Question Number 104270 by Study last updated on 20/Jul/20
$${sgn}\left(\mid{x}\mid\right)=? \\ $$
Answered by mr W last updated on 20/Jul/20
$${sgn}\left(\mid{x}\mid\right)=\mathrm{0},\:{if}\:{x}=\mathrm{0} \\ $$$${sgn}\left(\mid{x}\mid\right)=\mathrm{1},\:{if}\:{x}\neq\mathrm{0} \\ $$