[tex]\\ \sf\longmapsto |11-x|=1[/tex]
As we can see
[tex]\\ \sf\longmapsto D_f=\[1,11\][/tex]
So having 1 and 11 as domain we can say the equation is
[tex]\\ \sf\longmapsto |11-x|\geqslant 1[/tex]
As it's greater than and equal to the answer can be equal to (=) form.