If an=rna_n = r^nan=rn and ∑n=1∞an=2\sum_{n=1}^{\infty} a_n = 2∑n=1∞an=2, find ∑n=1∞an2\sum_{n=1}^{\infty} a_n^2∑n=1∞an2.
4/34/34/3
111
2/32/32/3
0.50.50.5