<Dd> a n = a 1 + (n − 1) d (\ displaystyle \ a_ (n) = a_ (1) + (n - 1) d), </Dd> <P> and in general </P> <Dl> <Dd> a n = a m + (n − m) d (\ displaystyle \ a_ (n) = a_ (m) + (n-m) d). </Dd> </Dl> <Dd> a n = a m + (n − m) d (\ displaystyle \ a_ (n) = a_ (m) + (n-m) d). </Dd>

What is the difference between arithmetic progression and geometric progression