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Find the value of $k$ and then determine the coefficient of $x^2$ in the expansion.
Mathematics 9709 · AS & A Level · Series
Series — practice question
For the expansion of $(kx + \frac{2}{x})^4$, with $k$ a positive constant, the term that does not contain $x$ has value $150$.
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Select the correct term and obtain $6(kx)^2\left(\frac{2}{x}\right)^2$” …
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