Determine which of the following is equivalent to the infinite sum S=∑n=1∞2n−13nS = \sum_{n=1}^{\infty} \frac{2^{n-1}}{3^n}S=∑n=1∞3n2n−1.
S=0.5S = 0.5S=0.5
S=1S = 1S=1
S=0.75S = 0.75S=0.75
S=0.666...S = 0.666...S=0.666...