Answer:
<h2>18n</h2>Step-by-step explanation:
In the Fibonacci sequence In mathematics, the Fibonacci numbers, commonly denoted , form a sequence, called the Fibonacci sequence, such that each number is the sum of the two preceding ones, starting from 0 and 1.
Given data
First term= n
second term = 3n
third term = 4n
According to Fibonacci sequence the fourth term is
the Fifth term is
hence the sixth term is