Resposta:
[tex] \frac{a + b}{ab} \\ \bf \: \: para \: \: a = \frac{1}{3} \: \: e \: \: b = \frac{2}{5} \\ \dfrac{ \frac{1}{3} + \frac{2}{5} }{ \frac{1}{3} \times \frac{2}{5} } \\ \frac{1}{3} + \frac{2}{5} = \frac{5 + 6}{15} = \frac{11}{15} [/tex]
[tex] \frac{1}{3} \times \frac{2}{5} = \frac{2}{15} \\ \frac{ \frac{11}{15} }{ \frac{2}{15} } = \frac{11}{15} \div \frac{2}{15 } = \frac{11}{15} \times \frac{15}{2} = \frac{11}{2} [/tex]
Espero ter ajudado!
Att Silver Sword✔
