Question

resolva as equações exponenciais

Answer 1

Olá!

$\left(\dfrac{1}{5}\right)^x=125\\\\\left(\dfrac{1}{5}\right)^x=5^3\\\\\left(5^{-1}\right)^x=5^3\\\\5^{-x}=5^3\\\\\therefore\ -x=3\\\\\boxed{\boxed{x=-3}}\\\\\\S=\{-3\}$