安徽省皖南八校2021届高三数学10月份第一次联考试题 理
安徽省皖南八校2021届高三数学10月份第一次联考试题 理
考生注意: 1. 本试卷分第I 卷(选择题)和第II 卷(非选择题)两部分。
满分150 分,考
试时间 120 分钟。
2.
考生作答时,请将答案答在答题卡上。
第I 卷每小题选出答案后,用2B 铅笔把
答题卡上对应题目的答案标号涂黑;第II 卷请用直径0. 5 毫米黑色墨水签字笔在答题卡上各题的答题区域内作答,超出答题区域书写的答案无效,在试题卷、草稿纸上作........................答无效...。
3.
本卷命题范围:集合与常用逻样用语,函数、导数及其应用(含定积分),三
角函数、解三角形,平面向量与复数。
第I 卷(选择题 共60 分)
一、选择题:本大题共 12小题,每小题 5分,共60分.在每小题给出的四个选项中,只有一项是符合题目要求的.
1.
已知集合2
{|20}M x x x =--≤,{|π}x
N y y ==,则M ⋂N =
A. (0, 2]
B.(0, 1]
C.[-2 ,+∞ )
D.[-l ,+∞) ,
2. 已知复数z 满足2i z z -=, 则z 的虚部是.
A.-1
B.1
C.-i
D.i
3.
已知实数x >0, y >0, 则“ xy < l”是“113
3
log log 0x y +>”"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
4.
若tan =-2,则sin(一π) • cos(π+) =
A.
45
B.
2
5
C. 25
±
D.-
25
5.
定积分
2
22
(sin 4)d x x x -+-⎰
的值是
A.
π
2
B.π
C.2π
D.
3π2
6. 设向量a = (0,2),b = (2,2),则 A.|a |=|b |
B.( a - b )// b
C. a 与 b 的夹角为π3
D. ( a - b )⊥a
7.
已知0.3
e
5
1e ,(),log 7,sin 42
a b c d ====,则
A.a > b > c >d
B.a > c > b > d C . d > b >a >c D.b >a >d >c
8. 某特种冰箱的食物保鲜时间y (单位:小时)与设置储存温度x (单位:︒C)近似满足函
数关系3
kx b
y +=(k ,b 为常数),若设置储存温度0°C的保鲜时间是288小时,设置储存温度
5︒C 的保鲜时间是144 小时,则设置储存温度15︒C 的保鲜时间近似是
2
A. 36小时
B. 48小时
C.60小时
D.72小时 9.
将函数π()sin()3f x x =-的图象横坐标缩短到原来的1
2(纵坐标不变),然后向左平移
π3
个单位,所得函数记为g (x ). 若1212π
,(0,),2
x x x x ∈≠,且12()()g x g x =,则12()g x x +=
A. 12-
B. 32-
C. 12
D.
3
2
10. 如图,地面四个5G 中继站A 、B 、C 、D , 已知 CD = (62+)km ,∠ADB =∠CDB =30︒,∠DCA =45︒,∠ACB = 60︒,则 A 、B 两个中继站的距离是 A. 43km B. 210km C. 10km D. 62km 11. 已知函数23
()(3)e 2
x
f x x x =-⋅,则 A. 函数 f ( x ) 的极大值点为 x = 2 B. 函数 f ( x ) 在 (-∞ , -2)上单调递减 C. 函数 f (x ) 在 R 上有 3 个零点
D.
函数 f (x ) 在原点处的切线方程为 y = -3x
12. 已知函数|4|2,2,
()2(4), 2.x x f x f x x +-<-⎧=⎨-≥-⎩
以下结论正确的个数有
①507
(2020)2f =;
②方程1
()14
f x x =
-有四个实根; ③当[6,10)x ∈时,()8|8|16f x x =-- ;
④若函数y = f (x )一t 在( -∞,10)上有8个零点x i (i = 1, 2, 3,…, 8),则8
1
()
i
i
i x f x =∑的取值范围为(-16 , 0 ) .
