Question

Quanto e
${81}^{0.25}$

Answer 1

Olá ! 

sabemos que 0,25 = 1/4 

Então temos ... 

$81^{0,25}\\\\\\=81^{ \frac{1}{4} }\\\\\\= \sqrt[4]{81} \\\\\\=\boxed{\boxed{3}}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ ok$

Answer 2

Ola!
$0,25= \frac{1}{4}$

$81^{0,25}$
=$81^{ \frac{1}{4} }$
=$\sqrt[4]{81}$
=$\sqrt[4]{3^{4} }$
$=3$