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1
2021 Algebra/NT #1: Who is an integer?
2021 Algebra/NT #1: Who is an integer?
Source:
May 30, 2021
algebra
number theory
Problem Statement
Compute the sum of all positive integers
n
n
n
for which the expression
n
+
7
n
−
1
\frac{n+7}{\sqrt{n-1}}
n
−
1
n
+
7
is an integer.
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