Question

1. Find the sum of odd integers from 1 to 2001.​

Answer 1

Answer:

1002001

Explanation:

The odd integers from 1 to 2001 are 1, 3, 5, … 1999, 2001. This sequence forms an A.P. Hence, the sum of odd numbers from 1 to 2001 is 1002001.

Answer 2

Answer:

Integers from 1 to 2001 are 1,2,3,4......2001

odd integers is from 1 to 2001 are 1,3,5...1999,2001

So the A.Pis 1,3,5......199,2001

here

First term = a= 1

Common differences = d

=3-1

=2

Last term is =l=2001

Hope it will help you