The demand function for the Sicard wristwatch is given by the following function where d(x) (measured in units of a thousand) is the quantity demanded per week and x is the unit price in dollars.

Question

d(x) =
50
0.01x2 + 1
(0 ≤ x ≤ 20)
(a) Find d'(x).
d'(x) =

(b) Find the following values. (Round your answers to three decimal places.)
d '(5) =
d '(10) =
d '(15) =