2009 HCI Promo Q3
Expand $\frac{{{x}^{2}}+2x}{2{{x}^{2}}+1}$ in ascending powers of $x$ up to and including the term in ${{x}^{5}}$. State the range of values of $x$ for which this expansion is valid.
[3]
Find, in the simplest form, the coefficient of ${{x}^{2017}}$ in this expansion.
[2]
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