Question

Sendo log b x= 5 e log b y=-2, qual é o valor de log b(x2
.y)?

Answer 1

Propriedades

• $\log_ab^n=n\log_ab$

• $\log_ab.c=\log_ab+\log_ac$

$\log_b(x^2.y)=\log_bx^2+\log_by=2\log_bx+\log_by\\\\2\log_bx+\log_by\\\\2.5+(-2)\\\\10-2=8$