If \( \dfrac{dy}{dx}+\dfrac{2^{\,x-y}\left(2^{y}-1\right)}{2^{x}-1}=0,\ x,y>0,\ y(1)=1 \), then \( y(2) \) is equal to:
\( 2+\log_{2}3 \)
\( 2+\log_{3}2 \)
\( 2-\log_{3}2 \)
\( 2-\log_{2}3 \)