Question Number 26508 by gunawan last updated on 26/Dec/17
$$\mathrm{A}=\left\{\frac{{m}}{{n}}+\frac{\mathrm{8}{n}}{{m}}\::\:{m},\:{n}\:\in\:{N}\right\},\:\mathrm{N}=\:\mathrm{Natural}\:\mathrm{numbers} \\ $$$$\mathrm{find}\:\mathrm{sup}\left(\mathrm{A}\right)\:\mathrm{and}\:\mathrm{inf}\left(\mathrm{A}\right) \\ $$