Răspuns :
a supra b=5 supra 7
a si b sunt direct proportionale cu 5 si 7.
a si b sunt direct proportionale cu 5 si 7.
a/b = 5/7⇒ a/5=b/7⇒ {a, b} d. p. {5, 7}
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[tex]\it\dfrac{a}{b}=\dfrac{5}{7} \\\;\\ \it Schimbam\ mezii\ intre\ ei\ : \\\;\\ \dfrac{\it a}{\it5}=\it\dfrac{b}{7} \Longrightarrow \{a, \ b\}\ d.\ p.\ \{5, \ 7\}[/tex]
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[tex]\it\dfrac{a}{b}=\dfrac{5}{7} \\\;\\ \it Schimbam\ mezii\ intre\ ei\ : \\\;\\ \dfrac{\it a}{\it5}=\it\dfrac{b}{7} \Longrightarrow \{a, \ b\}\ d.\ p.\ \{5, \ 7\}[/tex]