question_answer 42)

If  be given by       f(x) = (3 ? x3)1/3, (fof) (x) is       (a) x1/3                                 (b) x3             (c) x                                    (d) (3 ? x3)  

Answer:

(fof) (x) = f(f(x)) = f((3 ? x3)1/3)                        is correct.