Question

Alguém me ajuda, é pra entregar hoje!​

Answer 1

Resposta:

Olá bom dia!

Nas equações exponenciais as bases devem ser as mesmas em ambos os membros. Daí, igualamos os expoentes.

$5^x =625\\\\5^x=25^2\\\\5^x = (5^2)^2\\\\5^x = 5^4\\\\x = 4\\\\\\\\3^x = 729\\\\3^x = 27^2\\\\3^x = (3^3)^2\\\\3^x = 3^6\\\\x = 6\\\\\\\\\\8^x = 256\\\\(2^3)^x = 256\\\\2^{3x} = 16^2\\\\2^{3x} = (2^4)^2\\\\2^{3x} = 2^{8}\\\\3x = 8\\\\x = \frac{8}{3}$

Explicação passo a passo: