Edexcel Mathematics June 2022 · Paper 2 · Question 12 · ExamRizz

ExamRizzEdexcel MathematicsMathematics

June 2022 · Paper 2 · Question 12 · 6 marks

12. The function f is defined by f(x) = e3 24x xk+ where k is a positive constant. (a) Show that fʹ( x) = (12 x2 − 8x + 3k) g (x) where g( x) is a function to be found. (3) Given that the curve with equation y = f(x) has at least one stationary point, (b) find the range of possible values of k . (3) 31