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Mathematics
Mathematics
Problem
For a set with
n
n
n
elements, the number of reflexive relations on the set is a)
2
n
2
2^{n^{2}}
2
n
2
b)
2
n
(
n
−
1
)
2
2^{\frac{n(n-1)}{2}}
2
2
n
(
n
−
1
)
c)
2
n
2
−
n
2^{n^{2}-n}
2
n
2
−
n
d)
2
n
(
n
+
1
)
2
2^{\frac{n(n+1)}{2}}
2
2
n
(
n
+
1
)
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