Expression 5: "f" Subscript, "R" , Baseline left parenthesis, "x" , "y" , right parenthesis equals left parenthesis, StartFraction, 2 "x" Over left parenthesis, 1 plus "y" , right parenthesis squared plus "x" squared , EndFraction , StartFraction, "x" squared plus "y" squared minus 1 Over left parenthesis, 1 plus "y" , right parenthesis squared plus "x" squared , EndFraction , right parenthesisfRx,y=2x1+y2+x2,x2+y2−11+y2+x2
5
Which transformation to use; 0 for real, 1 for complex: