Question

find the sum of odd integers from 1 to 2001

Answer 1

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

Odd integers from 1 to 2001 are 1,3,5,......1999,2001

this sequence forms an A.P as difference between the consecutive terms is constant.

So the A.P is 1,3,5......1999,2001
Here,
First term = a = 1
Common difference = d
= 3-1
= 2

& last term = l = 2001

Answer 2

Answer:

Hlo mate pls refer to the attachment

Hope it helps.