Edexcel Mathematics January 2023 · Paper 1 · Question 9 · ExamRizz

ExamRizzEdexcel MathematicsMathematics

January 2023 · Paper 1 · Question 9 · 7 marks

9. The first three terms of a geometric sequence are 3k + 4 12 – 3 k k + 16 where k is a constant. (a) Show that k satisfie s the equation 3k2 – 62 k + 40 = 0 (2) Given that the sequence converges, (b) (i) find the value of k , giving a reason for your answer, (ii) find the value of S∞ (5) 23

Lesson: Binomial Expansion for Positive Integer n