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武汉市江汉区2025-2026学年度第一学期元月调研考试九年级数学试题(图片版+word版)

  • 2026-10-15 15:43:02
武汉市江汉区2025-2026学年度第一学期元月调研考试九年级数学试题(图片版+word版)

江汉区2025-2026学年度第一学期元月调研考试九年级

数学试题

江汉区2025~2026学年度第一学期九年级元月调研考试

数学试题

一、选择题:(本题共10小题,每小题3分,共30分)

1.有两个事件,事件(1):走到十字路口,交通信号灯显示绿灯;事件(2):同时抛掷两枚质地均匀的硬币,全部正面朝上,下列判断正确的是()

A.(1)是随机事件,(2)是确定性事件B.(1)(2)都是随机事件

C.(1)是确定性事件,(2)是随机事件D.(1)(2)都是确定性事件

2.公元2026年是我国农历丙午年,属马年.春节期间,大小媒体会呈现大量以马为主题的文案,金马贺岁、马到成功!下列文字图案中,是轴对称图形的是()

ABCD

3.一元二次方程x2+2x-1=0的根的情况是()

A.只有一个实数根B.有两个相等的实数根C.没有实数根D.有两个不相等的实数根

4.函数y=-(x-1)2+2 的顶点坐标是()

A.(1,2)B.(-1,-2) C.(1,-2) D.(-1,2)

5.在平面中,已知⊙O的半径为4cm,点P在⊙O内,则OP的长()

A.等于或大于4cmB.大于4cmC.小于4cmD.等于4cm

6.某商品的价格是100元,连续两次降价x%后的价格是81元,则x是()

A.9B.10C.19D.8

7.如图,在△ABC中,∠BAC=70°,△ABC绕点A逆时针旋转得到△ADE.若AE⊥BD,则∠CAD的度数是()

A.160°B.150°C.140°D.130°

第7题图第9题图

8.盒子中有四个除颜色外一模一样的小球,其中两个红球,两个黄球.从中随机一次摸出2个球,刚好是“一个红球、一个黄球”的概率是()

A.B.C.D.

9.如图,等腰直角△ABC内接于半圆⊙O,D是AC上一点,AD沿弦AD翻折后与弦AC相交于点E,若E是AD的中点,则的值是()

A.B.+1C.+1D.

10.小强同学用描点法画二次函数y=ax2+bx+c(a,b,c为常数,a≠0)的图象.先取了自变量的8个值x1,x2,…,x8,满足x1<x2<…<x8,且相邻两数的差相等,然后计算出对应的函数值并列表如下.其中有一个函数值算错了,错误的是()

x

x1

x2

x3

x4

x5

x6

x7

x8

y

11.9

36.7

77.5

134.3

205.1

295.9

400.7

521.5

A.295.9B.205.1C.134.3D.77.5

二、填空题:(本题共6小题,每小题3分,共18分)

11.在平面直角坐标系中,点P(-3,5)关于原点对称的点的坐标是.

12.某射击运动员在同一条件下的射击成绩记录如下:

射击次数

20

40

100

200

400

1000

“射中9环以上”的次数

15

33

78

158

321

801

“射中9环以上”的频率

0.75

0.83

0.78

0.79

0.80

0.80

根据频率的稳定性,估计这名运动员射击一次时“射中9环以上”的概率是(结果保留小数点后一位).

13.报纸上刊登广告每平方厘米版面收取相同的广告费.李华要刊登广告,一块10cm×5cm的长方形版面要付180元的广告费,如果他要把版面的边长扩大为原来的3倍,则要付元广告费.

14.一个圆锥的侧面积是底面积的2倍,则这个圆锥侧面展开图的扇形的圆心角是.

15.如图,等边△DEF的顶点分别在等边△ABC的三边上,若△ABC和△DEF的边长分别是6和4,则△ADF的周长是,△ADF的内切圆的半径是.

16.抛物线y=ax2+bx+c(a,b,c为常数,a=0)经过(-1,-2),(1,0),(m,0)三点,其中m≠1.下列结论:①b=l;②若与y轴的交点在正半轴,则-1<m<0;③若关于x的不等式ax2+(b-1)x+c+1>0的解集是-1<x<1,则a>0;④若抛物线y=ax2+bx+c的顶点坐标为(h,k),则k>0或k≤-2;⑤抛物线y=ax2+bx+c上有两点(-t,y1),(+t,y2),满足当t>0时,恒有y1>y2成立,则a<-1.其中正确的是(填写序号).

