\(\rm \frac{x}{y}=\left(\frac{-1}{3}\right)^{-3}\div \left(\frac{2}{3}\right)^{-4}\) then what is the value of \(\rm \left(\frac{x}{y}+\frac{y}{x}\right)^{-1}\) ?

1
\(-\frac{48}{265}\)
2
\(-\frac{3}{16}\)
3
\(\frac{19}{48}\)
4
\(\frac{38}{73}\)

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