jawaban sama jalannya

Jawabannya A. [tex] x^{2} y^{-9} [/tex]

[tex] \frac{ (xy^{3}) ^{-1} }{( x^{-1} y^{2} ) ^{3} } = \frac{ x^{-1} y^{-3} }{ x^{-3} y^{6} } = x^{-1-(-3)} y^{-3-6} = x^{2} y^{-9} [/tex]