1. The problem statement, all variables and given/known data Consider a bijection f = (A,B,F) Show that f^(-1) (inverse of f) is a bijection from B to A and that for any element x of A we have f^(-1)(f(x))=x 3. The attempt at a solution For this proof can I use contradiction and the say f^(-1) is not a bijection from B to A or there exists an element x of A that f^(-1)(f(x)) != x If this is what I am supposed to prove. How would I go about doing it? If not what proof method should I use?