三、解答题:(本题共8小题,共72分)

17.(本小题满分8分)关于x的一元二次方程x2十mx-8=0有一个根是x=4,求m的值及方程的另一个根.

18.(本小题满分8分)如图,E是正方形ABCD中CD边上一点,以点A为中心,把△ADE顺时针旋转90°,得到△ABF.连接BD,EF,BD与EF相交于点M.

(1)小强同学猜想M是EF的中点,他过点E作EH∥BF交BD于点H,然后发现了证明这个结论的方法,请帮小强同学完成证明过程;

(2)若正方形的边长为6,CE=2DE,直接写出AM的长.

19.(本小题满分8分)如图,线段AB的长为1.点C在线段AB上,满足关系式AC2=BC·AB.

(1)求线段AC的长度;

(2)点D在线段AC上,且AD2=CD·AC.直接写出线段AD与AC的数量关系.

20.(本小题满分8分)如图,四边形ABCD内接于⊙O,对角线AC,BD相交于点M,AC⊥BD.

(1)求证:∠AOB+∠COD=180°;

(2)已知AB=8,CD=6.

①直接写出⊙O的半径的长;

②若BC=3,直接写出劣弧AD的中点到弦AD的距离.

21.(本小题满分8分)如图是由小正方形组成的6×6的网格,正方形的顶点称为格点,图中B,M均为格点,点A,C在网格线上,⊙O是△ABC的外接圆.仅用无刻度的直尺在给定网格中完成画图,每个画图任务的画线不得超过三条.

(1)在图(1)中,画△ABC的中线AD;

(2)在图(1)中,画线段AC关于点M对称的线段AC;

(3)在图(2)中,在边AC上画点N,使AB2=AN·AC;

(4)在图(2)中,过点A画⊙O的切线.

22.(本小题满分10分)某商品的进价为每件40元,市场调查反映:商品现在的售价为每件60元,每星期可以卖出300件.如调整价格,每降价1元,每星期可多卖出20件.商场决定在不亏本的前提下降价销售.

(1)若每件商品降价元销售,直接写出该商品每星期的销售利润y(单位:元)与之间的函数关系式,并确定自变量x的取值范围;

(2)若每星期的销售利润为5720元,求该商品的实际售价;

(3)如何定价才能使销售利润最大?

23.(本小题满分10分)问题背景

如图,在四边形ABCD中,∠A=∠B.M是边AB上一点,N是边上一点,∠AMN=∠BMC.

(1)探究:如图(1),若N是边AD上一点,求证:=;

(2)变式:如图(2),若N是边CD的中点,BC=2AD,求的值;

问题迁移如图(3),在四边形ABCD中,AB=BC,∠ABC=60°,∠BCD=90°,点M在边AB上,∠AMD=∠BMC.若BC=5,CD=,直接写出MC的长.

24.(本小题满分12分)如图,在平面直角坐标系中,抛物线y=ax2-2ax-3 经过点P(1,-4),与坐标轴分别交于A,B,C三点.直线y=kx与抛物线交于D,E两点.

(1)直接写出的值和A,B两点的坐标;

(2)如图(1),直线x=m与直线DE相交于点F,与抛物线相交于点G,若k=-1,以O,C,F,G为顶点的四边形为平行四边形时,求m的值;

(3)如图(2),点M在抛物线上,DM∥AB,直线ME,PE分别交y轴于点N,Q,当k(k≠-4)变化时,是否为定值,若是,求其值,若不是,请说明理由.

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  1. CONNECT:[ UseTime:0.000778s ] mysql:host=127.0.0.1;port=3306;dbname=f460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001755s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000392s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000371s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001499s ]
  6. SELECT * FROM `set` [ RunTime:0.000375s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001522s ]
  8. SELECT * FROM `article` WHERE `id` = 469477 LIMIT 1 [ RunTime:0.000548s ]
  9. UPDATE `article` SET `lasttime` = 1792062609 WHERE `id` = 469477 [ RunTime:0.002743s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000371s ]
  11. SELECT * FROM `article` WHERE `id` < 469477 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000412s ]
  12. SELECT * FROM `article` WHERE `id` > 469477 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000420s ]
  13. SELECT * FROM `article` WHERE `id` < 469477 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000670s ]
  14. SELECT * FROM `article` WHERE `id` < 469477 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000473s ]
  15. SELECT * FROM `article` WHERE `id` < 469477 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000588s ]
0.072167s