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(完整word版)上海市八上期中数学试卷(带解析).pdf

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1、第 1 页HEDCBA八年级第一学期数学学科期中试卷（考试时间：90 分钟，满分 100 分）2017.11.题号一二三四总分得分一、选择题：（本大题共 6 题，每题 2 分，满分 12 分）1下列根式中，与12为同类二次根式的是.（）（A）2；（B）3；（C）5；（D）62下列二次根式中，属于最简二次根式的是（）（A）21；（B）8；（C）yx2；（D）yx23已知一元二次方程：2330 xx，2330 xx.下列说法正确的是（）（A）方程都有实数根；（B）方程有实数根，方程没有实数根；（C）方程没有实数根，方程有实数根；（D）方程都没有实数根.4.某种产品原来每件价格为800 元，经过两次

2、降价，且每次降价的百分率相同，现在每件售价为 578 元，设每次降价的百分率为x，依题意可列出关于x 的方程 .（）（A）2800(1%)578x；（B）2800(1)578x；（C）2578(1%)800 x；（D）2578(1)800 x5.下列命题中，真命题是.（）（A）两条直线被第三条直线所截，同位角相等；（B）两边及其中一边的对角对应相等的两个三角形全等；（C）直角三角形的两个锐角互余；（D）三角形的一个外角等于两个内角的和6.如图，在 ABC 中，ADBC 于 D，BEAC 于 E，AD、BE 交于点 H，且 HD=DC，那么下列结论中，正确的是.（）（A）ADC BDH；（B）H

3、E=EC；（C）AH=BD；（D）AHEBHD .（第 6 题图）精品资料-欢迎下载-欢迎下载名师归纳-第 1 页，共 7 页 -第 2 页二、填空题：（本大题共 12题，每题 3 分，满分 36分）7.化简：27_.8.如果代数式31x有意义，那么实数x的取值范围是 _.9.计算：28xyy_.10.写出1a的一个有理化因式是_.11.不等式：(32)1x的解集是 _.12.方程2xx的解为 _13.在实数范围内因式分解：241xx_ 14.如果关于x的一元二次方程02mxx有两个不相等的实数根，那么m 的取值范围是_15.如果关于x的一元二次方程22(1)10axxa的一个根是0，那么a

4、的值为 _.16.如图，已知点B、F、C、E 在一条直线上，FB=CE，AC=DF，要使 ABC DEF 成立，请添加一个条件，这个条件可以是_.17.将命题“两个全等三角形的面积相等”改写成“如果，那么 ”的形式：_.18.如图，在 ABC 中，CAB=70.在同一平面内，现将 ABC 绕点 A 旋转，使得点B 落在点 B，点 C落在点 C，如果 CC/AB，那么 BAB=_.三、解答题：（本大题共 4 题，第 1922 题，每题 6 分；第 23 题 8 分；第 2425 题每题 10分，满分 52 分）19.计算：1(32)(32)21.FEDCBA（第 16 题图）（第 18 题图）C

5、BCBA精品资料-欢迎下载-欢迎下载名师归纳-第 2 页，共 7 页 -文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N

6、4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3

7、HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G

8、10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6

9、 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2

10、T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V

11、2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2第 3 页FEDCBA20.用公式法解方程：2530 xx.21.用配方法解方程：212302

12、xx.22.已知：如图，ACCD 于 C，BDCD 于 D，点 E 是 AB 的中点，联结CE 并延长交 BD 于点 F.求证：CE=FE.23.如图，某工程队在工地互相垂直的两面墙AE、AF 处，用 180 米长的铁栅栏围成一个长方形场地ABCD，中间用同样材料分割成两个长方形.已知墙 AE 长 120 米，墙 AF 长 40 米，要使长方形ABCD 的面积为 4000平方米，问BC 和 CD 各取多少米？A F E D B C 精品资料-欢迎下载-欢迎下载名师归纳-第 3 页，共 7 页 -文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF

13、6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U

14、9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN

15、8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10

16、H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 Z

17、X2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3

18、R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文

19、档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2第 4 页EDCBA24我们知道：任意一个有理数与无理数的和为无理数，任意一个不为零的有理数与一个无理数的积为无理数，而零与无理数的积为零由此可得：如果 ax+b=0，其中 a、b 为有理数，x 为无理数，那么a=0 且b=0运用上述知识，解决下列问题：（1）如果0

