I 4 - v I < 5I f(v) I < a f(v) < a and f(v) > - a4 - v < 5 and 4 - v > -54 - v < 5v > 4 - 5v > - 14 - v > -5v < 5 + 4v < 9Combine the rangers-1 < v < 9image attachedhope this helps!