We wish to show that lim (4x + 5) = 13. If we give and find the value of to use, let = 0.04 to find. First, set |(4x + 5) - 13| < 0.04. Based on the absolute value, this means < 4x - 8 < and < 4x < and > x >. This means we set = {1: NM = 0.0i} (round to four decimal places). So for any such that |2| < , we know that |4 + 5 - 13| <.