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Mathematics, 26.05.2021 14:00 hncriciacheichi

The coefficient of $\frac{1}{x^{3} }$ is 512 in the expansion of $(\frac{2}{x} + ax^{2})^{9}$ , where a<0. i) find the value of a
ii) using the value of a found in part i), show that the term in $\frac{1}{x^{4} }$ does not exist in the expansion of $(\frac{2}{x} + ax^{2} )^{9} (\frac{1}{8x} +\frac{x^{2} }{12})$

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The coefficient of is 512 in the expansion of , where a<0. i) find the value of a
ii) us...

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