“…In 1938, A. M. Ostrowski proved an interesting integral inequality, estimating the absolute value of the derivative of a differentiable function by its integral mean as follows: Theorem 1.1. [6] Letf : I → R, I is an interval in R, be a differentiable function in I o , the interior of I and µ, ν ∈ I o , µ < ν. If |f (u)| ≤ M for all u ∈ [µ, ν], then…”