Answer:
[tex]a_n=-3+4(n-1)[/tex]Step-by-step explanation:
This sequence can be interpreted as an arithmetic sequence, which has a general equation in the following format:
[tex]a_n=a_1+d(n-1)[/tex]In which a1 is the first term and d is the common ratio(the difference between the consecutive terms.
In this sequence:
The first term is -3.
The common ratio is ... = 9 - 5 = 5 - 1 = ... = 4
So the equation for the sequence is:
[tex]a_n=-3+4(n-1)[/tex]