9709 P12 - Jun 2017 - Q1
1001
(i) Find the coefficient of \(x\) in the expansion of \(\left(2x - \frac{1}{x}\right)^5\).
(ii) Hence find the coefficient of \(x\) in the expansion of \((1 + 3x^2) \left(2x - \frac{1}{x}\right)^5\).
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