Question

aplique as propriedades da potência e determine a expressão numérica
$5 {}^{7} . {5}^{ - 3} \div {2}^{ - 2}$

Answer 1

$5^7.5^{-3}\div 2^{-2}\\\\ 5^4\div 2^{-2}\\\\ \displaystyle 5^4\times \frac{1}{2^2}\\\\ (5.5.5.5)\times \frac{1}{4}\\\\ (25.25)\times \frac{1}{4}\\\\ 625\times \frac{1}{4}\\\\ \bf \frac{625}{4}$