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PEN K Problems
1
1
Part of
PEN K Problems
Problems
(1)
K 1
Source:
5/25/2007
Prove that there is a function
f
f
f
from the set of all natural numbers into itself such that
f
(
f
(
n
)
)
=
n
2
f(f(n))=n^2
f
(
f
(
n
))
=
n
2
for all
n
ā
N
n \in \mathbb{N}
n
ā
N
.
function
Functional Equations
pen