Răspuns
Bună,
[tex] \frac{a}{b} = \frac{2}{3} = > 3a = 2b = > b = \frac{3a}{2} \\ \frac{b}{c} = \frac{3}{4} => 4b = 3c = > 4 \times \frac{3a}{2} = 3c = > \\ 6a = 3c = > c = 2a \\ \frac{c}{d} = \frac{4}{5} = > 5c = 4d = > 10a = 4d = > \\ d = \frac{5a}{2} \\ \frac{d}{a} = \frac{ \frac{5a}{2} }{a} = > \frac{5a}{2} \times \frac{1}{a} = \frac{5}{2} [/tex]
[tex]C) \frac{5}{2} [/tex]
Sper că te-am ajutat.
