A series is defined by an=3n+2n6na_n = \frac{3^n + 2^n}{6^n}an=6n3n+2n. Find the sum ∑n=1∞an\sum_{n=1}^{\infty} a_n∑n=1∞an.
1.51.51.5
111
222
0.50.50.5