9514 1404 393
Answer:
an = 9 -2(n -1)
Step-by-step explanation:
The general formula for the n-th term of an arithmetic sequence with first term a1 and common difference d is ...
an = a1 +d(n -1)
Your sequence has a1=9 and d=-2, so the formula is ...
an = 9 -2(n -1)
