Which of the following infinite series has a sum of 111?
∑n=1∞(1/2)n\sum_{n=1}^{\infty} (1/2)^n∑n=1∞(1/2)n
∑n=1∞(1/3)n\sum_{n=1}^{\infty} (1/3)^n∑n=1∞(1/3)n
∑n=0∞(1/3)n\sum_{n=0}^{\infty} (1/3)^n∑n=0∞(1/3)n
∑n=1∞(2/3)n\sum_{n=1}^{\infty} (2/3)^n∑n=1∞(2/3)n