Question

If f(x) = (x - 3)/(3), then what is f–1(x) ?

1/3x – 1

3x – 1

3x – 3

3x + 3

Answer 1

replace y for x.

y = (x - 3)/3 ---> replace to --> x = (y - 3)/3

turn back y in to a function of x [ f(x) ].

f^(-1)(x) = 3x + 3

Answer 2

Thanks(:!