Question

o valor da expressão (3-¹+2-¹)-¹•2-½

Answer 1

$(3^{-1}+2^{-1})^{-1}.2^{- \frac{1}{2} } \\ desenvolvendo \ as \ potencias\\ ( \frac{1}{3} + \frac{1}{2})( \frac{1}{2})^{ \frac{1}{2} } \\ (\frac{2+3}{6} )( \frac{1}{ \sqrt{2} })\\ \frac{5}{6} . \frac{ \sqrt{2} }{2} = \frac{5 \sqrt{2} }{12}$