Real Functions: Limits and IPE

This lecture delves into real functions, focusing on limits at a point and introducing the concept of Infinitely Small Equivalents (IPE). The instructor covers the definition of limits at infinity, explores the behavior of functions as they approach infinity, and provides examples to illustrate the concept. The lecture also discusses the notion of equivalence between functions and how it can be used to simplify calculations and approximate trigonometric functions with polynomials.