 ,则目标函数 z 2x y 的最小值为 .x y 15、已知 x 0, y 0, lg 2x lg 8ylg 2 ,则11 的最小值为.x3y6、设向量 a ( 2,1), b (1,2) ,若 (2a b) ∥ (1a kb) ,则实数 k 的值为.27 、将函数 f ( x)sin(2x) 的图象向右平移 个单位,所得图象的分析式66为.8、已知 a51,函数 f ( x) a x ,若实数 m 、 n 知足 f (m) f (n) ,则 m 、 n 的大小关2系为.9 、设曲线 f ( x) e x 1 与 y 轴订交于点P ,则 f ( x) 图象在点 P 处的切线方程为.10、若 sin3sin(2) ,则 2 tan() tan.11、若不等式 (m 2 1) x 2 2(m 1)x 3 0 对一确实数 x 恒建立,则实数 m 的取值范围为.12、已知函数f ( x)的导函数为f'( x)ax(x 2)( x a)(a 0) ,若函数 f ( x) 在x 2 处取到极小值,则实数 a 的取值范围为.13、若点 G 为△ABC 的重心,且 AG⊥BG,AB = 2,则CA CB的值为.14、已知x, y, z(0, ) 且 x2y 2z21,则 3xy yz 的最大值为.二、解答题(本大题共有 6 小题,共 90 分. 解答应写出文字说明,证明过程或演算步骤 .)15、已知函数 f (x)cos2 ( x) 3(0,0) 的最大值为2,最小正周期为2.63(1)求函数y f ( x) 的分析式;(2)当x[0, ] 时,求函数 f (x) 的值域.216、如下图,矩形 ABCD 的极点 A,D 分别在x轴,y轴正半轴(含坐标原点)滑动,此中 AD = 4,AB = 2.(1)若DAO,求OC OD ;4(2)求OB OC的最大值 .117、已知△ABC 的内角 A ,B,C 所对的边分别为a,b, c,sin B sin CR(此中 R 为△ABC 外接圆的半径)且△ABC 的面积S a2(b c)2.(1)求tan A的值;(2)求△ABC 的面积 S 的最大值 .18、某参观区的平面表示图如下图,此中矩形 ABCD 的长 AB = 2 千米,宽 AD = 1千米,半圆的圆心 P 为 AB 中点,为了便于旅客参观休闲,在参观区铺设一条由圆弧 AE 、线段 EF 、FC 构成的参观道路,此中线段EF 经过圆心 P ,且点 F 在线段 CD 上(不含线段端点 C ,D ),已知道路 AE ,FC 的造价为 2a(a0) 元每千米,道路 EF 造价为 7a 元每千米,设APE,参观道路的总造价为 y .( 1)试求 y 与 的函数关系式 : y f ( ) ;( 2)当 为什么值时,参观道路的总造价 y 最小 .b19、已知函数 f (x)bx2a ln x .x(1)若 a 1 时,函数 f (x) 在其定义域上不是单一函数,务实数b 的取值范围;(2)若 b 1时,且当 x 1 , x 2 (0, ) 时,不等式 [f ( x 1)f (x 2 )]( x 1 x 2 ) 0 恒建立,求 ax 2x 1的取值范围 .20、设函数 f ( x) ln x ax 2 (a0) .(1)议论函数 f ( x) 零点的个数;(2)若函数 f (x) 有极大值为1,且存在实数 m, n(mn) 使得 f (m)f (n) ,试比较2m n 与 4a 的大小,并证明 .。

