Question

Calcule: (-3)-¹ + (-1) -³

Answer 1

$(-3)^{-1} + (-1 )^{-3}$

$( \frac{1}{-3} )^{1} +( \frac{1}{-1} ) ^{3}$

$- \frac{1}{3} +( -\frac{1}{1} )$

$- \frac{1}{3} - \frac{3}{3} =\boxed{- \frac{4}{3} }\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ ok$