Question

Resolver a seguinte expressão:
$2^{-1} + 6 . ( \frac{2}{3} )^{-2} - ( \frac{-1}{3} )^{-1}$

Answer 1

$2^{-1} + 6* (\frac{2}{3})^{-2} - (-\frac{1}{3})^{-1} \\ \\ ( \frac{1}{2})^{1} + 6* (\frac{3}{2})^{2} - (-3)^{1} \\ \\ \frac{1}{2} + 6* \frac{9}{4} - (-3) \\ \\ \frac{1}{2} + 6* \frac{9}{4} + 3 \\ \\ \frac{1}{2} + \frac{54}{4} + 3 \\ \\ \frac{2 + 54 + 12}{4} \\ \\ \frac{56 + 12}{4} \\ \\ \frac{68}{4} = 17$

 Abraços.