.jpg)
ALL IMPORTANT FORMULAS
Some Useful Chapter wise Formulas : Like & Share Post
==============================================
1. Sum of first n natural numbers = n(n+1)/2
2. Sum of the squares of first n natural numbers = n(n+1)(2n+1)/6
3. Sum of the cubes of first n natural numbers = [n(n+1)/2]^2
4. Sum of first n natural odd numbers = n^2
5. Average = (Sum of items)/Number of items
Arithmetic Progression (A.P.):
==========================
An...