Answer :

Given,

4th term of the series =


ar3 =


a = 1


7th term of a series =


ar6 = 2


Substituting ‘a’ in 1


× r6 =


r3 =


r3 = (3


equating power and base we will get


r =


The geometric series is a, ar, ar2, ar3


,2,…..


, , , ,……


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