Question

If f(x) = 2x, then f-1(x) =
1/2 х
x-2
-2x

Answer 1

1/2x

Explanation:

y = 2x

To find the inverse, exchange x and y

x = 2y

Solve for y

Divide each side by 2

x/2 = 2y/2

1/2x = y

The inverse is 1/2x