Question

Efectuați: a) $\frac{3}{xy}$ + $\frac{10}{xy}$
b) $\frac{a}{a-b}$+$\frac{b}{a-b}$
Ajutatima va rog dau coroana

Answer 1

$\frac{3}{xy} + \frac{10}{xy} = \frac{3+10}{xy} = \frac{13}{xy}$
$\frac{a}{a-b} + \frac{b}{a-b} = \frac{a+b}{a-b}$