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Modular Arithmetic
medium
0:00.0
Evaluate
ϕ
(
p
2
)
\phi(p^2)
ϕ
(
p
2
)
where
p
p
p
is a prime.
A
p
p
p
B
p
−
1
p-1
p
−
1
C
p
(
p
−
1
)
p(p-1)
p
(
p
−
1
)
D
p
2
−
1
p^2-1
p
2
−
1
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