A. l
B. 2
C. 3
D. 4
第1I 卷(非选择题 共 90 分 )
二、填 空题:本大题共 4 小题,每小题 5分,共 20
分.把答案填在题中的横线上.
13.设函数f (x )是R 内的可导函数,且f (ln x )=x ln x ,则f´(1)= .
14. 已知函数||2
21()()e π
x f x x π
-=+-,则不等式(1)(21)f x f x -<-的解集是 .
15. 将函数()cos (0)f x x ωω=>的图象向左平移π
6
个单位长度后,得到函数y = g (x )的图
3
象,若函数g (x )在区间π[0,]2
上是单调递减函数,则实数ω的最大值为 . 16. 如图,已知△ABC 为边长为2的等边三角形,动点P 在以BC 为直径的半圆上,若
AP AB AC λμ=+,则2λμ+的最小值为 .
三、解答题:本大题共6,小题,共70分.解答应写出必要的文字说明、证明过程及演算步骤. 17. (本小题满分10 分)
已知函数()sin()f x A x ωϕ=+,其中ππ
0,0,,22
A x ωϕ>>-<<∈R , 其部分图象如图所示.
(1)求函数y =f (x ) 的解析式;
(2) 已知函数g (x ) = f (x )cos x ,求函数g (x )的单调递增区间.
18. (本小题满分12 分)
已知函数2()(14)x m
f x x x
+=≤≤, 且f (l ) = 5.
(1) 求实数 m 的值 ,并求 函 数 f ( x ) 的 值 域;
(2) 函数 g (x )=ax -l ( - 2< x < 2),若对任意x ∈[1,4], 总存在x 0 ∈[-2,2],使得
g (x 0)=f (x 1)成立,求实数a 的取值范围.
4
19. (本小题满分12分)
在△ABC 中,角 A 、B 、C 的对边分别是a 、b 、c , 且满足2
7
4cos cos 2()22
A B A B +-+=. (1) 求角C ;
(2) 设D 为边AB 上的点,CD 平分∠ACB ,且 CD = l, 若△ACD 与△BCD 的面积比 2 : 1 ,求 AC 长.
20. (本小题满分12分) 设函数1
()(,0)f x a b a bx
=
>+ . (1)若函数f ( x )在x = l 处 的切线方程是bx + 4y - 3 =0 , 求实数 a , b 的值; ( 2) 0在 (1)的条件下,若2(x - k )f ( x )≥ln x 对于0<x ≤1恒成立,求实数k 的取值范围.
21. (本小题满分12 分)
某科技公司生产某种芯片.由以往的经验表明,不考虑其他因素,该芯片每日的销售量y (单位:枚)与销售价格x (单位:元/枚,10<x ≤50):当10<x ≤30时满足关系式y = m ( x -30)2
+n
x -10
,(m , n
为常数);当30< x ≤50时满足关系式y =-70x
4900.已知当销售价格为20 元/枚时,每日可
售出该芯片7000 枚;当销售价格为30 元/枚时,每日可 售出该芯片1500枚. (1 ) 求 m , n 的值,并确 定 y 关 于x 的函数解析式 ;
( 2 ) 若该芯片的成本为 10 元/枚,试确定销售价格 x 的值,使公司每日销售该芯片所获利润
f ( x )最大. ( x 精确到 0. 01 元/枚)
22. (本小题满分12 分)
已知函数()e 1(,,0)x
f x a bx a b ab =⋅--∈≠R . (1) 讨论f (x )的单调性;
(2)证明:当π(0,)2
x ∈时,2
(1)2(sin )1(22)lnsin x x x x x +->++.。
高考语法填空考点解析之非谓语动词(高考真题+答案详解)
语法填空解题技巧之非谓语动词【剖析全国高考真题】——预测高考命题方向非谓语动词近三年考点分布高考真题1.(2020·新课标I卷)Chinese researchers hope to use the instruments onboard Chang’e-4 _____ (find) and study areas of the South Pole-Aitken basin.2. (2020·新课标II卷)They are easy _______ (care) for and make great presents.3. (2020·新课标III卷)The next morning he hired a boat and set out ______ (find) the well-known painter.4. (2020·浙江卷) Agriculture gave people their first experience of the power of technology ______(change)lives.5.(2020·新课标II卷)They represent the earth __________ (come) back to life and best wishes for new beginnings.6. (2020·新课标II卷语法填空)They make great gifs and you see them many times ________ (decorate) with red envelopes and messages of good fortune.7. (2020·新课标III卷)And when he saw the mists rising from the river and the soft clouds________ (surround) the mountain tops, he was reduced to tears.8.