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N9
N9
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(1)
Number Theory 2
Source: APMC 2016#6
12/24/2016
Let
a
a
a
be a natural number,
a
>
3
a>3
a
>
3
. Prove there is an infinity of numbers n, for which
a
+
n
∣
a
n
+
1
a+n|a^{n}+1
a
+
n
∣
a
n
+
1
number theory