Mathematics 9709 · AS & A Level · Series

Series — practice question

(a)[2]

Find the coefficient of $x^2$ when $(x - \frac{2}{x})^6$ is expanded.

(b)[3]

Find the coefficient of $x^2$ when $(2 + 3x^2)(x - \frac{2}{x})^6$ is expanded.

Worked solution & mark scheme

This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Use binomial expansion on $(2+3x)(x-\frac{2}{x})^6$” …

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