n次方根与分数指数幂同步练习一、选择题1.若2m⋅4n=16,则必有（）A.mn=4B.mn=2C.m+2n=2D.m+2n=42.5√a5+4√¿¿的化简结果为（）A.1−aB.3a−1C.1−a或3a−1D.a−1或1−3a3.当x>0时,若√√x3=3x,则x=¿¿A.927B.327C.925D.3254.若{1,a,ba}={0,a2,a+b},则a2012+b2012的值为¿¿A.0B.1C.−1D.1或−15.若10a=5,10b=2,则a+b=¿¿A.−1B.0C.1D.26.已知am=4,an=3,则√am−2n的值为（）A.23B.6C.32D.27.化简√3√ab2⋅a3b23√b⋅(a16b1...