上海市复兴中学2019-2020年高三第一学期9月周练02

上海市复兴中学2019-2020年高三第一学期9月周练02

2019-2020年复兴高中高三上周练02一. 填空题1. 函数y 的定义域是2. 若22sin cos cos 0ααα-=,则cot α=3. 已知圆心角为23π的扇形周长为4,则扇形的面积为 4. 若角α的终边与单位圆交于第二象限的点3(cos ,)5A α,则cos sin αα-= 5. 若角α的终边上的一点坐标是(sin 4,cos4)-,则α=6. 设α是第三象限角,且5sin()cos sin cos()13αβββαβ+-+=-,则cos2α= 7. 方程1313313x x -+=-的实数解为 8. 若不等式222log x x <在区间1(0,)2上恒成立,则实数a 的取值范围为 9. 函数22(1)sin ()1x x f x x ++=+,max ()f x M =,min ()f x m =,则M m += 10. 已知函数4()1f x x x =+-,若存在实数121,,,[,4]4n x x x ⋅⋅⋅∈,使得121()()()()n n f x f x f x f x -++⋅⋅⋅+=,则正整数n 的最大值为11. 若函数2()|sin |3sin f x x t x =+++(,x t ∈R )的最大值记为()g t ,则函数()g t 的最小值为12. 问题“求不等式345x x x +<的解”有如下思路:原不等式可变为34()()155x x +<,考虑 函数34()()()55x x f x =+,可知(2)1f =,且函数在R 上单调递减,故原不等式的解集是 (2,)+∞,仿照此解法可得到不等式632(23)(23)x x x x -+>+-的解集是二. 选择题13. 已知命题甲是“2{|0}1x x x x +≥-”,命题乙是“3{|log (21)0}x x +≤”,则( ) A. 甲是乙的充分条件但不是必要条件B. 甲是乙的必要条件但不是充分条件C. 甲是乙的充要条件D. 甲既不是乙的充分条件也不是乙的必要条件14. 已知tan tan tan()αβαβ⋅=+,有下列两个结论:① 存在α在第一象限,β在第三象限;② 存在α在第二象限,β在第四象限;则( )A. ①②均正确B. ①②均错误C. ①对②错D. ①错②对15. 已知△ABC 内接于单位圆,则长为sin A 、sin B 、sin C 的三条线段( )A. 能构成一个三角形,其面积大于△ABC 面积的一半B. 能构成一个三角形,其面积等于△ABC 面积的一半C. 能构成一个三角形,其面积小于△ABC 面积的一半D. 不一定能构成三角形16. 已知函数2()f x x =,[1,2]x ∈的反函数为1()f x -,则函数121[()](2)y f x f x --=+的值域是( )A. 1[,4]2-B. [1,4]C. [1+D. [1+三. 解答题17. 在直三棱柱111ABC A B C -中,90ABC ∠=︒,1AB BC ==,12BB =.(1)求异面直线11B C 与1A C 所成角的大小;(2)求点1B 与平面1A BC 的距离.18. 已知函数1()ln 1x f x x+=-的定义域为A ,集合(,1)B a a =+,且B A ⊆. (1)求实数a 的取值范围;(2)求证:函数()f x 是奇函数但不是偶函数.19. 在△ABC 中,内角A 、B 、C 所对的边长分别是a 、b 、c .(1)若2c =,3C π=,且△ABC a 、b 的值; (2)若sin sin()sin2C B A A +-=,试判断△ABC 的形状.20.(1)已知αtan ,βtan 是关于x 的一元二次方程022=++px x (p 为常数)的两实根,求)cos()sin(βαβα-+值; (2)已知(0,)θπ∈,且sin θ、cos θ是关于x 的一元二次方程250x x m -+=(m ∈R )的两根,求33sin cos θθ+的值.21.已知函数()y f x =,x D ∈,如果对于定义域D 内的任意实数x ,对于给定的非零常数m ,总存在非零常数T ,恒有()()f x T mf x +>成立,则称函数()f x 是D 上的m 级类增周期函数,周期为T ,若恒有()()f x T mf x +=成立,则称函数()f x 是D 上的m 级类周期函数,周期为T .(1)已知函数2()f x x ax =-+是[3,)+∞上的周期为1的2级类增周期函数,求实数a 的取值范围;(2)已知1T =,()y f x =是[0,)+∞上m 级类周期函数,且()y f x =是[0,)+∞上的单调递增函数,当[0,1)x ∈时,()2x f x =,求实数m 的取值范围;(3)是否存在实数k ,使函数()cos f x kx =是R 上的周期为T 的T 级类周期函数,若存在,求出实数k 和T 的值,若不存在,说明理由.参考答案一. 填空题1. [1,2)2. 23. 212(3)ππ+4. 75-5. 422k ππ-+,k ∈Z 6. 119169 7. 3log 4x = 8. 1[,1)49. 2 10. 6 11.3412. (,1)(3,)-∞-+∞U二. 选择题 13. B 14. D 15. C 16. C三. 解答题17.(1)(218.(1)10a -≤≤;(2)证明略.19.(1)2a =,2b =;(2)等腰三角形.20.(1)3p -(p <-或p >;(2)37125. 21.(1)1a <;(2)2m ≥;(3)当1T =时,2k n π=,n ∈Z ;当1T =-时,(21)k n π=+,n ∈Z .。

