Question 8 - A-Level Maths

Exam Board	AQA
Module	AS Paper 2 (AS Paper 2)
Session	Specimen
Marks	6
Topic	Differentiation Applications
Type	Increasing/decreasing intervals

8 Prove that the function \(\mathrm { f } ( x ) = x ^ { 3 } - 3 x ^ { 2 } + 15 x - 1\) is an increasing function.
[0pt] [6 marks]