Question

determinati numerele intregi n pentru care:
a) n^7:n^3=(-5)^4
b) (n^7)^3=(-5)^21
c) (n^9)^5=[(-7)^15]^3
URGENT!!!!!!!!!!!!!!!DAU CORONITA!!!!!!!!!!!!!!!!!!!si 30de puncte!!!!!!!!!repede va rog!!!!!!!!!!!!!

Answer 1

a) n^7:n^3= n^4 = (-5)^4    = > n = -5

b) (n^7)^3= n ^21 = (-5)^21   = > n  = -5 

c) (n^9)^5 = [(-7)^15]^3 
     n^45 = (-7)^45     = > n = - 7