Upper and Lower Integrals

[@shehanranasinghe9730]

You literally made me understand what is lower and upper intregal really is.thanks a lot

[@RealEverythingComputers]

Thanks for the great video -- was real refresher to some calc I content!

[@priy9491]

Had a difficult time understanding the concept before..thank you for this!

[@neeleshbulleeraz6338]

gold