Find the solution to an=an−1+3a_n = a_{n-1} + 3an=an−1+3 with a0=5a_0 = 5a0=5.
5cdot3n5 \\cdot 3^n5cdot3n
3cdot5n3 \\cdot 5^n3cdot5n
5+3n5 + 3n5+3n
3+5n3 + 5n3+5n