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Mathematics
Problem
Evaluate the series
∑
n
=
2
∞
9
4
n
\displaystyle \sum_{n=2}^{\infty} \dfrac{9}{4^{n}}
n
=
2
∑
∞
4
n
9
. a)
9
16
\dfrac{9}{16}
16
9
b)
3
4
\dfrac34
4
3
c)
9
8
\dfrac{9}{8}
8
9
d)
3
16
\dfrac{3}{16}
16
3
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