Question

Sum of the first nth term of a series is 3^n-1.show that the terms of this series are in GP and find the first ,common ratio and sum of second,third of n terms of this series

Answer 1

Answer:

The behavior of the terms depends on the common ratio r . For r≠1 r ≠ 1 , the sum of the first n terms of a geometric series is given by the formula s=a1−rn1−r s = a 1 − r n 1 − r .