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Question Number 141935 by cesarL last updated on 24/May/21
$${Determine}\:{if}\:{the}\:{numbers}\:\mathrm{1},\:\mathrm{5},\:\mathrm{8}\: \\ $$ $${are}\:{in}\:{the}\:{range}\:{of}\:{the}\:{fuctions} \\ $$ $$ \\ $$ $${f}\left({x}\right)=\begin{cases}{\mathrm{2}{x}\:\:\:\:\:\:{if}\:\:−\mathrm{2}\leqslant{x}<\mathrm{2}}\\{\mathrm{3}\:\:\:\:\:\:\:\:\:{if}\:\:\:\:{x}=\mathrm{2}}\end{cases} \\ $$ $$ \\ $$