MathDB
Problems
Contests
National and Regional Contests
PEN Problems
PEN J Problems
7
7
Part of
PEN J Problems
Problems
(1)
J 7
Source:
5/25/2007
Show that if the equation
ϕ
(
x
)
=
n
\phi(x)=n
ϕ
(
x
)
=
n
has one solution, it always has a second solution,
n
n
n
being given and
x
x
x
being the unknown.
Divisor Functions