Question 45521
f(x) = x-2/x+2
y=(x-2)/(x+2)
Interchange x and y to get:
x=(y-2)/(y+2)
Solve for y as follows:
x(y+2)=y-2
xy+2x = y-2
y-xy=2x+2
y(1-x)=2x+2
y= (2x+2)/(1-x), x not equal to 1

This is the inverse.

cheers,
Stan H.