Zbiór liczb rzeczywistych i jego podzbiory...   Oblicz: [latex]sqrt[3]{frac{1}{27}}[/latex] [latex]sqrt[3]{1frac{61}{64}}[/latex] [latex]sqrt[3]{-frac{1728}{125}}[/latex] [latex]sqrt[3]{-1}[/latex]

[latex]sqrt[3]{frac{1}{27}}= sqrt[3]{frac{1^3}{3^3}} = frac{1}{3}[/latex]   [latex]sqrt[3]{1frac{61}{64}}= sqrt[3]{frac{125}{4^3}}=sqrt[3]{frac{5^3}{4^3}} = frac{5}{4}[/latex] [latex]sqrt[3]{frac{-1728}{125}}= sqrt[3]{frac{(-12)^3}{5^3}} = frac{-12}{5}[/latex]   ostatnie to[latex]sqrt[3]{-1}= sqrt[3]{(-1)^3} = -1[/latex]

[latex]sqrt[3]{frac{1}{27}} = frac{1}{3} [/latex]     [latex]sqrt[3]1frac{61}{64}} = 0,98[/latex]     [latex]sqrt[3]-frac{1729}{125}} = -frac{12}{5}[/latex]     [latex]sqrt[3]{-1}[/latex] = -1