Q5 of 167 Page 19

Find the sum of first n odd natural numbers.

given an AP of first n odd natural numbers whose first term a is 1, and common difference d is 3

Given sequence is 1, 3, 5, 7……n


To find: the sum of first n natural numbers


Hence the sum is given by the formula


Substituting the values in the above equation we get



s = n2


More from this chapter

All 167 →
3

Find the sum of first n natural numbers.

 4

Find the sum of all - natural numbers between 1 and 100, which are divisible by 2 or 5

 6

Find the sum of all odd numbers between 100 and 200

 7

Show that the sum of all odd integers between 1 and 1000 which are divisible by 3 is 83667