Ответ:

[tex]24 {}^{ \frac{1}{3} } \times \sqrt[3]{21 \dfrac{1}{3} } = \sqrt[3]{24} \times \sqrt[3]{ \dfrac{64}{3} } = \sqrt[3]{24 \times \dfrac{64}{3} } = \sqrt[3]{8 \times 64} = 2 \times 4 = 8.[/tex]

[tex]36 {}^{ \frac{1}{4} } \times \sqrt[4]{2 \dfrac{1}{4} } = \sqrt[4]{36} \times \sqrt[4]{ \dfrac{9}{4} } = \sqrt[4]{36 \times \dfrac{9}{4} } = \sqrt[4]{9 \times 9} = \sqrt[4]{81} = 3.[/tex]