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Mathematics
Problem
For a bijective function $f: \mathbb R \to \mathbb R
,
w
h
a
t
i
s
t
h
e
v
a
l
u
e
o
f
, what is the value of
,
w
ha
t
i
s
t
h
e
v
a
l
u
eo
f
f^{-1}\bigl(f(x)\bigr)
f
o
r
a
n
y
for any
f
or
an
y
x
i
n
t
h
e
d
o
m
a
i
n
o
f
in the domain of
in
t
h
e
d
o
main
o
f
f$? a)
f
−
1
(
x
)
f^{-1}(x)
f
−
1
(
x
)
b)
x
x
x
c)
1
f
(
x
)
\dfrac{1}{f(x)}
f
(
x
)
1
d)
f
(
x
)
f(x)
f
(
x
)
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