Let
f
(
x
)
=
x
x
+
5
.
\displaystyle {f{{\left({x}\right)}}}=\frac{{x}}{{{x}+{5}}}.
f
(
x
)
=
x
+
5
x
.
Find the values of
x
\displaystyle {x}
x
where
f
′
(
x
)
=
4
\displaystyle {f}'{\left({x}\right)}={4}
f
′
(
x
)
=
4
.
Give exact answers (not decimal approximations).
x
=
\displaystyle {x}=
x
=
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\displaystyle
Enter your answer as a list of values separated by commas: Example: -4, 3, 2
Enter each value as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
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