Question

Fie proportiile :
b supra 3 = 2 supra a si 2 supra a = 3 supra a+c . Calculati bc.

Va rog ajutatima !!

Answer 1

$\frac{b}{3} = \frac{2}{a } =\ \textgreater \ ab=6$

$\frac{2}{a }= \frac{3}{a+c} =\ \textgreater \ \frac{3}{a+c}= \frac{b}{3}$

$\frac{3}{a+c}= \frac{b}{3} =\ \textgreater \ ab +bc = 9$

6 + bc= 9

bc= 9-6

bc = 3