Let f(x)=1/x-7 and g(x)=√x find f+g
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Algebra Examples
Popular Problems Algebra Find f(g(x)) f(x)=1/(x-7) , g(x)=4/x+7
f
(
x
)
=
1
x
−
7
,
g
(
x
)
=
4
x
+
7
Set up the composite result function.
f
(
g
(
x
)
)
Evaluate
f
(
g
(
x
)
)
by substituting in the value of
g
into
f
.
f
(
4
x
+
7
)
=
1
(
4
x
+
7
)
−
7
Simplify the denominator.
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f
(
4
x
+
7
)
=
1
4
x
Multiply the numerator by the reciprocal of the denominator.
f
(
4
x
+
7
)
=
1
(
x
4
)
Multiply
x
4
by
1
.
f
(
4
x
+
7
)
=
x
4
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