Chapter 3.4, Problem 85E

  Assume both the graphs of f and g pass through the point $\left(\text{3},\text{2}\right),f\text{'}\left(\text{3}\right)=\text{5}$, and $g\text{'}(\text{3})=-\text{1}0.\text{ Ifp}\left(x\right)=f\left(x\right)g\left(x\right)$ and $q\left(x\right)=f\left(x\right)/g\left(x\right),$ find the following derivatives.

  85.     $q^{\prime }(\text{3})$