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Mathematics
Problem
Simplify when possible. The answers are in Chapter 23, starting on page 464. 4. Find
f
′
(
x
)
f^{\prime}(x)
f
′
(
x
)
if
f
(
x
)
=
(
x
x
2
+
1
)
3
f(x)=\left(\frac{x}{x^{2}+1}\right)^{3}
f
(
x
)
=
(
x
2
+
1
x
)
3
.
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