Question

A(4) in the sequence 3,5,7,...

Answer 1

9

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