ПОМОГИТЕ! какие из пропорций верны?
1) 3:2 = [tex]\frac{1}{4}[/tex] : [tex]\frac{1}{6}[/tex]
2) [tex]\frac{1}{13}[/tex] : [tex]\frac{1}{5}[/tex] = 13:5
3) [tex]\frac{3,2}{\frac{1}{3}}[/tex] : [tex]\frac{6}{0,625}[/tex]
какие из них верны?
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