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Mathematics
Mathematics
Problem
If
f
:
R
+
→
R
+
f: \mathbb{R}^+ \rightarrow \mathbb{R}^+
f
:
R
+
→
R
+
is a polynomial function satisfying the functional equation
f
(
f
(
x
)
)
=
6
x
−
f
(
x
)
f(f(x)) = 6x - f(x)
f
(
f
(
x
))
=
6
x
−
f
(
x
)
, then
f
(
17
)
f(17)
f
(
17
)
is:
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