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Mathematics
Mathematics
Problem
Calculate the sum of the infinite series
∑
n
=
0
∞
9
(
0.8
)
n
+
2
\displaystyle\sum_{n=0}^{\infty} 9\,(0.8)^{\,n+2}
n
=
0
∑
∞
9
(
0.8
)
n
+
2
.
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