Question

x ^-1 multiply x y^ -1where X=2/5 Y =3/7​

Answer 1

${x}^{ - 1} \times xy ^{ - 1} \\ = (\frac{2}{5} ) ^{ - 1} \times ( \frac{2}{5} )( \frac{3}{7})^{ - 1} \\ = \frac{5}{2} \times \frac{2}{5} \times \frac{7}{3} \\ = \frac{7}{3}$