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Mathematics
Mathematics
Problem
If
f
(
1
)
=
1
f(1) = 1
f
(
1
)
=
1
,
f
′
(
1
)
=
3
f'(1) = 3
f
′
(
1
)
=
3
, then the derivative of
f
(
f
(
f
(
x
)
)
)
+
(
f
(
x
)
)
2
f(f(f(x))) + (f(x))^2
f
(
f
(
f
(
x
)))
+
(
f
(
x
)
)
2
at
x
=
1
x = 1
x
=
1
is: (a) 33 (b) 12 (c) 15 (d) 9
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