Edexcel Mathematics October 2020 · Paper 1 · Question 1 · ExamRizz

ExamRizzEdexcel MathematicsMathematics

October 2020 · Paper 1 · Question 1 · 5 marks

1. (a) Find the first four terms, in ascending powers of x, of the binomial expansion of 181 2+() x giving each term in simplest form. (3) (b) Expla in how you could use x = 1 32 in the expansion to find an approximation for 5 There is no need to carry out the calculation. (2) 3