(2020·山东新高考) As well as looking at exhibits, visitors can play with computer simulations (模拟) and imagine themselves living at a different time in history or _____(walk)through a rainforest.9. (2020·浙江卷语)Later,they learned to work with the seasons,planting at the right time and,in dry areas,_________ (make)use of annual floods to irrigate(灌溉)their fields.10. (2020·新课标II卷)They represent the earth ______ (come) back to life and best wishes for new beginnings. 12.(2020·山东新高考) As well as looking at exhibits, visitors can play with computer simulations (模拟) and imagine themselves living at a different time in history or ______(walk)through a rainforest.13.(2019全国I卷)Modem methods of tracking polar bear populations have been employed only since the mid-1980s, and are expensive ______ (perform) consistently over a large area.14.(2019全国III卷)On our way to the house,it was raining so hard that we couldn't help wondering how long it would take _____ (get)there.15.(2019浙江高考)But some students didn't want ______ (wear) the uniform.16. (2019·北京卷)Nervously _____ (face) challenges, I know I will whisper to myself the two simple words “Be yourself”.17.(2019全国II卷)When we got a call ______ (say)she was short-listed,we thought it was a joke.18.(2019全国III卷)On the last day of our week-long stay,we were invited to attend a private concert on a beautiful farm on the North Shore under the stars,_____ (listen)to musicians and meeting interesting locals.19.(2019浙江高考)When the children are walking or ______ (cycle) to school on dark mornings, car drivers can easily see them.20.(2019全国I卷)Scientists have responded by _____ (note) that hungry bears may be congregating(聚集) around human settlements, leading to the illusion(错觉) that populations are higher than they actually are.21.(2019全国II卷)A 90-year-old has been awarded “Woman Of The Year” for ______ (be)Britain's oldest full-time employee-still working 40 hours a week.22.(2019浙江高考)When the children are walking or ______ (cycle) to school on dark mornings, car drivers can easily see them.23. 【2018·全国II】Another reason for corn's rise: The government encourages farmers to grow corn instead of rice ______ (improve) water quality.24. 【2018·全国III】Once his message was delivered, he allowed me ________ (stay)and watch.25. 