二次根式基础练习
题
快递公司问题件快递公司问题件货款处理关于圆的周长面积重点题型关于解方程组的题及答案关于南海问题
(重视考点训练,附参考答案)班级姓名__________分数__________一、选择题(每小题3分,共30分)1.若为二次根式,则m的取值为()A.m≤3B.m<3C.m≥3D.m>32.下列式子中二次根式的个数有()⑴;⑵;⑶;⑷;⑸;⑹;⑺.A.2个B.3个C.4个D.5个3.当有意义时,a的取值范围是()A.a≥2B.a>2C.a≠2D.a≠-24.下列计算正确的是()①;②;③;④;A.1个B.2个C.3个D.4个5.化简二次根式得()A.B.C.D.306.对于二次根式,以下说法不正确的是()A.它是一个正数B.是一个无理数C.是最简二次根式D.它的最小值是37.把分母有理化后得()A.B.C.D.8.的有理化因式是()A.B.C.D.9.下列二次根式中,最简二次根式是()A.B.C.D.10.计算:等于()A.B.C.D.二、填空题(每小题3分,共分)11.当x___________时,是二次根式.12.当x___________时,在实数范围内有意义.13.比较大小:______.14.____________;__________.15.计算:___________.16.计算:=_________________.17.当a=时,则___________.18.若成立,则x满足_____________________.三、解答题(46分)19.(8分)把下列各式写成平方差的形式,再分解因式:⑴;⑵;⑶;⑷.20.(12分)计算:⑴;⑵;⑶;⑷.21.(12分)计算:⑴;⑵;⑶;⑷.22.(8分)把下列各式化成最简二次根式:⑴;⑵.23.(6分)已知:,求的值.参考答案:一、选择题1.A;2.C;3.B;4.A;5.B;6.B;7.D;8.C;9.D;10.A.二、填空题11.≤;12.≤;13.<;14.,7;15.;16.;17.;18.2≤x<3.三、解答题19.⑴;⑵;⑶;⑷;20.⑴;⑵2;⑶;⑷;21.⑴;⑵;⑶1;⑷;22.⑴;⑵;23.18._1234567921.unknown_1234567937.unknown_1234567953.unknown_1234567961.unknown_1234567965.unknown_1234567967.unknown_1234567969.unknown_1234567970.unknown_1234567971.unknown_1234567968.unknown_1234567966.unknown_1234567963.unknown_1234567964.unknown_1234567962.unknown_1234567957.unknown_1234567959.unknown_1234567960.unknown_1234567958.unknown_1234567955.unknown_1234567956.unknown_1234567954.unknown_1234567945.unknown_1234567949.unknown_1234567951.unknown_1234567952.unknown_1234567950.unknown_1234567947.unknown_1234567948.unknown_1234567946.unknown_1234567941.unknown_1234567943.unknown_1234567944.unknown_1234567942.unknown_1234567939.unknown_1234567940.unknown_1234567938.unknown_1234567929.unknown_1234567933.unknown_1234567935.unknown_1234567936.unknown_1234567934.unknown_1234567931.unknown_1234567932.unknown_1234567930.unknown_1234567925.unknown_1234567927.unknown_1234567928.unknown_1234567926.unknown_1234567923.unknown_1234567924.unknown_1234567922.unknown_1234567905.unknown_1234567913.unknown_1234567917.unknown_1234567919.unknown_1234567920.unknown_1234567918.unknown_1234567915.unknown_1234567916.unknown_1234567914.unknown_1234567909.unknown_1234567911.unknown_1234567912.unknown_1234567910.unknown_1234567907.unknown_1234567908.unknown_1234567906.unknown_1234567897.unknown_1234567901.unknown_1234567903.unknown_1234567904.unknown_1234567902.unknown_1234567899.unknown_1234567900.unknown_1234567898.unknown_1234567893.unknown_1234567895.unknown_1234567896.unknown_1234567894.unknown_1234567891.unknown_1234567892.unknown_1234567890.unknown