Find the inverse of the function f(x)= 3x-5 / x+4 ( they are like fraction on top of each other).
+37084 OK....that is what I suspected
y=(3x-5) / (x+4) change the 'y' for 'x' and the 'x's to 'y's then solve for 'y'
x = (3y-5)/(y+4) Multiply both sides by y+4
x(y+4) = 3y-5
xy + 4x = 3y- 5
4x+5 = 3y - xy
4x+5 = y(3-x)
(4x+5)/(3-x) = y = f^(-1)(x)
