9709 P12 - Jun 2020 - Q1
982
(a) Find the coefficient of \(x^2\) in the expansion of \(\left(x - \frac{2}{x}\right)^6\).
(b) Find the coefficient of \(x^2\) in the expansion of \((2 + 3x^2)\left(x - \frac{2}{x}\right)^6\).
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