If \(\rm y = \dfrac{x+1}{x-1}\), then what is \(\rm \dfrac{dy}{dx}\) equal to?

1
\(\rm \dfrac{-2}{x-1}\)
2
\(\rm \dfrac{-2}{(x-1)^2}\)
3
\(\rm \dfrac{2}{(x-1)^2}\)
4
\(\rm \dfrac{2}{(x-1)}\)

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