Answer:
9
Step-by-step explanation:
Because each new term is obtained by adding 2 to the previous term, we identify this as an arithmetic sequence. The first term. a(1). is 3 and the common difference (d) is 2.
The general formula for an arithmetic sequence is a(n) = a(1) + d(n -1)
Here the specific formula is a(n) = 3 + 2(n - 1)
and the fourth term, a(4), is 3 + 2(4 - 1), or 3 + 6, or 9