【2018·全国II】That prevented the emission(排放) of 51.8 million tons of carbon dioxide. China's approach to protecting its environment while ______ (feed) its citizens "offers useful lessons for agriculture and food policymakersworldwide." says the bank's Juergen V oegele.26. 【2018·全国III】I quickly lower myself, ducking my head to avoid ________(look) directly into his eyes so he doesn't feel________(challenge).27.【2018·全国I】You don't have to run fast or for long to see the benefit. You may drink, smoke, be overweight and still reduce your risk of ______ (die) early by running.28. 【2018·全国III】I quickly lower myself, ducking my head to avoid ________(look) directly into his eyes so he doesn't feel challenged.29. 【2018·浙江】I still remember ______ (visit) a friend who’d live d here for five years and I was shocked when I learnt she hadn’t cooked once in all that time.练习突破【做题实践中找规律】【例1】【安徽省皖南八校2021届高三10月份第一次联考】Following the Japanese surrender in 1945, Chiang Kai-shek’s Nationalist Government reoccupied the Headquarters-Presidential Palace for ______ (govern) the Republic of China.【广西钦州市、崇左市2021届高三上学期第一次教学质量检测】The World Health Organization (WHO) says 【例2】that 80% of the world’s teens don’t get enough exercise to live healthy lives. The report, which was published in The Lancet in 2019, was based on research done with students ______(age) 11 to 17 in 146 different countries.【吉林省吉林市2021届高三上学期第一次调研考试】A Weibo user remarked, “Li’s success lies in her passion 【例3】for life.” Another Weibo user wrote, “Thank you for giving me an opportunity_____ (appreciate) the landscape in the countryside.”【例4】【宁夏银川一中2021届高三第三次月考】Food items themselves have meaning _____(attach) to them. In many Western countries, a box of chocolate would be viewed as an appropriate gift.【例5】【宁夏银川一中2021届高三第三次月考】Because people and food are mobile, _____(try) to define a country’s culture by what they eat i s often inaccurate.【吉林省长春市普通高中2021届高三质量检测】The Chinese master carpenter, Wang Dewen, ______ (know) 【例6】as “Grandpa Amu” on YouTube, has been considered as the modern-day Lu Ban.【吉林省长春市普通高中2021届高三质量检测】His most popular video, which shows him making a fantastic 【例7】wooden arch bridge, rose to fame on the platform, _______ (gain) more than 42 million views.【例8】【四川省南充高中2021届高三第二次月考】China has named 24,126 primary and middle schools across the country specialist football schools ______(lead) youth football development, according to the Ministry of Education (MOE).