Question

The recursive formula for an arithmetic sequence is `a_n=a_(n-1)+d` if the common difference is `-15` and `a_6=7` what is the value of `a_7`?

Answer 1

Use the recursive formula: `a_7=a_6+d`.

Explanation:

`d` is the common difference, so `d=-15`.

Now, substitute and do the arithmetic.