Edexcel Mathematics October 2020 · Paper 2 · Question 13 · ExamRizz

ExamRizzEdexcel MathematicsMathematics

October 2020 · Paper 2 · Question 13 · 6 marks

13. The function g is defined by g (x) = 37 2ln() ln()x x− − x > 0 x ≠ k where k is a constant. (a) Deduce the value of k. (1) (b) Prove that gʹ x) > 0 for all values of x in the domain of g. (3) (c) Find the range of values of a for which g (a) > 0 (2) 39 40 41

Lesson: Laws of Indices