MATHEMATICS · Subjective · A Level · Mathematics · Sequences and series · Sequences and series
Problem
In a geometric progression with positive terms, the nth term is 32 and the sum of the first n terms is 62.
(i) Prove that n must be 5.
(ii) Hence determine the first term and the common ratio.
(iii) Using the result, find the value of the (n+2)th term.