2019北京清华大学附属中学高三第二次模拟考试

2019北京清华大学附属中学高三第二次模拟考试

2019北京清华大学附属中学高三第二次模拟考试英语2019. 04 本试卷满分共120分考试时间100分钟出卷人:高三英语备课组全体注意事项:1. 答题前,考生务必先将答题卡上的学校、年级、班级、姓名、准考证号用黑色字迹签字笔填写清楚,并认真核对条形码上的准考证号、姓名,在答题卡的“条形码粘贴区”贴好条形码。

2. 本次考试所有答题均在答题卡上完成。

选择题必须使用2B铅笔以正确填涂方式将各小题对应选项涂黑,如需改动,用橡皮擦除干净后再选涂其它选项。

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笔试(共三部分120分)第一部分知识运用(共两节45分)第一节语法填空(共10小题;每小题1.5分,共15分)阅读下列短文,根据短文内容填空。

在未给提示词的空白处仅填写 1个适当的单词,在给出提示词的空白处用括号内所给词的正确形式填空。

AMy interest in Chinese food started years ago, when I was a young reporter for Washington Post. Our office wasn't far from Chinatown, 1 I found some very good Chinese restaurants.That was the first time that I 2 ( notice) the fresh taste of the meat and vegetables of Chinese food.When I learned more about the food, I began to understand why 3 has this special feature.BMany years ago, China had 4 energy crisis because it lost much of its wood due to over population and poor management of its forests. This 5 ( lose) was very bad for the country, of course, but it turned out to be very good for the food. Wood became very expensive and hard to get, so the Chinese had to either find a substitute for their 6 (value) wood, or learn how to use it better. There weren't any substitutes so people found ways to economize.CIn order to economize in cooking, they had to use very little wood. So they started cuttingtheir meat and vegetables 7 small pieces before they put them in the hot oil. That way, thefood cooked 8 (fast) and they saved more fuel. The food 9 (prepare) in this way kept its fresh flavour—and it's this flavour 10 attracts people from other countries to the art of Chinese cooking.第二节完形填空(共20小题;每小题1.5分,共30分)阅读下面短文,掌握其大意,从每题所给的A、B、C、D四个选项中,选出最佳选项,并在答题卡上将该项涂黑。

复兴高中高三周练01(2019.09)

复兴高中高三周练01(2019.09)

