Question

For \(A=\{-1,0,1\}\), which ordered pair is a remaining element of \(A\times A\) besides \((-1,0)\) and \((0,1)\)?

Options

• \((0,2)\)

• \((-2,0)\)

• \((1,2)\)

• \((1,-1)\)

Answer 1

Every component of an ordered pair in \(A\times A\) must belong to \(A=\{-1,0,1\}\). Hence \((1,-1)\) is one of the remaining elements.