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Past exam of the options II course of the University of Oxford
/
2013
/
C2
/
a
/
iii
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Year 2 of the mathematics course of the University of Oxford
Options II course of the University of Oxford
Past exam of the options II course of the University of Oxford
2013
C2
a
2026-10-31
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Solution
iii
Solution
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iii
The
second supplementary law for quadratic reciprocity
is
(
2/
p
)
=
(
−
1
)
(
p
2
−
1
)
/8
=
{
1
,
−
1
,
p
≡
1
,
7
(
mod
8
)
,
p
≡
3
,
5
(
mod
8
)
.
(1)
The
exponent
is an
integer
because every odd
square
is one
modulo
eight.
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(12)
a
C2
2013
Past exam of the options II course of the University of Oxford
Options II course of the University of Oxford
Year 2 of the mathematics course of the University of Oxford
Mathematics course of the University of Oxford
Undergraduate course of the University of Oxford
Course of the University of Oxford
University of Oxford
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