Question

Recursive equation for arithmetic sequence

Answer 1

Explanation:

A recursive formula takes the previous answer and does something with it to get the next member of sequence.

t_n = t_n-1 + 3

n≥2

So for t_2 you get t_2 = t_1 + 3

t_1 = - 21

t_2 = -21 + 3 = -18