Answers edited by Mauricio M.
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What is the derivative of
(-x^2+5)/(x^2+5)^2
−
x
2
+
5
(
x
2
+
5
)
2
?
What is
(f(x+h) - f(x))/h
f
(
x
+
h
)
−
f
(
x
)
h
when
f(x) = x^2+9x-3
f
(
x
)
=
x
2
+
9
x
−
3
?