幂的乘方与积的乘方
问题描述：
幂的乘方与积的乘方
1.(xy^4)^m(^是乘方的意思)
2.-(p^2q)^n
3.(xy^3n)^2+(xy^6)^n
4.(-3x^3)^2-[(2x)^2]^3
答
乘方的乘方：幂直接相乘
(xy^4)^m=(x^4)(y^4m)
-(p^2q)^n =-(p^2n)(q^n)
(xy^3n)^2+(xy^6)^n =(x^2)(y^6n)+(x^n)(y^6n)
(-3x^3)^2-[(2x)^2]^3=9x^6-(4x^2)^3=9x^6-64x^6=-55x^6