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Mathematics
Problem
Let
f
(
x
)
=
x
3
+
2
x
f(x)=x^{3}+2x
f
(
x
)
=
x
3
+
2
x
. Determine
(
f
−
1
)
′
(
3
)
(f^{-1})'(3)
(
f
−
1
)
′
(
3
)
. a)
5
5
5
b)
1
29
\dfrac{1}{29}
29
1
c)
1
5
\dfrac{1}{5}
5
1
d)
1
3
\dfrac{1}{3}
3
1
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