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Determine the positive value of the constant $k$.
Mathematics 9709 · AS & A Level · Series
Series — practice question
When $(kx + \frac{1}{x})^5 + (1 - \frac{2}{x})^8$ is expanded, the coefficient attached to $\frac{1}{x}$ is 74.
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This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Binomial expansion of $(kx+\frac{1}{x})^5$ and $(1-\frac{2}{x})^8$” …
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