已知x=-5,y=1/5,求x2*x2n*(yn)2的值.

已知x=-5,y=1/5,求x2*x2n*(yn)2的值.
已知x=-5,y=1/5,求x2*x2n*(yn)2的值.

已知x=-5,y=1/5,求x2*x2n*(yn)2的值.
x^2*x^2n*(yn)2
=x^2*x^2n*y^2n
=x^2*(x*y)^2n
=5^2*(5*1/5)^2n
=25*1
=25