20、32)2(ba，其中 a、b 为有理数，那么a=，b=；（2）如果5)21()22(ba，其中 a、b 为有理数，求a+2b 的值25如图，在四边形ABCD 中，AB/CD，B=ADC，点 E 是 BC 边上的一点，且AE=DC（1）求证：ABC EAD；（2）如果 ABAC，求证：BAE=2ACB精品资料-欢迎下载-欢迎下载名师归纳-第 4 页，共 7 页 -文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2

21、K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R1

22、0V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编

23、码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G

24、5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P

25、3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F

26、2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5

27、L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2第 5 页2017 学年第一学期八年级数学学科期中考试卷参考答案一选择题（本大题共6 题，每题 2 分，满分 12 分）1（B）；2（D）；3（C）；4（B）；5.（C）；6.（A）.二、填空题：（本大题共 12 题，每题 3 分，满分 36 分）73 3；813x；94 yx；10.1a；11.32x；1210 x，21x；13(23)(23)xx；1414m；151；16ACBDFE（或ABDE

28、等）；17 如果两个三角形是全等三角形，那么这两个三角形的面积相等；1840.三、解答题（本大题共7 题，满分 52 分）19（本题满分6 分）解：原式=(32)(21)（2分+2 分）=121（1 分）=2.（1 分）20（本题满分6 分）解：1,5,3abc224(5)4 1 313bac（2 分）24(5)1351322 12bbacxa（2 分）原方程的根是：12513513,22xx（2 分）21（本题满分6 分）解：21232xx（1 分）23124xx（1分）22233132444xx（1 分）235416x3544x，354x（2 分）精品资料-欢迎下载-欢迎下载名师归纳-第

29、 5 页，共 7 页 -文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T

30、3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2

31、文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:C

32、F6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4

33、U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 H

34、N8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G1

35、0H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2第 6 页FEDCBA 原方程的根是：123535,44xx（1 分）22（本题满分6 分）证明：ACCD，BDCD.AC/BD（1 分）A=B

36、（1 分）又点 E 是 AB 的中点，AE=BE （1分）又 AEC=BEF （1 分）AECBEF（1 分）CE=FE.（1 分）【说明：其他解法，酌情给分】23（本题满分8 分）解：设BCx米，则(1802)CDx米（1 分）由题意，得：(1802)4000 xx（3 分）整理，得：29020000 xx解得：40 x或5040 x（不符合题意，舍去）（2 分）1802180240100120 x（符合题意）（1 分）答：40BC米，100CD米（1 分）24（本题满分10 分）解：（1）2a，3b；（2 分+2 分）（2）由(22)(12)5ab，得：22250aabb.（1分）()

37、2(25)0abab.（1 分）由题意，得：0250abab，（2 分）解得：5353ab.（1 分）A F E D B C 精品资料-欢迎下载-欢迎下载名师归纳-第 6 页，共 7 页 -文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T

38、3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2

39、文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:C

40、F6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4

41、U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 H

42、N8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G1

43、0H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6

44、ZX2K2T3R10V2第 7 页EDCBA55522()333ab.（1 分）25（本题满分10 分）证明：（1）AB/CD，BAC=DCA .（1 分）又 B=ADC，AC=CA，ABC CDA.（1分）BC=AD，AB=DC，ACB=CAD.（1 分）又 AE=DC，AB=DC，AB=AE.（1 分）B=AEB.又 ACB=CAD，AD/BC，AEB=EAD.B=EAD.（1 分）在 ABC 与 EAD 中，ABCEAD.（1分）【说明：其他解法，酌情给分】（2）过点 A 作 AHBC 于 H.（1 分）AB=AE，AHBC.BAE=2BAH.（1 分）在 ABC 中，BAC+B+ACB

45、=180，又 ABAC，BAC=90.B+ACB=90.同理：B+BAH=90.BAH=ACB.（1 分）BAE=2ACB.（1 分）AB=AE，B=EAD，BC=AD.EDCBAH 精品资料-欢迎下载-欢迎下载名师归纳-第 7 页，共 7 页 -文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF

46、6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U

47、9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN

48、8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10

49、H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 Z

50、X2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3R10V2文档编码:CF6G5N4U9P3 HN8F2G10H5L6 ZX2K2T3

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