Which recurrence relation describes the sequence an=2n+3⋅(−2)na_n = 2^n + 3 \cdot (-2)^nan=2n+3⋅(−2)n?
an=4an−2a_n = 4a_{n-2}an=4an−2
an=−4an−2a_n = -4a_{n-2}an=−4an−2
an=an−1+2an−2a_n = a_{n-1} + 2a_{n-2}an=an−1+2an−2
an=2an−1−4an−2a_n = 2a_{n-1} - 4a_{n-2}an=2an−1−4an−2