【例9】【江西省赣州市会昌县七校2021届高三联合月考】This is the first time a large group of scientists havejointly(共同地) used the word "emergency" when ______ (talk) about climate change."【例10】【云贵川桂四省2021届高三上学期10月联合考试】Scientists around the world are looking for all kinds of ways to protect and maybe even revive corals. One option is _______ (create) more marine protected areas-essentially national parks in the ocean.【例11】【江西省赣州市会昌县七校2021届高三联合月考】The scientists appealed to nations _______ (use) energy more efficiently and cut their use of fossil fuels.【例12】【山西省长治市2021届高三期中考试联考】I got tired of studying and finally I refused to attend class, _______(shut) myself in my room for hours.【例13】【河南省2020-2021学年高三毕业班阶段性测试(二)】The crossbow had the advantage of not only______(send)an arrow with enough force to cut through body armor(盔甲)but its arrows, being short, could not be shot back by bowmen.规律方法:如何判断空格处应填非谓语动词?(1) 正确判断非谓语动词。
安徽省皖南八校2021届高三数学第一次联考试题 文
安徽省皖南八校2021届高三(上)第一次联考数学试卷(文科)一.选择题(每题5分,共50分)1.设全集U={﹣2,﹣1,0,1,2},集合A={﹣1,1,2},B={﹣1,1},那么A∩(∁UB)为()A.{1,2} B. {1} C. {2} D. {﹣1,1}2.函数y=的概念域为()A.(﹣∞,] B.(﹣∞,) C.(0,] D.(﹣∞,0)∪(0,]3.已知复数,那么在复平面内对应的点位于()A.第一象限 B.第二象限C.第三象限D.第四象限4.假设a=20.3,b=sin1,c=log30.2,那么()A.b>c>a B. b>a>c C. c>a>b D. a>b>c5.已知f(x)=那么f((1))的值是()A.0 B.﹣2 C. 1 D.﹣16.等于()A.sin2+cos2 B. cos2﹣sin2 C.﹣sin2﹣cos2 D. sin2﹣cos27.已知△ABC中,a=,b=,B=60°,那么角A等于()A.45° B.60°C.120°或60°D.135°或45°8.已知向量,知足||=||≠0,且关于x的函数f(x)=x3+||x2+•x+2021在R上有极值,那么与的夹角θ的取值范围为()A.(0,] B.(,π]C.(,π]D.(,)9.把曲线ysinx﹣2y+3=0先沿x轴向左平移个单位长度,再沿y轴向下平移1个单位长度,取得曲线方程是()A.(1﹣y)cosx+2y﹣3=0 B.(1+y)sinx﹣2y+1=0C.(1+y)cosx﹣2y+1=0 D.﹣(1+y)cosx+2y+1=010.已知函数f(x)=ax3﹣3x2+1,假设f(x)存在唯一的零点x0,且x0>0,那么a的取值范围是()A.(2,+∞)B.(1,+∞)C.(﹣∞,﹣2)D.(﹣∞,﹣1)二.填空题(每题5分,共25分)11.已知sinα﹣cosα=,那么sinαcosα=_________ .12.已知向量=(1,﹣2),=(﹣3,2),那么= _________ .13.设直线y=x+b是曲线y=lnx(x>0)的一条切线,那么实数b的值为_________ .14.已知函数y=sin(ωx+φ)(ω>0,0<φ≤)的部份图象如示,那么φ的值为_________ .15.已知函数y=f(x)对任意x∈R有f(x+1)=﹣,且当x∈[﹣1,1]时,f(x)=x2+1,那么以下命题正确的选项是:①函数y=f(x)是周期为2的偶函数;②函数y=f(x)在[2,3]单调递增;③函数y=f(x)+的最大值是4;④假设关于x的方程[f(x)]2﹣f(x)﹣m=0有实根,那么实数m的范围是[0,2];⑤当x1,x2∈[1,3]时,f()≥.其中真命题的序号是_________ .三.解答题(共6小题,共75分)16.(12分)在△ABC中,角A,B,C所对的边别离为a,b,c,已知cosA=.(1)求sin(B+C)的值;(2)假设a=2,S△ABC=,求b,c的值.17.(12分)已知命题p:≤0,命题q:(x﹣m)(x﹣m+2)≤0.m∈R,假设p是q的充分没必要要条件,求实数m的取值范围.18.(12分)函数f(x)对任意x,y∈(0,+∞)知足f(xy)=f(x)+f(y)且当x>1时,f(x)<0.