Пошаговое объяснение:

[tex]1) {2}^{1.3} \div {2}^{ - 0.7} \times {2}^{1.4} = {2}^{1.3 - 0.7 + 1.4} = {2}^{2} = 4[/tex]

[tex]2)3 \times {9}^{0.4} \sqrt[5]{3} = 3 \times ( {3}^{2} {)}^{0.4} \times {3}^{ \frac{1}{5} } = 3 \times {3}^{0.8} \times {3}^{0.2} = {3}^{2} = 9[/tex]