《8年级上册第15章《分式》同步练习及答案(15.3)(2).pdf》由会员分享，可在线阅读，更多相关《8年级上册第15章《分式》同步练习及答案(15.3)(2).pdf（4页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、1 第 15 章分式同步练习（15.3 分式方程）班级学号姓名得分一、选择题1方程132xx的解为()(A)2(B)1(C)2(D)1 2解分式方程12112xx，可得结果()(A)x1(B)x1(C)x3(D)无解3要使54xx的值和xx424的值互为倒数，则x 的值为()(A)0(B)1(C)21(D)1 4已知4321yyxx，若用含x的代数式表示y，则以下结果正确的是()(A)310 xy(B)yx2(C)310 xy(D)y 7x2 5若关于 x 的方程xkx1113有增根，则k 的值为()(A)3(B)1(C)0(D)1 6若关于 x 的方程323xmxx有正数解，则()(A)m0
2、 且 m3(B)m6 且 m3(C)m0(D)m6 7完成某项工作，甲独做需a 小时，乙独做需b 小时，则两人合作完成这项工作的80，所需要的时间是()(A)(54ba小时(B)11(54ba小时(C)(54baab小时(D)baab小时8a 个人 b 天可做 c 个零件(设每人速度一样)，则 b 个人用同样速度做a 个零件所需天数是()(A)ca2(B)2ac(C)ac2(D)2ca二、填空题精品资料-欢迎下载-欢迎下载 名师归纳-第 1 页，共 4 页 -2 9x_时，两分式44x与13x的值相等10关于 x 的方程324bxa的解为 _11当 a_时，关于 x 的方程4532xaax的根
3、是 112若方程114112xxx有增根，则增根是_13关于 x 的方程11xa的解是负数，则a 的取值范围为 _14一艘轮船在静水中的最大航速为20 千米/时，它在江水中航行时，江水的流速为v 千米/时，则它以最大航速顺流航行s千米所需的时间是_三、解方程15.32121xxx161211422xxxxx17xxxxx25316四、列方程解应用题18甲工人工作效率是乙工人工作效率的212倍，他们同时加工1500 个零件，甲比乙提前18 个小时完工，问他们每人每小时各加工多少个零件?精品资料-欢迎下载-欢迎下载 名师归纳-第 2 页，共 4 页 -文档编码:CR3S4M2V1V5 HZ6T9D
4、7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编
5、码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D
6、7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编
7、码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D
8、7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编
9、码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D
10、7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C43 19甲、乙两地相距50km，A 骑自行车，B 乘汽车，同时从甲城出发去乙城已知汽车的速度是自行车速度的2.5 倍，B 中途休息了0.5 小时还比A 早到 2 小时，求自行车和汽车的速度20面对全球金融危机的挑战，我国政府毅然启动内需，改善民生国务院决定从2009 年2 月 1 日起，在全国范围内实施“家电下乡”，农民购买入选产品，政府按原价购买总额的13 给予补贴返还某村委会组织部分农民到商场购买入
11、选的同一型号的冰箱、电视机两种家电，已知购买冰箱的数量是电视机的2倍，且按原价购买冰箱总额为40000元、电视机总额为15000 元根据“家电下乡”优惠政策，每台冰箱补贴返还的金额比每台电视机补贴返还的金额多65 元，求冰箱、电视机各购买多少台?(1)设购买电视机x 台，依题意填充下列表格：项目家电种类购买数量/台原价购买总额/元政府补贴返还比例/补贴返还总金额/元每台补贴返还金额/元冰箱40000 13 电视机x15000 13(2)列出方程(组)并解答精品资料-欢迎下载-欢迎下载 名师归纳-第 3 页，共 4 页 -文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F
12、1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5
13、HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F
14、1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5
15、HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F
16、1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5
17、HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F
18、1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C44 参考答案1A2D3B4C5A.6B7C8A9x 810462bax11317a12x113a1 且 a01420vs小时15无解1621x17无解18设乙的工作效率为x 个/时，甲的工作效率为x25个/时182515001500 xx50 x经检验，x50 是原方程的根答：甲每小时加工125 个，乙每小时加工50 个19设自行车速度为x 千米/时，汽车速度为2.5x 千米/时xx502215.250 x12经检验 x12 是原
19、方程的根答：自行车的速度为12km/时，汽车的速度为30km/时20(1)2x，4000013，x2%1340000，1500013，x%1315000；(2)冰箱、电视机分别购买20 台、10 台精品资料-欢迎下载-欢迎下载 名师归纳-第 4 页，共 4 页 -文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3
20、S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9
21、 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3
22、S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9
23、 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3
24、S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4文档编码:CR3S4M2V1V5 HZ6T9D7S5I9 ZL3W4Y4F1C4