Question Number 114706 by mohammad17 last updated on 20/Sep/20
Commented by mohammad17 last updated on 20/Sep/20
$${please}\:{sir}\:{help}\:{me} \\ $$
Answered by 1549442205PVT last updated on 20/Sep/20
$$\mathrm{16}\leqslant\mathrm{x}^{\mathrm{2}} +\mathrm{y}^{\mathrm{2}} +\mathrm{z}^{\mathrm{2}} <\mathrm{81} \\ $$