(1)判定函数f(x)的单调性并证明相关结论;(2)假设f(2)=1,试求解关于x的不等式f(x)+f(x﹣3)≥2.19.(13分)已知向量=(mcosθ,﹣),=(1,n+sinθ)且⊥(1)假设m=,n=1,求sin(θ﹣)的值;(2)m=且θ∈(0,),求实数n的取值范围.20.(13分)设函数f(x)=x2+bx+c(b,c∈R),已知不论α,β为何实数,恒有f(cosα)≥0,f(2+sinβ)≤0.(1)求证:b+c=﹣1;(2)求实数c的取值范围.21.(13分)设函数f(x)=x3+ax2﹣a2x+m(a>0)(1)假设a=1时函数f(x)有三个互不相同的零点,求实数m的取值范围;(2)假设对任意的a∈[3,6],x∈[﹣2,2],不等式f(x)≤1恒成立,求实数m的取值范围.皖南八校2021届第一次联考数学(文科)参考答案一.选择题二.填空题11.1225 12.(2,2)- 13.ln 21- 14.3π 15.①②④ 三.解答题16.(总分值12分)解析:由上解得分123 ==c b17.(总分值12分)解析:关于命题1:0x p x -≤,得(1)00x x x -≤⎧⎨≠⎩,∴ 01x <≤………3分 关于命题:()(2)0q x m x m --+≤得2m x m -≤≤………………6分又因为p 是q 的充分没必要要条件∴p q ⇒∴201m m -≤⎧⎨≥⎩∴12m ≤≤………………………………………………………………12分18.(总分值12分)解析:()f x 在(0,)+∞上单调递减 …………3分注:第2小题由于校稿失误,故不评分,提供答案,仅供参考题:假设(2)1f =-,试求解关于x 的不等式()(3)2f x f x +-≥-.答案:{}43434)3(0300)()4())3((2)2()2()4(≤<∴≤<⎪⎩⎪⎨⎧≤->->∴∞+≥-∴-=+=x x x x x x x x f f x x f f f f 原不等式解集为解得)上单调递增,在(又原不等式可化为19.(总分值13分)解析a b ⊥,0a b ∴=cos 2(sin )02m θθ∴+=即cos 0m n θθ-=………………2分 ⑴2,1m n ==10θθ-=1θθ=1sin()42πθ∴-=-………………6分 ⑵2m=0n θθ-=sin )2cos(),(0,)42n ππθθθθ∴=-=+∈ (9)分n <<13分20.(总分值13分)解析: ⑴令30,2παβ== 得3cos 01,2sin 12π=+=1+0b c ∴+= 即1b c +=-………………6分⑵1b c +=- 1b c ∴=--又(2sin )0f β+≤ (3)0f ∴≤3c ∴≥………………13分21.(总分值13分)解析(1)当1a =时32()f x x x x m =+-+,因为()f x 有三个互不相同的零点,因此32()f x x x x m =+-+, 即32m x x x =--+有三个互不相同的实数根。
安徽省皖南八校近年届高三数学上学期第一次联考试题理(2021年整理)
安徽省皖南八校2019届高三数学上学期第一次联考试题理编辑整理:尊敬的读者朋友们:这里是精品文档编辑中心,本文档内容是由我和我的同事精心编辑整理后发布的,发布之前我们对文中内容进行仔细校对,但是难免会有疏漏的地方,但是任然希望(安徽省皖南八校2019届高三数学上学期第一次联考试题理)的内容能够给您的工作和学习带来便利。
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“皖南八校"2019届高三第一次联考数学(理科)第Ⅰ卷(选择题共60分)一、选择题:本大题共12小题,每小题題5分,共60分.在每小题给出的四个选项中,只有一项是符合题目要求的1.设集合{}{}20,21A x x x B x x =->=>,则A B =A .1(0,)2B .1(,1)2C .(0,)+∞D .(1,)+∞2.设i 是虚数单位,且20191i ki ki -=-,则实数k =A .2B .1C .0D .1- 3.函数()(0x f x a a =>且1)a ≠是增函数的一个充分不必要条件是A .102a << B .0〈a<1 C .2〈a<3 D .a 〉14.偶函数()f x 在(,0]-∞上是增函数,且(1)1f =-,则满足(23)1x f ->-的实数x 的取值范围是 A .(1,2) B .(—1,0) C .(0,1) D .(-1,1) 点,3BC EC =,5.如图在直角梯形ABCD 中,AB =2AD =2DC,E 为BC 边上一F 为AE 的中点,则BFA .1233AB AD - B . 2133AB AD -+C .1233AB AD -+ D .2133AB AD -6.若函数cos sin y x x =+在区间(-a ,a )上是单调函数,则实数a 的取值范围是 A .(0,]π B .3(0,]4π C .(0,]2π D .(0,]4π7.设不等式组220240330x y x y x y +-≤⎧⎪-+≥⎨⎪--≤⎩,所表示的平面区城为M,若直线(2)1y k x =--的图象经过区域M,则实数k 的取值范围是A .(,1]-∞-B .3[,1]2--C .3(,]2-∞- D .[1,3]-8.设{}n a 是等差数列,185,11a a ==,且11,1n n n a b b b +=-=,则11b = A .59 B .64 C .78 D .86 9.