Answer:
7,971,615
Explanation:
A geometric sequence is one in which the successive terms show a regular pattern of change defined by a common ratio i.e the division of the successive term with the previous term gives a constant known as the common ratio.
Where r is the common ratio, a is the first term and n is the number of term, the nth term Tn of a geometric sequence may be defined as
Tn = ar^(n-1)
where a = 5, r = 15/5 = 3
then T14 = 5 * 3(14 - 1)
= 7,971,615