Find the Power Set A={8,1,2}

The power set of a set ${\displaystyle S}$ is the set of all subsets of ${\displaystyle S}$. The first subset will be set ${\displaystyle S}$ itself. Next, find all subsets that contain one less element (in this case ${\displaystyle 2}$ elements). Continue with this process until finding all subsets including the empty set.

Power Set = ${\displaystyle \{\{1,2,8\},\{1,2\},\{8,1\},\{8,2\},\left\{1\right\},\left\{2\right\},\left\{8\right\},\left\{\right\}\}}$