If a sequence is an=5na_n = 5^nan=5n, which recurrence relation does it satisfy?
an=5an−1a_n = 5a_{n-1}an=5an−1
an=an−1+5a_n = a_{n-1} + 5an=an−1+5
an=5an−1+5a_n = 5a_{n-1} + 5an=5an−1+5
an=an−1+5na_n = a_{n-1} + 5^nan=an−1+5n