Question

Calcule , pela definiçao : ( Conta armada , se puder )

a) log_{x} 27=3
b) log_{4} x=5

Answer 1

.
$a)~~~\log_x27=3 \\ \\ x^3=27 \\ \\ x= \sqrt[3]{27} \\ \\ x= \sqrt[3]{3^3} \\ \\ x=3 \\ \\ b)~~~\log_4x=5 \\ \\ 4^5=x \\ \\ x=1024$