Mathematics 9709 · AS & A Level · Series

Series — practice question

(i)[2]

Determine the coefficients of $x^4$ and $x^5$ in the expansion of $(1 - 2x)^5$.

(ii)[2]

It is stated that, after $(1 + px)(1 - 2x)^5$ is expanded, there is no term in $x^5$. Find the value of the constant $p$.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “A fully simplified result showing $80x^4$” …