R−2,R−{0},f−1(x)=2x+1x−2R-2, R-\{0\}, f^{-1}(x)=\frac{2 x+1}{x-2}R−2,R−{0},f−1(x)=x−22x+1
R−{2},R−{2},f−1(x)=2x−1x−2R-\{2\}, R-\{2\}, f^{-1}(x)=\frac{2 x-1}{x-2}R−{2},R−{2},f−1(x)=x−22x−1
R,R,f−1(x)=x−22x+2R, R, f^{-1}(x)=\frac{x-2}{2 x+2}R,R,f−1(x)=2x+2x−2
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