Question 16 - A-Level Maths

Exam Board	WJEC
Module	Unit 1 (Unit 1)
Session	Specimen
Topic	Differentiation Applications
Type	Increasing/decreasing intervals

16. Find the range of values of $x$ for which the function $$f ( x ) = x ^ { 3 } - 5 x ^ { 2 } - 8 x + 13$$ is an increasing function.