Respuesta :

vladdobra
When something is put to the negative power, this transformation happens:  
  
[tex]x^-y = \frac{1}{x^y} [/tex]  
  
Now, apply this to your question;  
  
[tex](xy)^-3 = \frac{1}{(xy)^3} [/tex]  
  
Simplify the expression:  
  
[tex] \frac{1}{x^3 y^3} [/tex]  

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