The functions and are differentiable. The function is defined as:
f
(
x
)
g
(
x
)
h
(
x
)
h
(
x
)
=
g
(
x
)
+
f
(
x
)
If 8, and 1, what is ?
f
(
7
)
=
–
f
′
(
7
)
=
9
,g
(
7
)
=
0
,g
′
(
7
)
=
–
h
′
(
7
)
Simplify any fractions.
h
′
(
7
)
=
ref_doc_title.
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