Question

Calcular os logaritmos:

a) log 1/4
2

e

Answer 1

log 1/4 a=2
log 1/4¹=2x
log 4-¹=2x
log 2²-¹=2x 
log 1=x

Answer 2

log 1/4 = 2^x

2^-2 = 2^x

temos que x = -2