Repede va rog !!! dau coroana
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[tex]\it f:\mathbb{Q}_+\ \longrightarrow \mathbb{Q}_+\ ,\ f(x)=\dfrac{3}{25}x\\ \\ \\ f(100)=12 \Rightarrow sm\hat ant\hat ana\ reprezint\breve a\ 12\%\ din\ cantitatea\ de\ lapte[/tex]