Question

The domain of the following relation: R: {(3, -2), (1, 2), (-1, -4), (-1, 2)} is

{-1, 1, 3}

{-1, -1, 1, 3}

{-4, -2, 2, 2}

{-4, -2, 2}

Answer 1

help

Answer 2

someone

Answer 3

{(3, -2), (1, 2), (-1, -4), (-1, 2)}
dR={3,1,-1,-1}
but -1 duplicated
so dR={3,1,-1}