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Mathematics
Problem
For
f
(
x
)
=
1
x
+
2
f(x)=\dfrac{1}{x+2}
f
(
x
)
=
x
+
2
1
, derive a simplified expression for the instantaneous rate of change of
f
f
f
at an arbitrary point
x
=
a
x=a
x
=
a
.
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