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Determine the coefficient of $\frac{1}{x}$ in the expansion of $\left(x - \frac{2}{x}\right)^5$.
Mathematics 9709 · AS & A Level · Series
Series — practice question
Worked solution & mark scheme
This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “A correct differentiation that gives $-80/x$, or an equivalent result” …
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