Question Number 208489 by Tawa11 last updated on 17/Jun/24
Answered by Berbere last updated on 17/Jun/24
$${x}^{\mathrm{4}} +\mathrm{1}+\frac{\mathrm{1}}{{x}^{\mathrm{4}} +\mathrm{1}}−\mathrm{4} \\ $$$$\geqslant\mathrm{2}\sqrt{\frac{{x}^{\mathrm{4}} +\mathrm{1}}{{x}^{\mathrm{4}} +\mathrm{1}}}−\mathrm{4}=−\mathrm{2} \\ $$$${equaliti}\:\:{x}=\mathrm{0} \\ $$
Commented by Tawa11 last updated on 17/Jun/24
$$\mathrm{Thanks}\:\mathrm{sir} \\ $$