Question

Problema din imagine.va rog.​

Answer 1

$\it \dfrac{a}{b}=5\ \ \ \ \ (*)\\ \\ \\ a)\ \ \dfrac{3a}{b}=3\cdot\dfrac{a}{b}\stackrel{(*)}{=}\ 3\cdot5=15\\ \\ \\ b)\ \dfrac{\dfrac{a}{2}}{14b}=\dfrac{a}{2\cdot14b}=\dfrac{1}{28}\cdot\dfrac{a}{b}\ \stackrel{(*)}{=}\ \dfrac{1}{28}\cdot5=\dfrac{5}{28}$

Answer 2

Răspuns:

Explicație pas cu pas: