Question

cat e unu supra doi la minus unu?

Answer 1

$\left(\dfrac{a}{b}\right)^{-1} = \dfrac{b}{a}\ \qquad \ \left(\dfrac{1}{2}\right)^{-1} = \dfrac{2}{1} =2$

Answer 2

Cand ai o frctie la putere negativa se inverseaza numarul si puterea devine pozitiva.
$( \frac{1}{2} )^{-1}= ( \frac{2}{1} )^{1}= \frac{2}{1}=2$
sper ca te-am ajutat ;)