Question

exponenciais ajuda
2 187^x = 3
(1/4)^2x = 16
(5/125)^x = 625

Answer 1

Boa noite Larin

a)

2187^x = 3
2187^(1/7) = 3
x = 1/7

b)

(1/4)^2x = 16
2^(-4x) = 2^4 
-4x = 4
x = -1

c)

(5/125)^x = 625 
(1/25)^x = 25^2
25^-x = 25^2
x = -2