Q. 55.0( 1 Vote )

How many consecutive terms starting from the first term of the series

(i) 3 + 9 + 27 + … would sum to 1092 ? (ii) 2 + 6 + 18 + … would sum to 728 ?

Answer :


(i) First term = 3

Common ratio = = 3


Sum of n terms =


Sum of n terms =


1092 =


728 =


729 =


n = 6


(ii) First term = 2


Common ratio = = 3


Sum of n terms =


728 =


728 =


729 =


n = 6


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