Question

Calcule as expressões: 3-²

Answer 1

→ Cálculo :

${\huge \boxed{\begin{array}{lr} {3^{-2} = \ \ \ \ \ \ \ \ } \\ \\{\frac{1}{3^{2} } =}\\\\{\frac{1}{3\times3}= }\\\\\boxed{\red{ \ \ \frac{1}{9} \ \ }} \\ \end{array}}}$