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Mathematics
Mathematics
Problem
Evaluate
∑
k
=
2
2
n
+
1
8
\displaystyle\sum_{k=2}^{2n+1} 8\,
k
=
2
∑
2
n
+
1
8
where
n
n
n
is a positive integer. a)
8
n
8n
8
n
b)
8
(
2
n
−
1
)
8(2n-1)
8
(
2
n
−
1
)
c)
16
n
16n
16
n
d)
8
(
2
n
+
1
)
8(2n+1)
8
(
2
n
+
1
)
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