2020 Paper 1 (26/03/2025)

Question 1

Value of “x” for binomial expansion?

Answer 1

Substituting this value into unexpanded expression will give a value close to the approximation. If there is a factor difference this needs to be applied to expanded version.

Question 2

What is an interger solution?

Answer 2

Whole Number solution

Question 3

Validating Root of curve?

Answer 3

Use upper and lower limits of solution and if function is continuous and theres a sign change it means there is a root present