已知x^2=5,y^n=3,求(xy)^3n

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已知x^2=5,y^n=3,求(xy)^3n
已知x^2=5,y^n=3,求(xy)^3n

已知x^2=5,y^n=3,求(xy)^3n
(xy)^3n
=x^3n * y^3n
=(x^2)^(3n/2)*(y^n)^3
=5^(3n/2)*3^3
=27* 5^(3n/2)

(xy)^（3n）
=x^（3n） * y^（3n）
=(x^2)^(3n/2)*(y^n)^3
=5^(3n/2)*3^3
=27* 5^(3n/2)

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