已知x^n=5,y^3,求(xy)^2n和(x^2y^3)^n的值

问题描述:

已知x^n=5,y^3,求(xy)^2n和(x^2y^3)^n的值

回答即可得2分经验值,还可=x^2n*y^2n
=(x^n)^2*(y^n)^2
=5^2*3^2
=25*9
=225
(x^2y^3)^n
=x^2n*y^3n
==(x^n)^2*(y^n)^3
=25*27
=6754|评论
以得到广大网友的赞同

(xy)^2n
=x^2n*y^2n
=(x^n)^2*(y^n)^2
=5^2*3^2
=25*9
=225
(x^2y^3)^n
=x^2n*y^3n
==(x^n)^2*(y^n)^3
=25*27
=675