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Danube Competition in Mathematics
2015 Danube Mathematical Competition
3
Danube Math Competition,juniors problem 3
Danube Math Competition,juniors problem 3
Source:
October 31, 2015
number theory
Problem Statement
Solve in N
a
2
=
2
b
3
c
+
1
a^2 = 2^b3^c + 1
a
2
=
2
b
3
c
+
1
.
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