复兴高中高三数学周练012019.09一. 填空题1. 函数(1)y f x =-的图像可由函数()y f x =-的图像向 平移1个单位得到2. 幂函数)(x f y =的图像经过点1(2,)4,则=)(x f3. 函数lg y x =(1110x <≤)的值域为 4. 已知函数212()lg 2x x f x x x ⎧+<=⎨≥⎩,则((0))(5)f f f += 5. 若函数1()2ax f x x +=+(a 为常数),在(2,2)-内为增函数,则实数a 的取值范围为6. 函数y =0x ≤)的反函数为7. 已知集合2{|46,}A y y x x x ==-+∈N ,集合2{|218,}B y y x x x ==--+∈N ,则A B =I8. 若函数||2)(a x x f -=(a ∈R )满足(1)(1)f x f x +=-,且()f x 在[,)m +∞上单调递增, 则实数m 的最小值等于9. 已知函数14()2xx f x x -=-,则关于x 的不等式2(1)(57)0f x f x -+-<的解集为 10. 设集合12345{(,,,,)|{1,0,1},1,2,3,4,5}i A x x x x x x i =∈-=,那么集合A 中满足条件“123451||||||||||3x x x x x ≤++++≤”的元素个数为11. 对于函数()f x =b ,使得()f x =相同,则非零实数a 的值为12. 在平面直角坐标系xOy 中,点M 在直线y x =上,点P 在函数1y x=(0x >)的图像 上,直线y x =与函数1y x =(0x >)的图像交于点Q ,若对于函数1y x =(0x >)的图 像上的任意一点P ,||||MP MQ ≥恒成立,则点M 横坐标的取值范围是二. 选择题13. 已知a 是实数,那么“11a<”是“1a >”的( ) A. 充分非必要条件 B. 必要非充分条件C. 充要条件D. 既非充分又非必要条件14. 若,a b ∈R ,且0ab >,则下列不等式中,恒成立的是( )A. 222a b ab +>B. a b +≥C. 11a b +> D. 2b a a b +≥ 15. 如果函数()y f x =在区间I 上是增函数,而函数()f x y x=在区间I 上是减函数,那么称函数()y f x =是区间I 上的“缓增函数”,区间I 叫做“缓增区间”,若函数213()22f x x x =-+是区间I 上的“缓增函数”,则“缓增区间”I 为( )A. [1,)+∞B.C. [0,1]D. [116. 已知函数20()ln 0x e x f x x x ⎧-≤=⎨>⎩,则下列关于函数[()1]1y f f kx =++(0k ≠)的零点个数的判断正确的是( )A. 当0k >时,有3个零点;当0k <时,有4个零点B. 当0k >时,有4个零点;当0k <时,有3个零点C. 无论k 为何非零值,均有3个零点D. 无论k 为何非零值,均有4个零点三. 解答题17. 记函数()f x =A ,不等式(2)(1)0(0,)x b ax b a -+>>∈R 的 解集为B .(1)求A ;(2)若A B ⊆,求a 、b 的取值范围.18. 已知a ∈R ,函数21()log ()f x a x=+.(1)当5a =时,解不等式0)(<x f ; (2)若关于x 的方程2()log [(4)25]0f x a x a --+-=的解集中恰好有一个元素,求a 的取值范围.19. 某种出口产品的关税税率t 、市场价格x (单位:千元)与市场供应量p (单位:万件) 之间近似满足关系式:2(1)()2kt x b p --=,其中k 、b 均为常数,当关税税率为75%时,若市 场价格为5千元,则市场供应量约为1万件,若市场价格为7千元,则市场供应量为2万件.(1)试确定k 、b 的值;(2)市场需求量q (单位:万件)与市场价格x 近似满足关系式2x q -=,p q =时,市场 价格称为市场平衡价格,当市场平衡价格不超过4千元时,试确定关税税率的最大值.20. 已知()||f x x x a b =-+,a ∈R .(1)当1a =,0b =时,判断()f x 的奇偶性,并说明理由;(2)当1a =,1b =时,若5(2)4x f =,求x 的值; (3)若0b <,且对任意[0,1]x ∈不等式()0f x <恒成立,求实数a 的取值范围.21. 设函数()f x 和()g x 都是定义在集合M 上的函数,若对于任意的x M ∈,都有(())(())f g x g f x =成立,则称函数()f x 与()g x 在M 上互为“H 函数”.(1)函数()2f x x =与()sin g x x =在M 上互为“H 函数”,求集合M ;(2)若函数()x f x a =(0a >且1a ≠)与()1g x x =+在集合M 上互为“H 函数”, 求证:1a >;(3)函数()2f x x =+与()g x 在集合{|1M x x =>-且*23,}x k k ≠-∈N 上互为“H 函数”,当01x ≤<时,2()log (1)g x x =+,且()g x 在(1,1)-上是偶函数,求函数()g x 在集合M 上的解析式.参考答案一. 填空题1. 右2. 2-x3. (1,0]-4. 15. 1(,)2+∞6. y =,[1,)x ∈+∞7. {|3y y =或18}8. 19. 23x << 10. 130 11. 4- 12. 2a ≤二. 选择题13. B 14. D 15. D 16. C三. 解答题17. (1)),3[)2,(+∞--∞Y ;(2)12a ≥,06b <<. 18. (1)11(,)45x ∈--;(2)(1,2]{3,4}U .19. (1)1k =,5b =;(2)当4x =时,关税税率最大值为500%.20. (1)既不是奇函数,也不是偶函数;(2)2log (11x =+-或1x =-;(3)当1b <-时,a ∈(1,1)b b +-;当13b -≤<时,a ∈(1b +;当30b ≤<时,a ∈∅.21. (1){|}M x x k π==,k ∈Z ;(2)略;(3)2()log (1|2|)2g x x n n =+-+.。

上海市复兴高级中学高三上第二次周测数学试题(无答案)

上海市复兴高级中学高三上第二次周测数学试题(无答案)

