Question

In an ap if an=3n-1 then common difference is

Answer 1

3n-1
put? = 1
=3*1-1
=3-1
=2

put n = 2
3*2-1
6-1=5

so
5-2
=3

difference =3

Answer 2

a1 = 3-1 =2
a2 = 6-1 =5
d = 5-2 =3