2022年广东中考数学压轴题及答案 .pdf
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1、学习好资料欢迎下载20XX年广东中考数学压轴模拟题及答案1观察规律并填空(1)=?=;(1)(1)=?=(1)(1)(1)=?=?=;(1)(1)(1)(1)=?=?=;(1)(1)(1)(1)(1)=(用含 n 的代数式表示,n 是正整数,且n2)2(9 分)(20XX年云南省)为了解本校九年级学生期末数学考试情况,销量在九年级随机抽取了一部分学生的期末数学成绩为样本,分为A、B(8980 分)、C(7960 分)、D(590 分)四个等级进行统计,并将统计结果绘制成如下统计图,请你根据统计图解答以下问题:(1)这次随机抽取的学生共有多少人?(2)请补全条形统计图;(3)这个学校九年级共有学
2、生1200 人,若分数为80 分(含 80 分)以上为优秀,请估计这次九年级学生期末数学考试成绩为优秀的学生人数大约有多少?学习好资料欢迎下载3.如图所示,抛物线y=ax2+bx+c(a0)与x 轴、y 轴分别相交于A(?-1,0)、B(3,0)、C(0,3)三点,其顶点为D 注:抛物线y=ax2+bx+c(a0)的顶点坐标为(2ba,244acba)(1)求经过A、B、C三点的抛物线的解析式;(2)求四边形ABDC 的面积.4在平面直角坐标系Oxy中,抛物线kxxy42(k 是常数)与x轴相交于 A、B两点(B在 A的右边),与 y 轴相交于 C 点求 k 的取值范围;若OBC 是等腰直角三
3、角形,求k 的值5如图 9,矩形 ABCD中,E 是 BC 上一点,将矩形沿AE 翻折后,点 B恰好与CD 边上的点 F 重合已知5AB,3AD文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3
4、 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1
5、O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3
6、 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1
7、O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3
8、 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1
9、O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5学习好资料欢迎下载OxyABCPD10图求 BE;求EAFtan6如图 10,抛物线4212xxy与坐标轴相交于 A、B、C 三点,P 是线段AB上一动点(端点除外),过 P 作ACPD/,交 BC 于点 D,连接
10、CP直接写出 A、B、C 的坐标;求PCD 面积的最大值,并判断当PCD的面积取最大值时,以PA、PD 为邻边的平行四边形是否为菱形答案:文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP
11、2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P
12、3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP
13、2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P
14、3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP
15、2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P
16、3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5学习好资料欢迎下载1.分析:由前面算式可以看出:算式的左边利用平方差公式因式分解,中间的数字互为倒数,乘积为1,只剩下两端的(1)和(1+)相乘得出结果解:(1)(1)(1)(1)(1)=?=故答案为:点评:此题考查算式的
17、运算规律,找出数字之间的联系,得出运算规律,解决问题2.分析:(1)抽查人数可由C等所占的比例为50%,根据总数=某等人数比例来计算;(2)可由总数减去A、C、D的人数求得B等的人数,再补全条形统计图;(3)用样本估计总体用总人数1200 乘以样本中测试成绩等级在80 分(含 80 分)以上的学生所占百分比即可解:(1)2050%=40(人),答:这次随机抽取的学生共有40 人;(2)B等级人数:405204=11(人)条形统计图如下:(3)1200100%=480(人),这次九年级学生期末数学考试成绩为优秀的学生人数大约有480 人文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 Z
18、P2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5
19、P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 ZP2A3W9Y2N5文档编码:CJ1O5P3K3R6 HQ7X1O1N4D3 Z
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