**5.6 - 2013 Q9 ****Answers**

A) Show that: f'(

where

*x*) = 9*x*^{–2}+*A*+ B*x*^{2}where

*A*and*B*are constants to be found. (3)B) Find f"(

Given that the point (–3, 10) lies on the curve with equation

C) find f(

*x*). (2)Given that the point (–3, 10) lies on the curve with equation

*y*=f(*x*),C) find f(

*x*). (5)