Question Number 28542 by abdo imad last updated on 26/Jan/18
$${if}\:\:\:\:\:\frac{\mathrm{1}}{\mathrm{1}−{x}−{y}−{xy}}\:=\:\sum_{{n}=\mathrm{0}} ^{\infty} \:\:{g}_{{n}} \left({y}\right)\:{x}^{{n}} \:\:{find}\:{g}_{{n}} \:\:. \\ $$
if-1-1-x-y-xy-n-0-g-n-y-x-n-find-g-n-