Answer :
ARITHMETIC PROGRESSION MEANS SEQUENCE OF NUMBER HAVE DIFFERENCE BETWEEN THE CONSECUTIVE TERM IS CONSTANT.
EG:- 2,4,6,8..........Nth TERM
D= COMMON DIFFERENCE
A= FIRST TERM
N= Nth TERM
an= a+(n-1)*d
EG:- 2,4,6,8..........Nth TERM
D= COMMON DIFFERENCE
A= FIRST TERM
N= Nth TERM
an= a+(n-1)*d