Question

Me ajudem, urgente por favor!!!

Answer 1

Resposta:

$\frac{2^{-1}-(-2)^2+(\frac{2}{5})^{-1} }{2^2+2^{-2}} =\\\frac{0,5-4+2,5}{4+\frac{1}{4} } =\\\frac{-1}{\frac{16+1}{4} } =\\\frac{-4}{17}$