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Diophantine Equations
hard
0:00.0
Find the smallest positive
x
x
x
for
x
2
−
15
y
2
=
1
x^2 - 15y^2 = 1
x
2
−
15
y
2
=
1
.
A
8
8
8
B
16
16
16
C
31
31
31
D
4
4
4
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