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2017-2018学年上海市上海中学高一数学周练(10.13)

2017-2018学年上海市上海中学高一数学周练(10.13)
2017-2018学年上海市上海中学高一数学周练(10.13)

上海中学高一周练数学卷

2017.10.13

一. 填空题

1. 下列不等式的解为:①2560x x -+< ,②2560x x -++<

2. 写出命题:若2017x y +≠,则2016x ≠或1y ≠的等价命题

3. 已知:11a b -≤+≤,且13a b ≤-≤,则3a b -的取值范围为

4. 不等式20ax bx a ++<(0)ab >的解集是空集,则222a b b +-的取值范围是

5. 不等式20ax bx c ++>的解集是1(,3)2-

,则不等式20cx bx a ++<的解集为 6. 已知12

a ≥,22()f x a x ax c =-++,对于任意[0,1]x ∈,()1f x ≤恒成立,则实数c 的 取值范围是 7. 已知实数,x y 满足2241x y xy ++=,则2x y +的最大值为

8. 若不等式2051x px ≤++≤恰好有一个实数值为解,则p =

9. 若下列三个方程:24430x ax a +-+=,22(1)0x a x a +-+=,2220x ax a +-=中 至少有一个方程有实根,则a 的取值范围是

10. 已知,,a b c 为互不相等的整数,则22224()()a b c a b c ++-++的最小值为

11. 已知,a b R ∈,关于x 的方程432210x ax x bx ++++=存在一个实根,则22a b +的最 小值为

二. 选择题

1. 集合{|41,}A x x k k Z ==+∈,{|42,}B x x k k Z ==+∈,{|43,}C x x k k Z ==+∈ 若a A ∈,b B ∈,c C ∈,则( )

A. abc A ∈

B. abc B ∈

C. abc C ∈

D. abc A

B C ? 2. 设a 和b 都是非零实数,则不等式a b >和11a b

>同时成立的充要条件是( ) A. 0a b >> B. 0a b >> C. 0a b >> D. 以上答案均不对

3. 假设n 是不小于3的正整数,n 个给定的实数12,,,n x x x ???具有如下性质:对任意一个二 次函数()y f x =,数12(),(),,()n f x f x f x ???中至少有三个数相同,则下列对于12,,,n x x x ??? 的判断中,正确的是( )

A. 至少有三个数是相同的

B. 至少有两个数是相同的

C. 至多有三个数是相同的

D. 至多有两个数是相同的

4. 当一个非空数集F 满足“如果,a b F ∈,则,,a b a b ab F +-∈,且0b ≠时,a F b

∈” 时,我们称F 就是一个数域,以下四个关于数域的命题:① 0是任何数域的元素;② 若数 域F 有非零元素,则2016F ∈;③ 集合{|3,}P x x k k Z ==∈是一个数域;④ 有理数集 是一个数域;其中真命题有( )个。

A. 0

B. 1

C. 2

D. 3

三. 解答题

1. 解关于x 的不等式[(3)1](1)0m x x +-+>()m R ∈;

2.(1)是否存在实数p ,使得40x p +<是2

20x x -->成立的充分不必要条件?如果存 在,求出p 的取值范围,如果不存在,说明理由;

(2)是否存在实数p ,使得40x p +<是220x x -->成立的必要不充分条件?如果存在, 求出p 的取值范围,如果不存在,说明理由;

3. 已知集合22

{|410813,,}A t t a ab b a b a Z b Z ==++--+∈∈,对于任意的x A ∈, y A ∈,判断元素xy 与集合A 的关系,并证明你的结论;

4. 已知二次函数()y f x =的二次项系数是1,并且一次项系数和常数项都是整数,若(())0f f x =有四个不同的实数根,并且在数轴上四个根成等距排列,试求二次函数()y f x =的解析式,使得其所有项的系数和最小;

参考答案

一. 填空题

1. (2,3)、(,1)

(6,)-∞-+∞ 2. 若2016x =且1y =,则2017x y +=

3. [1,7]

4. 4[,)5-+∞

5. 1(2,)3-

6. 34c ≤

7.

8. 4p =±

9. 32a ≤-或1a ≥- 10. 2 11. 8

二. 选择题

1. B

2. A

3. B

4. D

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