Question

HELPPPPPPPPPPPPPPPPPPPPPP

Answer 1

[x^(-1/3)]^2=[a^(-3)]^2
⇒ x^(-1/3)=a^(-3)

[y^1/3]^2=[b^3]^2
A^2=B^2 ⇒ A=B so 
⇒ y^(1/3)=b^3

x^ (-1/3)*y^(-1/3)=x^(-1/3)/y^1/3=a^(-3)/b^3=a^(-3)*b^(-3)

cause b^(-3)=1/b^3 is the definition of negative power

the answer is b