i have a question .. Find the sum up to n terms of the sequence: 0.7, 0.77, 0.777,.... Share with your friends Share 0 Pia Vanave answered this sum of n terms = n( 7 + 10n ) / 20.......... -1 View Full Answer Manpreet Singh answered this To find the sum of the first n terms of an arithmetic series use the formula, 0