(a)[4]
Obtain the full expansion of $(2x - \frac{3}{x})^4$.
(b)[2]
Hence, work out the coefficient of $x^2$ in the expansion of $(x^2 + 5)(2x - \frac{3}{x})^4$.
Mathematics 9709 · AS & A Level · Series
Mathematics 9709 · AS & A Level · Series
Obtain the full expansion of $(2x - \frac{3}{x})^4$.
Hence, work out the coefficient of $x^2$ in the expansion of $(x^2 + 5)(2x - \frac{3}{x})^4$.