Edexcel Mathematics October 2021 · Paper 2 · Question 5 · ExamRizz

ExamRizzEdexcel MathematicsMathematics

October 2021 · Paper 2 · Question 5 · 7 marks

5. The curve C has equation y = 5x4 – 24x3 + 42x2 – 32x + 11 x ∈  (a) Find (i) d dy x (ii) d d2 2y x(3) (b) (i) Verify that C has a stationary point at x = 1 (ii) Show that this stationary point is a point of inflection, giving reasons for your answer . (4) 11