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【免费下载】精编安徽省滁州市琅琊区滁州第二中学20232024学年九年级上学期第一次月考数学试题

  • 2026-02-22 11:14:43
【免费下载】精编安徽省滁州市琅琊区滁州第二中学20232024学年九年级上学期第一次月考数学试题

2023/2024学年第一学期初三第一次月考

数学试卷

I(选择题)

一、单选题(每题4分,共40)

1. 下列函数中,属于反比例函数是()

A. B. C. D. 

2. 二次函数y=﹣3x2+2图象的顶点坐标为(  )

A. 0,0B. (﹣3,﹣2C. (﹣3,2D. 0,2

3. 已知正方形ABCD,设AB=x,则正方形的面积yx之间的函数关系式为(  )

A. y=4x                  y=x2x=

4. 下列函数中①,是二次函数的有()

A. B. ②③④C. ②③D. ②④

5. 二次函数y=ax2+bx+c的图象大致位置如图所示,下列判断错误的是()

A. a<0B. b>0C. c>0D. 

6. 把抛物线y=x2+bx+c的图象向右平移3个单位,再向下平移2个单位,所得图象的解析式为y=x23x+5,则(

A. b=3,c=7B. b=6,c=3C. b=9,c=5D. b=9,c=21

7. 函数在同一直角坐标系中的图象大致是(

AB. 

C. D. 

8. 反比例函数的图像经过点(1,-2),则此函数的解析式是(  )

A. y=2xB. y=-C. y=-D. y=x

9. 二次函数y=x2+px+q,当0≤x≤1时,此函数最大值与最小值的差(

A. pq的值都有关B. p无关,但与q有关

C. pq的值都无关D. p有关,但与q无关

10. 二次函数为常数且)中的的部分对应值如下表:

1

0

1

3

1

3

5

3

给出了结论:

1)二次函数有最大值,最大值为5;(2;(3时,的值随值的增大而减小;(43是方程的一个根;(5)当时,.则其中正确结论的个数是(

A. 4B. 3C. 2D. 1

II(非选择题)

二、填空题(每题5分,共20)

11. 已知二次函数图像的对称轴为直线,则________.(填“>”或“<”)

12. a﹣1≤x≤a时,函数y=x2﹣2x+1的最小值为1,则a的值为_____

13. 若反比例函数的图象经过第二、四象限,则的值为________

14. 若点A(﹣2,y1)、B(﹣1,y2)、C(1,y3)都在反比例函数y=(k为常数)的图象上,则y1、y2、y3的大小关系为________

三、解答题

15. 已知二次函数试证明:不论m取何值,这个二次函数图象必与x轴有两个交点

16. 已知二次函数y=x2+bx+c的图象经过点(0,2)和(1,﹣1),求图象的顶点坐标和对称轴.

17. 已知函数和函数的图象都经过点

(1)求的值;

(2)求两图象的另一交点.

18. 如图,抛物线x轴交于AB两点(A在点B左侧),与y轴交于C

(1)求点A、点C的坐标:

(2)轴交抛物线于D,连接的面积

19. 一次函数与反比例函数交于点A (1,3),B (3,m),

(1)分别求两个函数的解析式;

(2)根据图像直接写出,当x为何值时,

20. 一场暴雨过后,一洼地存雨水20米3,如果将雨水全部排完需t分钟,排水量为a3/分,且排水时间为5~10分钟.

(1)试写出ta的函数关系式,并指出a的取值范围;

(2)当排水量为3米3/分时,排水的时间需要多长?

21. 如图,一次函数图象与坐标轴交于点AB,二次函数的图象过AB两点.

(1)求二次数的表达式

(2)已知点在对称轴上,且点位于轴上方,连接,若P的坐标

22. 某商店销售一种进价100/件的商品,且规定售价不得超过进价的1.4倍,经市场调查发现:该商品的每天销售量(件)是售价(元/件)的一次函数,其售价、销售量的二组对应值如下表:

售价(元/件)

130

140

销售量(件/天)

80

60

(1)直接写出关于售价的函数关系式;

(2)设商店销售该商品每天获得的利润为(元),求之间的函数关系式,并求出当销售单价定为多少时,该商店销售这种商品每天获得的利润最大?

(3)若某天的利润不低于2000元,请直接写出的取值范围.

23. 如图,在平面直角坐标系中,一次函数的图象与反比例函数的图象交于点和点

(1)求一次函数与反比例函数的表达式

(2)直线x轴交于点D,与y轴交于点C

①过点C轴交反比例函数的图象于点E,连接,试判断的形状,并说明理由;

②设Mx轴上一点,当时,求点M坐标

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  1. CONNECT:[ UseTime:0.000637s ] mysql:host=127.0.0.1;port=3306;dbname=no_yeyulingfeng;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001014s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000384s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000239s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000536s ]
  6. SELECT * FROM `set` [ RunTime:0.000229s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000626s ]
  8. SELECT * FROM `article` WHERE `id` = 469469 LIMIT 1 [ RunTime:0.000891s ]
  9. UPDATE `article` SET `lasttime` = 1771735357 WHERE `id` = 469469 [ RunTime:0.000788s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000312s ]
  11. SELECT * FROM `article` WHERE `id` < 469469 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000482s ]
  12. SELECT * FROM `article` WHERE `id` > 469469 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000448s ]
  13. SELECT * FROM `article` WHERE `id` < 469469 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000782s ]
  14. SELECT * FROM `article` WHERE `id` < 469469 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000768s ]
  15. SELECT * FROM `article` WHERE `id` < 469469 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000675s ]
0.077768s