Test Academy | If f: R → R such that f(x) = 3x – 4 then which of the following is f-1(x)? 1/3 (x + 4), 1/3 (x - 4), 3x

Question

If f: R → R such that f(x) = 3x – 4 then which of the following is f-1(x)?

Options :