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The best way to know if a series is convergent or not is to calculate their infinite sum using limits. You can add a finite number of terms in a geometric sequence by using the geometric sequence formula. Worked Example Finite Geometric Series Sigma Notation Video The given series is not geomet…

Finite geometric series to find the sum of a finite geometric series use the formula s n a 1 1 r n 1 r r 1. Divide the first equation by the second equation to get 1 r 1 r 24 27 which gives 1 r 2 8 9 which gives r 2 1 9 which gives r 1 3. Https Encrypted Tbn0 Gstatic Com Images Q Tbn 3aand9gctyz…