Which recurrence relation describes the arithmetic sequence 3,7,11,15,…3, 7, 11, 15, \dots3,7,11,15,…?
an=an−1+3a_n = a_{n-1} + 3an=an−1+3
an=an−1+4a_n = a_{n-1} + 4an=an−1+4
an=4an−1+3a_n = 4a_{n-1} + 3an=4an−1+3
an=3an−1+4a_n = 3a_{n-1} + 4an=3an−1+4