A recurrence relation an=5an−1a_n = 5a_{n-1}an=5an−1 has the solution an=A(r)na_n = A(r)^nan=A(r)n. What is the value of rrr?
r=1r = 1r=1
r=5r = 5r=5
r=15r = \frac{1}{5}r=51
r=0r = 0r=0