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

Va rog ajutatima !!


Răspuns :

[tex] \frac{b}{3} = \frac{2}{a } =\ \textgreater \ ab=6[/tex]

[tex]\frac{2}{a }= \frac{3}{a+c} =\ \textgreater \ \frac{3}{a+c}= \frac{b}{3} [/tex]

[tex]\frac{3}{a+c}= \frac{b}{3} =\ \textgreater \ ab +bc = 9[/tex]

6 + bc= 9

bc= 9-6

bc = 3