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Mathematics
Problem
(
5
+
1
)
4
+
(
5
−
1
)
4
(\sqrt{5}+1)^{4}+(\sqrt{5}-1)^{4}
(
5
+
1
)
4
+
(
5
−
1
)
4
is a) an irrational number b) a negative real number c) a rational number d) a negative integer
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