Arithmetic formula of all states are same and country.
Given AP is
a1,a2,a3,.................................an.
where a1 = First term and d(Common Difference)= a2-a1=a3-a2=.......................=an.-an-1
d(Common Difference)=second term - first term =third term - second term
so ,
nth term of AP(Arithmetic progression)
an= a+(n-1)d
Explanation :-
d=a2 - a1
d=a3 - a2
d= a4 - a3
.....................
......................
.....................
.....................
d=an.- an-1
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(n-1)d= - a1 +an
now , an= a1 +(n-1)d
