Question

simplificando o radical
$\sqrt{7 {}^{8} }$
encontramos :

a)
$\sqrt{7 {}^{4} }$
b)
$\sqrt[4]{7 {}^{2} }$
c)
$\sqrt[4]{7}$
d)
${7}^{4}$
?

Answer 1

$\sqrt{ {7}^{8} } = {7}^{ \frac{8}{2} } \\ = {7}^{4}$