Edexcel Mathematics October 2021 · Paper 1 · Question 5 · ExamRizz

ExamRizzEdexcel MathematicsMathematics

October 2021 · Paper 1 · Question 5 · 6 marks

5. In this question you should show all stages of your working. Solutions relying entir ely on calculator technology are not acceptable. A company made a profit of £20 000 in its first year of trading, Year 1 A model for future trading predicts that the yearly profit will increase by 8% each year, so that the yearly profits will form a geometric sequence. According to the model, (a) show that the profit for Year 3 will be £23 328 (1) (b) find the first year when the yearly profit will exceed £65 000 (3) (c) find the total profit for the first 20 years of trading, giving your answer to the nearest £1000 (2) 13

Lesson: Binomial Expansion for Positive Integer n