?? - 2015 q9
9. Given that k is a negative constant and that the function f(x) is defined by
(a) show that
(b) Hence find f '(x) , giving your answer in its simplest form. (3)
(c) State, with a reason, whether f(x) is an increasing or a decreasing function. Justify your answer. (2)
(c) State, with a reason, whether f(x) is an increasing or a decreasing function. Justify your answer. (2)