Find the particular solution format for an−4an−1=3na_n - 4a_{n-1} = 3^nan−4an−1=3n.
Ancdot3nAn \\cdot 3^nAncdot3n
Ancdot4nAn \\cdot 4^nAncdot4n
Acdot4nA \\cdot 4^nAcdot4n
Acdot3nA \\cdot 3^nAcdot3n