General formula for the geometric series is
S = a + aq + aq^2 + aq^3 + ....
Comparison with the given series
S = 500 + 300 + 180 + 108
gives that the common ratio q is
q = 300/500 = 180/300 = 108/180 = 3/5 = 0.6
Ra H.
asked • 09/03/19What is the common ratio in the geometric series?
Sn = 500 + 300 + 180 + 108
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