Răspuns:
Explicație pas cu pas:
[tex] \boxed{2.} \: [(1.3)^{3}]^{2} \div {1.3}^{4} + 3 \cdot( \frac{15}{6} + \frac{7}{4} ) \cdot2.5 = \\ \: \: \: \: \: \: \: 1.3^{3 \times 2} \div {1.3}^{4} + 3 \cdot(2.5 + 1.75) \cdot2.5 = \\ \: \: \: \: \: \: \: {1.3}^{6} \div {1.3}^{4} + 3 \cdot4.25 \div 2.5 = \\ \: \: \: \: \: \: \: {1.3}^{6 - 4} + 12.75 \div 2.5 = \\ \: \: \: \: \: \: \: {1.3}^{2} + 5.1 = \\ \: \: \: \: \: \: \: 1.69 + 5.1 = \boxed{6.79}[/tex]
