The above formula is also called Geometric Progression formula or G.P . formula to find the sum of GP of finite terms. Here, r is the common ratio of G.P . formula . Learn about the formulas to find the sum of n terms of a geometric progression (GP) for finite and infinite GP. Understand the proofs with solved examples. A Geometric Progression ( GP ) is a sequence of numbers where every term after the first is derived by multiplying the preceding term by a constant factor known as the common ratio. GP Sum The sum of a GP is the sum of a few or all terms of a geometric progression. GP sum is calculated by one of the following formulas: Sum of n terms of GP , S n = a (1 - r n) / (1 - r), when r ≠ 1 Sum of infinite terms of GP , S n = a / (1 - r), when |r| < 1 Here, 'a' is the first term and 'r' is the common ratio of GP . A series of numbers obtained by multiplying or dividing each preceding term, such that there is a common ratio between the terms (that is not equal to 0) is the ...
