Definite integrals represent the summation of infinitely small quantities. Using them, you can calculate areas of irregular regions and many other useful things.

In my lectures, I present the theory of definite integrals slowly and step by step, making this challenging topic easier to understand.

Lecture 1 – Definite Integrals – definition
Lecture 2 – Integrability of any continuous function
Lecture 3 – Darboux Sums – Helpful Integral Sums