Answer:
an = -45 +15(n -1)
Step-by-step explanation:
The explicit formula for an arithmetic sequence is ...
an = a1 +d(n -1)
where an is the n-th term; a1 is the first term (-45), and d is the common difference (15). Filling in the values for the given sequence, we find the formula to be ...
an = -45 +15(n -1)
