Md. Mizanur Rahaman presented on the Mean Value Theorem of differential calculus. Some key points: 1) The Mean Value Theorem states that if a function f is continuous on the closed interval [a,b] and differentiable on the open interval (a,b), then there exists a number c in (a,b) such that the slope of the tangent line at (c,f(c)) equals the slope of the secant line between (a,f(a)) and (b,f(b)). 2) A restricted form of the theorem was proved by Rolle in 1691 for polynomials, while the modern form was stated and proved by Cauchy in 18