Respuesta :

Leader
[tex](7.57)^{-4}\times (7.57)^4 =(7.57)^{-4+4} =(7.57)^0 = \boxed{\bf{1}}[/tex]

[tex](5.25)^{-4}\times (5.25)^4 =(5.25)^{-4+4} =(5.25)^0 = \boxed{\bf{1}}[/tex]