regla
de
la
cadena
f
(
x
)
=
x
2
-
1
x
2
-
1
3
regla
de
la
cadena
f
(
x
)
=
x
2
-
1
x
2
-
1
3
(1)
f
´
(
x
)
=
3
x
2
-
1
x
2
-
1
2
2
x
x
2
-
1
-
x
2
-
1
2
x
x
2
-
1
=
3
x
2
-
1
x
2
-
1
2
-
4
x
(
x
2
-
1
)
2
f
´
(
x
)
=
3
x
2
-
1
x
2
-
1
2
2
x
x
2
-
1
-
x
2
-
1
2
x
x
2
-
1
=
3
x
2
-
1
x
2
-
1
2
-
4
x
(
x
2
-
1
)
2
(2)