Solución
h
′
(
x
)
=
3
x
2
f
(
x
)
+
x
3
f
′
(
x
)
h'\left( x \right) = 3{x^2}f\left( x \right) + {x^3}f'\left( x \right)
h
′
(
x
)
=
3
x
2
f
(
x
)
+
x
3
f
′
(
x
)