MATHEMATICS · Multi-part · CBSE · Mathematics · Sequences and Series · Sequences and Series
Problem
The first term of a G.P. is positive. Its 4th term is −135 and its 7th term is 10935.
(a) Determine the first term and the common ratio of the progression.
(b) State whether the terms of the G.P. alternate in sign and give a brief reason.
(c) Find the sum of the first 6 terms.