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Determine the term independent of $x$ in the expansion of $(2x - \frac{1}{4x^2})^9$.
Mathematics 9709 · AS & A Level · Series
Series — practice question
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct use of the binomial general term, for example ${}^9C_3 \cdot 2^6 \cdot (-\tfrac14)^3$ or an equivalent expression.” …
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