A a n dn 1 1 1 1 2 i i i a a a 1 2 n n a a S n 2 11 n 2 a n d S n Geometric Series Formulas. Therefore an alternating series is also a unit series when -1 r 0 and a r 1 for example coefficient a 17 and common ratio r -07. Math formulas and cheat sheet generator for arithmetic and geometric series.
Geometric series is a series in which ratio of two successive terms is always constant.
A geometric progression is a sequence where each term is r times larger than the previous term. The first 20 odd numbers. Here the ratio of any two terms is 12 and the series terms values get increased by factor of 12. Arn n j 0arj a n j 0rj.