**5.4 - 2014 Q10 ****Answers**

10) A curve with equation y = f(x) passes through the point (4, 25). Given that

A) find f(x), simplifying each term. (5)

B) Find an equation of the normal to the curve at the point (4, 25).

Give your answer in the form

B) Find an equation of the normal to the curve at the point (4, 25).

Give your answer in the form

*ax + by + c = 0*, where a, b and c are integers to be found. (5)