(i)[2]
Find the coefficient of $x^2$ in the expanded form of $(2x - \frac{1}{2x})^6$.
(ii)[3]
Find the coefficient of $x^2$ in the expanded form of $(1 + x^2)(2x - \frac{1}{2x})^6$.
Mathematics 9709 · AS & A Level · Series
Series — practice question
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Selects the correct term from the binomial expansion of $(2x - \frac{1}{2x})^6$” …
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