Question

In an A.P Sum of n terms = n² +n then value of common difference is​

Answer 1

Answer:

sum of n terms= n2+n

S1=1+1=2

S2= 4+2=6

A2= s2-s1 = 6-2

= 4

d=a2-a1

= 4-2

= 2//

therefore common difference of the given AP I'd 2//