Use a graphing tool, such as Desmos graphing calculator, to determine the left- and right-hand limits of f (x) as a approaches 1. If f (x) has a limit as a approaches 1, state it. f (ac ) = 1xx] - 4, if x * 1 if x = 1 If the limit does not exist, enter DNE. lim f (x) = Pi lim f (x) = lim f (x) =