I am not able to understand the question?

#1

please explain this question for me.
what is the meaning of 3n+2…??

#2

@Anku47
series of 3n+2 means a series of numbers with n=1,2,3,4,…
hence the series will be 5,8,11,14,17…
as 3x1+2 = 5
3x2+2 = 8
3x3+2 = 11
and so on.