Edexcel Mathematics June 2022 · Paper 1 · Question 11 · ExamRizz

ExamRizzEdexcel MathematicsMathematics

June 2022 · Paper 1 · Question 11 · 7 marks

11. y xC1 OC2 Figure 4 Figure 4 shows a sketch of part of the curve C1 with equation y = 2 x3 + 10 x > 0 and part of the curve C2 with equation y = 42 x − 15 x2 − 7 x > 0 (a) Verify that the curves intersect at x = 1 2 (2) The curves intersect again at the point P (b) Using algebra and showing all stages of working, find the exact x coordinate of P (5) 29 30 31