102. The sum of first n natural numbers is given by the expression n^2/2 + n/2 . Factorise this expression. 102. The sum of first n natural numbers is given by the expression n^2/2 + n/2 . Factorise this expression. July 27, 2021 Category: Chapter 14 - Factorisation , Chapter 9 - Algebraic Expressions and [...]