Precalculus Examples

A=(-9,-4,1,2)
Step 1
The power set of a set S is the set of all subsets of S. The first subset will be set S itself. Next, find all subsets that contain one less element (in this case 3 elements). Continue with this process until finding all subsets including the empty set.
Power Set = {{-9,-4,1,2},{-4,1,2},{-9,-4,1},{-9,-4,2},{-9,1,2},{-4,1},{-4,2},{-9,-4},{-9,1},{-9,2},{1,2},{-4},{-9},{1},{2},{}}
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 [x2  12  π  xdx ]