上海市复兴高级中学高三上第二次周测数学试题(无答案)复兴高级中学2019-2019学年度第一学期高三数学周测卷二一、填空题(1-6题每题4分,7-12题每题5分,共54分) 1.已知()0loglog 52=x ,则=x ________.2.函数()34log 221-+-=x xy 的单调递增区间是________.1---=a x a x y 的图象的对称中心是P(4,1),则实数=a _______.4.函数()xx x f 2221-⎪⎭⎫⎝⎛=的值域是___________.5.函数4522++=x x y 的值域为_________.6.若,2lg lg =+y x ,则yx 11+的最小值为________. 7.若函数()a x x x f +++=1的最小值为1,则实数a 的值为________.8.关于x 的方程1+=ax x 有且仅有一个负根,则实数a的取值范围是________.9.已知函数()xxx f +=5,对任意的[]()()0222<,,x f mx f m +--∈恒成立,则x 的取值范围是____________.10.函数()x f 的定义域为实数集R,()⎪⎩⎪⎨⎧≤--⎪⎭⎫ ⎝⎛≤≤=0112110<,,x x x x f x对于任意的R x ∈都有()()11-=+x f x f .若在区间[]31,-上函数()()m mx x f x g --=恰有四个不同的零点,则实数m的取值范围是____________.11.设()x f 是定义在R 上的奇函数,且对于任意的()()x f x f R x -=+∈11,恒成立,当[]10,∈x 时,()x x f 2=,若关于x的方程()ax x f =有5个不同的解,则实数a 的取值范围是_______________. 1“求不等式xx x543<+的解”有如下思路:原不等式可变为15453<x x⎪⎭⎫ ⎝⎛+⎪⎭⎫ ⎝⎛,考虑函数()xxx f ⎪⎭⎫⎝⎛+⎪⎭⎫ ⎝⎛=5453可知,()12=f ,且函数在R 上单调递减,原不等式的解集是()∞+,2。

清华附中2019年高考模拟试卷-高考模拟

清华附中2019年高考模拟试卷-高考模拟

清华附中2019年高考模拟试卷-高考模

文章内容预览第Ⅰ卷(选择题共30分)一、本大题共5小题,每小题3分,共15分。

1.下列各组词语中加点的字的读音全都相同的一组是()A.祈祷稽首杞人忧天乞哀告怜B.魁梧窥探发聋振聩揆情度理C.缉私跻身放荡不羁反唇相讥D.饼铛嗔怪瞠目结舌称孤道寡2.下列各组词语中没有错别字的一组是()A.寒喧干涸兴高采烈哄堂大笑B.睿智池塘绵里藏针世外桃园C.矫情证券走头无路川流不息D.暴躁楹联怨天尤人变本加厉3.依次填入下列横线处的词语,恰当的一组是()①对这些人来说,仅靠道德上的自律或者单纯的宣传教育,并不一定_________,因此,加强管理并严格执法,是非常必要的。

