已知x=-5,y=5分之1,求x^2*x^2n*(y^n)^2

问题描述:

已知x=-5,y=5分之1,求x^2*x^2n*(y^n)^2

x^2*x^2n*(y^n)^2
=x^2*x^2n*y^2n
=x^2*(xy)^2n
=(-5)^2*(-1)^2n
=25