beserta pembahasannya

[tex] {( \frac{3 {x}^{ - 1} {y}^{3} }{2 {x}^{ - 2} y {}^{ - 4} } })^{ - 1} = \frac{ {3}^{ - 1} x {y}^{3} }{ {2}^{ - 1} {x}^{2} y {}^{4} } = \frac{2}{3xy} [/tex]