②血栓闭塞性脉管炎的病因至今__________不清楚,一般认为与吸烟等因素有关。

③人们__________要对质量、花色进行挑选,还要追求品牌和时尚,体现个性与修养,服装业也由此演变成了一个色彩斑斓的时尚产业。

A.奏效尚不但B.奏效尚且不单C.生效尚且不单D.生效尚不但4.下列各句中,加点的成语使用不正确的一项是()A.《狼图腾》在中国当代文学史上是一个灿烂的存在。

作者笔下的草原狼,是生物的狼,
也是人文的狼;是现实的狼,也是历史的狼。

这部书堪称为一部力透纸背的大书。

B.xxxx年辽宁省黄河汽车制造厂产值和税收要超历史,而成本要降到历史最低点,他们确立的这个目标,真可谓首鼠两端,均要创最佳。

C.新中国的航天事业是白手起家,…………本文浏览权限:管理员高级用户VIP用户。

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复旦附中青浦分校高三数学周练01
2019.09
一. 填空题
1. 已知点(1,5)A -和向量(2,3)a =r ,若3AB a =uu u r r ,则点B 的坐标为
2. 若集合{||1|2}A x x =-<,2{|2}4
x B x x -=<+,则A B =I 3. 已知(12i)510i z -=+(i 是虚数单位),则z =
4. 若圆22240x y x y ++-=被直线30x y a ++=平分,则a 的值为
5. 函数22cos sin y x x =-的最小正周期是
6. 数列*2{(),}3n n ∈N 所有项的和为
7. 在正方体1111ABCD A B C D -中,M 为棱11A B 的中点,则异面直线AM 与1B C 所成的角的大小为 (结果用反三角函数值表示)
8. 已知数据1x 、2x 、⋅⋅⋅、8x 的方差为16,则数据121x +、221x +、⋅⋅⋅、821x +的标准差为
9. 在上海高考改革方案中,要求每位高中生必须在理科学科:物理、化学、生物,文科学科:政治、历史、地理这6门学科中选择3门学科参加等级考试,小王同学对理科学科比较感兴趣,决定至少选择两门理科学科,那么小王同学的选科方案有 种
10. 若函数()f x a 的取值范围为
11. 已知圆锥的母线长为5cm ,侧面积为152cm π,则此圆锥的体积是 3cm
12. 锐角三角形ABC 的三个内角度数成等比数列,若2B A ∠=∠,则A ∠=
二. 选择题
13.“函数()sin()f x x ϕ=+为偶函数”是“32
πϕ=”的( ) A. 充分不必要条件 B. 必要不充分条件
C. 充分必要条件
D. 既不充分也不必要条件
14. 下列四个命题:
① 任意两条直线都可以确定一个平面;
② 若两个平面有3个不同的公共点,则这两个平面重合;
③ 直线a 、b 、c ,若a 与b 共面,b 与c 共面,则a 与c 共面;
④ 若直线l 上有一点在平面α外,则l 在平面α外;
其中错误命题的个数是( )
A. 1
B. 2
C. 3
D. 4
15. 已知圆M 过定点(2,0),圆心M 在抛物线24y x =上运动,若y 轴截圆M 所得的弦为AB ,则||AB 等于( )
A. 4
B. 3
C. 2
D. 1
16. 下列四个命题:
(1)AB 是圆O 的直径,EF 切圆O 于C ,AD EF ⊥
于点D ,2AD =,6AB =,则AC 长为23; (2)若不等式|2||3|x x a -++<的解集为∅,则a 的取值范围为,5]∞(-;
(3)参数方程2cos 2cos2x y αα
=⎧⎨=-⎩(α是参数)表示的曲线的普通方程为2
32x y =+; (4)设()f x 、()g x 的定义域均为D ,()()()h x f x g x =+,若()f x 、()g x 的最大值分别为M 、N ,()f x 、()g x 的最小值分别为m 、n ,则()h x 的值域为{|}x m n x M N +≤≤+. 其中正确的是( )
A. (1)(4)
B. (1)(2)(3)
C. (2)(3)
D. (3)(4)
三. 解答题
17. 从等腰直角三角形纸片ABC ,剪如图所示的两个正方形,其中2BC =,90A ∠=︒.
(1)求正方形边长x 的范围;
(2)这两个正方形的面积之和的最大值.
18. 已知向量1(cos ,)2
a x =-r ,(3sin ,cos2)
b x x =r ,x ∈R ,设函数()f x a b =⋅. (1)求()f x 的最小正周期;
(2)求()f x 在[0,]2
π
上的最大值和最小值.
19. 如图已知长方体1AC 中棱1AB BC ==,12BB =,连接1B C ,过B 点作1B C 的垂线交1CC 于E ,交1B C 于F .
(1)求证:1
AC ⊥平面EBD ; (2)求点A 到平面111A B C 的距离;
(3)求平面11A B C 与直线DE 所成角的正弦值.
20. 已知等比数列{}n a 满足:23||10a a -=,123125a a a =.
(1)求数列{}n a 的通项公式;
(2)是否存在正整数m ,使得121111m
a a a ++⋅⋅⋅+≥?若存在,求m 的最小值,若不存在,说明理由.
21. 已知椭圆2
214
x y +=,P 是圆2216x y +=上任意一点,过P 的直线PA 、PB 与椭圆都只有一个公共点A 、B ,求:
(1)设00(,)A x y ,求证:直线PA 方程为0014
xx yy +=; (2)设(,)P m n ,求证:直线AB 方程为14mx ny +=; (3)数量积PA PB ⋅uu r uu r 的最大值及最小值.
参考答案
一. 填空题
1. (5,14)
2. (1,2)-
3. 34i --
4. 1
5. π
6. 2
7.
8. 8
9. 10 10. 1a > 11. 12π 12.
二. 选择题
13. B 14. C 15. A 16. D
三. 解答题
17.(1)12[,]33x ∈;(2)5
9.
18.(1)π;(2)最大值为1,最小值为1
2-.
19.(1)证明略;(2;(3)1
5.
20.(1)5(1)n n a =⨯-或253n n a -=⨯;(2)不存在.
21.(1)证明略;(2)证明略;(3)最大值为165
16,最小值为33
4.。

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