A sequence has closed form an=2⋅5n+3⋅(−2)na_n = 2 \cdot 5^n + 3 \cdot (-2)^nan=2⋅5n+3⋅(−2)n. Which recurrence relation does it satisfy?
an=3an−1+10an−2a_n = 3a_{n-1} + 10a_{n-2}an=3an−1+10an−2
an=3an−1−10an−2a_n = 3a_{n-1} - 10a_{n-2}an=3an−1−10an−2
an=7an−1−10an−2a_n = 7a_{n-1} - 10a_{n-2}an=7an−1−10an−2
an=−3an−1+10an−2a_n = -3a_{n-1} + 10a_{n-2}an=−3an−1+10an−2