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4
Functional Equation
Functional Equation
Source:
February 19, 2016
function
algebra
functional equation
Problem Statement
Find all functions
f
:
N
→
N
f:\mathbb{N}\to\mathbb{N}
f
:
N
→
N
such that
f
(
f
(
n
)
)
=
n
+
2015
f(f(n))=n+2015
f
(
f
(
n
))
=
n
+
2015
where
n
∈
N
.
n\in \mathbb{N}.
n
∈
N
.
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