## common difference of arithmetic progression or sequence

Common difference of arithmetic progression or sequence is defined as the difference between the two consecutive terms in the arithmetic progression or sequence or series. It is constant across the whole series if $a_1$,$a_2$ ,$a_3$.$a_4$ ….. are in arithmetic progression or sequence then $d=a_2 -a_1 = a_3 -a_2 =a_4 -a_3$…. If the common difference is not same across the series ,then series is not in … Continue reading common difference of arithmetic progression or sequence