#Adv_Calculus #upper_bound (u-1/n) is not upper bound but (u+1/n) is upper bound of S.URDU/HINDI

In this video we will prove that the number (u-1/n) is not upper bound of a non-empty subset of R but the number (u+1/n) is an upper bound of S. Where u is supremum of S and n is any number.