What is differential calculus? Differential calculus is mathematical analysis of change in systems and processes. |f(x)−f(a)−m∗(x−a)|≤K∗(x−a)2|f(x)-f(a)-m*(x-a)| \leq K*(x-a)^2 Leave a Reply Cancel replyComment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.