If f (x) = 3x, what is f^-1 (x) ?

Answer: f-1 (x) = x/3 + 5/3

Step-by-step explanation: The inverse function is found by replacing the independent variable with the dependent variable and vice versa like so

f (x) = 3x-5 becomes x = 3y-5; now we solve for y

3y = x + 5 or y = x/3 + 5/3

Therefore the inverse function becomes: f-1 (x) = x/3 + 5/3

Answer: - 1 (x) ] = x