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Find the constant $a$.
Mathematics 9709 · AS & A Level · Series
Series — practice question
In the expansion of $(2 + \frac{x}{2})^6 + (a + x)^5$, the coefficient of $x^2$ comes to $330$.
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This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct value of the coefficient of $x^2$ in $(2+\frac{x}{2})^6$” …
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