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sgn-x-




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

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