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Mathematics
Problem
Let
f
(
x
)
=
4
x
+
7
f(x)=4x+7
f
(
x
)
=
4
x
+
7
. Calculate
f
−
1
(
f
(
f
−
1
(
23
)
)
)
f^{-1}\bigl(f(f^{-1}(23))\bigr)
f
−
1
(
f
(
f
−
1
(
23
))
)
. a)
23
23
23
b)
11
11
11
c)
4
4
4
d)
16
16
16
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