函数(4)log 1(0,1)x a y a a +=->≠的图象恒过定点A,若点A 在直线1x ym n+=-上,且 m >0,n >0,则3m +n 的最小值为A .13B .16C .1162+D .2810.函数()sin()(0,0,)2f x A x A πωϕωϕ=+>><的部分图象如图所示,将函数()f x 的图象向右()g x 的图象则平移个3π单位长度,再向上平移2个单位长度,得到()g x )图象的一条对称轴为直线A .12x π=B .4x π=C .3x π=D . 512x π=11.已知函数()f x 是定义在(0,)+∞上的单调函数,若对任意1(0,),(())2x f f x x∈+∞-=恒成立,则1()6f 的值是A .5B .6C .7D .812.设函数()f x 在R 上存在导数'()f x ,对任意的x R ∈,有()()0f x f x --=,且[0,)x ∈+∞时,'()2f x x >.若(2)()44f a f a a --≥-,则实数a 的取值范围为A .(,1]-∞B 。
安徽省皖南八校近年届高三数学第一次联考试题理(扫描(2021年整理)
安徽省皖南八校2019届高三数学第一次联考试题理(扫描版)
编辑整理:
尊敬的读者朋友们:
这里是精品文档编辑中心,本文档内容是由我和我的同事精心编辑整理后发布的,发布之前我们对文中内容进行仔细校对,但是难免会有疏漏的地方,但是任然希望(安徽省皖南八校2019届高三数学第一次联考试题理(扫描版))的内容能够给您的工作和学习带来便利。
同时也真诚的希望收到您的建议和反馈,这将是我们进步的源泉,前进的动力。
本文可编辑可修改,如果觉得对您有帮助请收藏以便随时查阅,最后祝您生活愉快业绩进步,以下为安徽省皖南八校2019届高三数学第一次联考试题理(扫描版)的全部内容。
安徽省皖南八校2019届高三数学第一次联考试题理(扫描版)。
安徽省皖南八校高三数学上学期第一次联考(10月)试题
皖南八校2016届高三第一次联考数学文试题一、选择题:本大题共12小题;每小题5分,共60分. 1.设集合A ={x |-1<x <4},B ={-1,1,2,4},则A I B = A .{ 1,2} B .{-1,4} C .{-1,2} D .{ 2,4} 2.在复平面内,复数(4+5i )i (i 为虚数单位)的共轭复数对应的点位于 A .第一象限 B .第二象限 C .第三象限 D .第四象限 3.要得到函数f (x )=cos(3)3x π-的图象向左平移3π后得到的图象,对应的函数为 A .y =cos(3)3x π+ B .y =sin(3)3x π+C .y =2cos(3)3x π+D .y =2sin(3)3x π+4.设0.332211log ,,log (log 43a b c ⎛⎫=== ⎪⎝⎭,则A .b <c <aB .a <b <cC .c <a <bD .a <c <b5.在△ABC 中,AB =1,AC =3,B =600,则cosC = A .一56 B .56C.一6 D.66.已知数列{a n }满足a 1=1,a n -1=2a n (n ≥2,n ∈N *),则数列{a n }的前6项和为 A 、63 B .127 C .6332D .127647、已知(sin cos )2223ββ-=-,则sin β的值为 AB 、-13C 、29D 、-798、己知实数x ,y 满足232423120x y y x x y ⎧≥-⎪⎪≤+⎨⎪+-≤⎪⎩,则2z x y =+的最大值与最小值之和为A 、-2B 、14C 、-6D 、29、已知平行四边形ABCD 的对角线分别为AC ,BD ,且2AE EC =u u u r u u u r,点F 是BD 上靠近D 的四等分点,则10、下列函数中,在区间(0,1)上单调递增的有A 、0个B 、1个C 、2个D 、3个 11、下列命题中是真命题的为 A .“存在”的否定是‘不存在”B .在△ABC 中,“AB 2+AC 2>BC 2”是“△ABC 为锐角三角形”的充分不必要条件 C .任意,31xx N ∈> D 、存在l2.若偶函数(),y f x x R =∈,满足(2)()f x f x +=-,且[0,2]x ∈时,2()3f x x =-,则方程()sin ||f x x =在[-10,10]内的根的个数为A ·12B .8C .9D .10第II 卷(非选择题共90分)本卷包括必考题和选考题两部分.第(13)题一第(21)题为必考题,每个题目考生都必须作答.第(22)题一第(24)题为选考题,考生根据要求作答. 二、填空题:共20分.把答案填在题中的横线上. 13.若1sin()7πα-=,α是第二象限角,则tan α= · 14.设数列{a n }的前n 项和为S n ,已知a 1=2,a n +1-a n =3,若Sn =57,则n = 15、已知函数()3xf x ae x =-+1的图象在点(0,f (0))处的切线方程为y =x +b ,则b =__16.已知直角梯形ABCD 中,AB ∥CD ,∠BCD =600,E 是线段AD 上靠近A 的三等分点,F 是线段DC 的中点,若AB =2,AD =3,则EB EF u u u r u u u rg =三、解答题:本大题共6小题,共75分.解答应写出必要的文字说明、证明过程及演算步骤. 17.(本小题满分12分)已知数列{a n }为公差不为零的等差数列,S 6=60,且1621,,a a a 成等比数列。
