Answer:
1.5
Step-by-step explanation:
As the common difference is not same for all terms, the given sequence is a geometric sequence
the standard formula for a geometric sequence is:
[tex]a_n=a_1r^{n-1}[/tex]
The formula to calculate common ratio is:
[tex]r = \frac{a_n}{a_{n-1}}[/tex]
Dividing the term by previous term
So,
r = 12/8 = 18/12 = 27/18 = 1.5
The value for common ratio will be:
1.5 ..
