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Mathematics
Problem
Calculate the sum of the series
∑
n
=
0
∞
9
(
3
10
)
n
\displaystyle\sum_{n=0}^{\infty} 9\left(\dfrac{3}{10}\right)^{n}
n
=
0
∑
∞
9
(
10
3
)
n
. a)
6.3
6.3
6.3
b)
27
7
\dfrac{27}{7}
7
27
c)
90
7
\dfrac{90}{7}
7
90
d)
90
13
\dfrac{90}{13}
13
90
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