Adriena’s strategy for checking that the functions f(x) and g(x) are inverses is to think of them as stacked function machines. she starts by choosing an input to drop into f(x). then she drops the output from f(x) into g(x). if she gets her original number, she is pretty sure that the two equations are inverses. question: is adriena’s strategy sufficient? is there anything else she should test to be sure?