2n-1 n-1 definite integral as the limit of a sum (integration by first principle rule) let f(x) be a single valued continuous function in the interval (a, b), (

2n-1 n-1 Definite Integral as the limit of a sum (Integration by First Principle Rule) Let f(x) be a single valued continuous function in the interval (a, b), (a < b) and b) be divided inton equal parts, each of width h, we have