Question

equação exponelcial (2/5)^x-1 = 125/8

Answer 1

(2/5)^x-1 = (8/125)^-1

(2/5)^x-1 = (2³/5³)^-1

(2/5)^x-1 = (2/5)^-3

Corta (2/5) c/ ele mesmo

x-1=-3

X= -3 + 1

X= -2