Answer:
1 +7(n -1)
Explanation:
The difference between terms (d) is 7. The first term (a1) is 1. The n-th term (an) is given by the formula ...
an = a1 +d(n -1)
Filling in the known values, we can write the equation for the n-th term as ...
an = 1 +7(n -1)