Final answer:
The recursive formula for the given sequence is a_n = a_n-1 - 16.
Step-by-step explanation:
To find the recursive formula for the given sequence, it's important to observe the pattern of the sequence. The sequence starts with 17, and then each subsequent term is obtained by subtracting 16 from the previous term. So, the recursive formula for the given sequence is:
an = an-1 - 16
where an represents the nth term of the sequence and an-1 represents the (n-1)th term.