Find the solution to an=an−1+3a_n = a_{n-1} + 3an=an−1+3 with a0=23a_0 = 23a0=23.
3+23n3 + 23n3+23n
3cdot23n3 \\cdot 23^n3cdot23n
23cdot3n23 \\cdot 3^n23cdot3n
23+3n23 + 3n23+3n