Question

The sum of N th term of ap is 3x spuare +2n then find n th term , common Difference, and sum of 20 terms​

Answer 1

Answer:

The common difference of an A.P. is given by a

n+1

−a

n

∴d=a

n+1

−a

n

=3+2(n+1)−(3+2n)

=2n+2−2n

=2

Hence, the common difference d=2