fx x1x2Solutionfx x1x2 y x1x2 xy 2y x1 x1y 2y1 x 2y11y

Solution

f(x)= (x+1)/(x+2)

y = (x+1)/(x+2)

xy + 2y = x+1

x(1-y) = 2y-1

x = (2y-1)/(1-y)

f^-1(x) = (2x-1) /(1-x)