江苏省宿迁市泗洪县2018届中考数学专题复习第一章数与式(第4课时)练习(无答案).doc

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1、1数的开方与二次根式一、选择题12016贵港 式子 在实数范围内有意义,则 x 的取值范围是( )1x 1Ax1 Bx1 Cx1 Dx122017泰州2 的算术平方根是( )A B. C D22 2 232017聊城64 的立方根是( )A4 B8 C4 D84 2017连云港关于 的叙述正确的是( )8A在数轴上不存在表示 的点8B. 8 2 6C. 2 8 2D与 最接近的整数是 3852017益阳下列各式化简后的结果为 3 的是( )2A. B. C. D.6 12 18 3662017重庆A 估计 1 的值应在( )10A3 和 4 之间 B4 和 5 之间 C5 和 6 之间 D6

2、和 7 之间72016钦州 下列运算正确的是( )Aaa2a Ba 6a3a 2C. D(ab) 2a 2b 28 2 1082017凉山 州有一个数值转换器,原理如图 K41,当输入的 x 为 64 时,输出的 y 是( )图 K41A2 B 3 C2 D82 2 3二、填空题29(1)2016宁波实数27 的 立方根是_;(2)2015北海9 的算术平方根是_102016玉林 要使代数式 有意义,则 x 的最大值是_1 2x112016德州化简 的结果是_33122017山西计算:4 9 _18 2三、 解答题13(1)2017南京改编计算: .12 8 6(2)2017贵港 先化简,再求

3、值:( ) ,其中 a2 .1a 1 1a 1 4 2aa2 1 2142017枣庄实数 a,b 在数轴上对应的点的位置如图 K42 所示,化简|a|的结果是( )( a b) 2图 K42A2ab B2abCb Db15观察分析下列数据:0, , ,3,2 , ,3 ,根据数据3 6 3 15 2排列的规律得到第 16 个数据应是_(结果需化简)162016 黄石观察下列等式:第 1 个等式:a 1 1,11 2 2第 2 个等式:a 2 ,12 3 3 2第 3 个等式:a 3 2 ,13 2 33第 4 个 等式:a 4 2,12 5 5按上述规律,回答以下问题:(1)请写出第 n 个等式:a n_;(2)a1a 2a 3a n_

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