Sum of a Geometric Series
$$\displaystyle\sum_{n=3}^{\infty} \frac{6^{n-2}}{8^n}$$ is
A
$$\displaystyle\frac{27}{256}$$
B
$$\displaystyle\frac{9}{64}$$
C
$$\text{divergent}$$
D
$$\displaystyle\frac{3}{64}$$
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