Question

Tick (✓) the correct answer
${\left(\frac{-5}{3}\right)}^{-1}=?$
(a) $\frac{5}{3}$
(b) $\frac{3}{5}$
(c) $\frac{-3}{5}$
(d) none of these

Answer 1

(c) $\frac{-3}{5}$

${\left(\frac{-5}{3}\right)}^{-1}={\left(\frac{3}{-5}\right)}^1=\frac{3}{-5}=\frac{3\times \left(-1\right)}{-5\times \left(-1\right)}=\frac{-3}{5}$