Question

Calcule o valor de (3 elevado a -1 + 3 elevado a -2 sobre 3 elevado a -1 - 3 elevado a -2)²

Answer 1

$( \frac{3^{-1} + 3^{-2}}{ 3^{-1}- 3^{-2} } )^{2} => (\frac{ \frac{1}{3}+ \frac{1}{9} }{ \frac{1}{3}- \frac{1}{9} } ) ^{2} =>( \frac{ \frac{3+1}{9} }{ \frac{3-1}{9} }) ^{2} => (\frac{4}{9} . \frac{9}{2}) ^{2} =>( \frac{36}{18} )^{2}=>(2)^{2}=>4$

Resposta 4! Valeu ;)