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Find the term with no $x$ in the expansion of $(2x + \frac{1}{4x^2})^6$.
Mathematics 9709 · AS & A Level · Series
Find the term with no $x$ in the expansion of $(2x + \frac{1}{4x^2})^6$.
This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct expression $6C2\times (2x)^4 \times \frac{1}{(4x^2)^2}$ or equivalent” …