Question

whats the formula of infinite GP ?

Answer 1

The nth term of a GP series is Tn= arn-1, where a = first term and r = common ratio = Tn/Tn-1) . The sum of infinite terms of a GP series S∞= a/(1-r) where 0< r<1. If a is the first term, r is the common ratio of a finite G.P.
Hope it helped !!!

Answer 2

The sum of an infinite geometric series with − 1 < r < 1 is given by the formula, S = a 1 1 − r. An infinite series that has a sum is called a convergent series and the sum is called the partial sum of the series.