Question Number 163735 by amin96 last updated on 09/Jan/22
Commented by mr W last updated on 11/Jan/22
$${i}\:{think}\:{question}\:{is}\:{wrong}. \\ $$$${c}\:{can}\:{be}\:{any}\:{value}\:{except}\:\mathrm{2}. \\ $$$${c}_{{min}} =−\infty,\:{c}_{{max}} =+\infty \\ $$