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Mathematics
Problem
If
f
(
x
)
=
x
2
−
2
a
x
+
a
(
a
+
1
)
f(x) = x^2 - 2ax + a(a+1)
f
(
x
)
=
x
2
−
2
a
x
+
a
(
a
+
1
)
,
f
:
[
a
,
∞
)
→
[
a
,
∞
)
f: [a, \infty) \to [a, \infty)
f
:
[
a
,
∞
)
→
[
a
,
∞
)
. If one of the solutions of the equation
f
(
x
)
=
f
−
1
(
x
)
f(x) = f^{-1}(x)
f
(
x
)
=
f
−
1
(
x
)
is 5049, the other may be a. 5051 b. 5048 c. 5052 d. 5050
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