سؤالين في 3.2 ابغى حلهم ؟؟ :)

[لولي12]

If f(x) = x/(x2 + 5), find f '(x) and f ''(x).

f '(x) =
1

f ''(x) =
2



If f is a differentiable function, find an expression for the

derivative of each of the following functions.
(a) 1



(b) 2



(c) 3



(d) 4