幂运算练习6题
问题描述:
幂运算练习6题
1.计算6m^3/(-3m^2)的结果是( )
A.-3m B.-2m C.2m D.3m
2.下列各式中计算结果等于2x^6的是( )
A.x^3+x^3 B.(2x^3)^2 C.2x^3`x^2 D.2x^7/x
3.计算:(-3a^3)^3/a^2=
4.指数方程:16^2-x =8^x+5 中的x=
5.已知a^m =2,a^n =3,a^p =5,则a^2m-3n+p =
6.计算:(a-b)^12/(b-a)^5/(a-b)^5 =
答
1.B
2.D
3.-27a^7
4.x=-1
5.a^m =2 则a^2m =4a^n =3则a^-3n =1/27a^p =5
则a^2m-3n+p =20/27
6.-(a-b)^2