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Mathematics
Mathematics
Problem
Find the value of
∑
k
=
1
n
1
\displaystyle \sum_{k=1}^{n} 1
k
=
1
∑
n
1
. a)
n
(
n
+
1
)
2
\dfrac{n(n+1)}{2}
2
n
(
n
+
1
)
b)
n
2
n^{2}
n
2
c)
n
n
n
d)
n
+
1
n+1
n
+
1
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