If ƒ(x) = 2x, then ƒ -1(x) =
½ x
x - 2
-2 x
I think that the answer is 1/2x...please check...thanks
I believe you want f^-1 (x), the inverse of f(x)
let y = 2x
to form the inverse we interchange the x and y
x = 2y
now solve this new equation for y
y = x/2 or (1/2)x