A GP can be finite or infinite. In the case of an infinite GP, the formula to find the sum of its first 'n' terms is, Sn = a(1 - rn) / (1 - r), where 'a' is the first term and 'r' is the common ratio of the GP. But what if we have to find the sum of all ...
sum of n terms of ap for an ap, the sum of the first n terms can be calculated if the first term, common difference and the total terms are known. the formula for the arithmetic progression sum is explained below: consider an ap consisting “n” terms. s n = n/2[2a + (n −...