Question

tou com duvida (-1/9)Elevado a -2

Answer 1

Resposta: 81.

Explicação passo-a-passo:

$\mathtt{\left(\dfrac{-1}{9}\right)^{-2}=\left(\dfrac{9}{-1}\right)^2=\dfrac{9^2}{(-1)^2}=\dfrac{81}{1}=1}$